{
  "name": "Data behind: Primary care physician email list: what NPPES shows",
  "description": "34 NPI counts by generalist taxonomy code, taxonomy code, classification, general-versus-subspecialty code, practice state and time since last update from the CMS NPPES September 2026 file (records to 13 September 2026). One row per published figure, plus one row per derived figure with its formula and inputs. Taxonomy codes are self-reported; counts are NPI records, not people.",
  "dateModified": "2026-09-13",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "fixture": false,
  "columns": [
    "id",
    "kind",
    "entity",
    "attribute",
    "scenario",
    "value",
    "number",
    "unit",
    "scope",
    "input_price_scope",
    "scenario_scope",
    "formula",
    "expression",
    "source_owner",
    "source_url",
    "observed_at",
    "fixture"
  ],
  "grain": "one row per aggregate group (each published figure), plus one row per derived figure with its formula and inputs",
  "rows": [
    {
      "id": "r01",
      "kind": "observed",
      "entity": "Active individual NPIs whose primary taxonomy is one of the four primary care generalist codes",
      "attribute": "Total primary care physician NPIs",
      "scenario": "",
      "value": "399,949 active individual NPIs",
      "number": 399949,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "provenance.md#registry-files",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r02",
      "kind": "observed",
      "entity": "Physicians whose primary taxonomy code is 207Q00000X (Family Medicine)",
      "attribute": "Primary care physicians per generalist code",
      "scenario": "",
      "value": "157,208 of the 399,949 active primary care physician NPIs (39.3%)",
      "number": 157208,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r03",
      "kind": "observed",
      "entity": "Physicians whose primary taxonomy code is 207R00000X (Internal Medicine)",
      "attribute": "Primary care physicians per generalist code",
      "scenario": "",
      "value": "150,682 of the 399,949 active primary care physician NPIs (37.7%)",
      "number": 150682,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r04",
      "kind": "observed",
      "entity": "Physicians whose primary taxonomy code is 208000000X (Pediatrics)",
      "attribute": "Primary care physicians per generalist code",
      "scenario": "",
      "value": "75,143 of the 399,949 active primary care physician NPIs (18.8%)",
      "number": 75143,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r05",
      "kind": "observed",
      "entity": "Physicians whose primary taxonomy code is 208D00000X (General Practice)",
      "attribute": "Primary care physicians per generalist code",
      "scenario": "",
      "value": "16,916 of the 399,949 active primary care physician NPIs (4.2%)",
      "number": 16916,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r06",
      "kind": "observed",
      "entity": "Active individual NPIs classified Internal Medicine (general code and subspecialty codes)",
      "attribute": "Physicians per primary care classification",
      "scenario": "",
      "value": "308,743 active individual NPIs classified Internal Medicine",
      "number": 308743,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r07",
      "kind": "observed",
      "entity": "Active individual NPIs classified Family Medicine (general code and subspecialty codes)",
      "attribute": "Physicians per primary care classification",
      "scenario": "",
      "value": "166,715 active individual NPIs classified Family Medicine",
      "number": 166715,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r08",
      "kind": "observed",
      "entity": "Active individual NPIs classified Pediatrics (general code and subspecialty codes)",
      "attribute": "Physicians per primary care classification",
      "scenario": "",
      "value": "112,163 active individual NPIs classified Pediatrics",
      "number": 112163,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r09",
      "kind": "observed",
      "entity": "Internal Medicine physicians whose primary taxonomy is the general internal medicine code 207R00000X",
      "attribute": "Internal Medicine physicians by code type",
      "scenario": "",
      "value": "150,682 of the 308,743 active individual NPIs classified Internal Medicine (48.8%)",
      "number": 150682,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r10",
      "kind": "observed",
      "entity": "Internal Medicine physicians whose primary taxonomy is an internal medicine subspecialty code",
      "attribute": "Internal Medicine physicians by code type",
      "scenario": "",
      "value": "158,061 of the 308,743 active individual NPIs classified Internal Medicine (51.2%)",
      "number": 158061,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r11",
      "kind": "observed",
      "entity": "Pediatrics physicians whose primary taxonomy is the general pediatrics code 208000000X",
      "attribute": "Pediatrics physicians by code type",
      "scenario": "",
      "value": "75,143 of the 112,163 active individual NPIs classified Pediatrics (67.0%)",
      "number": 75143,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r12",
      "kind": "observed",
      "entity": "Pediatrics physicians whose primary taxonomy is a pediatrics subspecialty code",
      "attribute": "Pediatrics physicians by code type",
      "scenario": "",
      "value": "37,020 of the 112,163 active individual NPIs classified Pediatrics (33.0%)",
      "number": 37020,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r13",
      "kind": "observed",
      "entity": "Family Medicine physicians whose primary taxonomy is the general family medicine code 207Q00000X",
      "attribute": "Family Medicine physicians by code type",
      "scenario": "",
      "value": "157,208 of the 166,715 active individual NPIs classified Family Medicine (94.3%)",
      "number": 157208,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r14",
      "kind": "observed",
      "entity": "Family Medicine physicians whose primary taxonomy is a family medicine subspecialty code",
      "attribute": "Family Medicine physicians by code type",
      "scenario": "",
      "value": "9,507 of the 166,715 active individual NPIs classified Family Medicine (5.7%)",
      "number": 9507,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r15",
      "kind": "observed",
      "entity": "Primary care physicians practising in CA",
      "attribute": "Primary care physicians per practice state",
      "scenario": "",
      "value": "46,273 of the 399,949 active primary care physician NPIs (11.6%)",
      "number": 46273,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r16",
      "kind": "observed",
      "entity": "Primary care physicians practising in TX",
      "attribute": "Primary care physicians per practice state",
      "scenario": "",
      "value": "27,081 of the 399,949 active primary care physician NPIs (6.8%)",
      "number": 27081,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r17",
      "kind": "observed",
      "entity": "Primary care physicians practising in FL",
      "attribute": "Primary care physicians per practice state",
      "scenario": "",
      "value": "25,995 of the 399,949 active primary care physician NPIs (6.5%)",
      "number": 25995,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r18",
      "kind": "observed",
      "entity": "Primary care physicians practising in NY",
      "attribute": "Primary care physicians per practice state",
      "scenario": "",
      "value": "25,078 of the 399,949 active primary care physician NPIs (6.3%)",
      "number": 25078,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r19",
      "kind": "observed",
      "entity": "Primary care physicians practising in PA",
      "attribute": "Primary care physicians per practice state",
      "scenario": "",
      "value": "18,572 of the 399,949 active primary care physician NPIs (4.6%)",
      "number": 18572,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r20",
      "kind": "observed",
      "entity": "Primary care physicians practising in IL",
      "attribute": "Primary care physicians per practice state",
      "scenario": "",
      "value": "16,924 of the 399,949 active primary care physician NPIs (4.2%)",
      "number": 16924,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r21",
      "kind": "observed",
      "entity": "Primary care physicians practising in MI",
      "attribute": "Primary care physicians per practice state",
      "scenario": "",
      "value": "14,305 of the 399,949 active primary care physician NPIs (3.6%)",
      "number": 14305,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r22",
      "kind": "observed",
      "entity": "Primary care physicians practising in OH",
      "attribute": "Primary care physicians per practice state",
      "scenario": "",
      "value": "14,170 of the 399,949 active primary care physician NPIs (3.5%)",
      "number": 14170,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r23",
      "kind": "observed",
      "entity": "Primary care physicians practising in MA",
      "attribute": "Primary care physicians per practice state",
      "scenario": "",
      "value": "11,862 of the 399,949 active primary care physician NPIs (3.0%)",
      "number": 11862,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r24",
      "kind": "observed",
      "entity": "Primary care physicians practising in NC",
      "attribute": "Primary care physicians per practice state",
      "scenario": "",
      "value": "11,641 of the 399,949 active primary care physician NPIs (2.9%)",
      "number": 11641,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r25",
      "kind": "observed",
      "entity": "Primary care physicians practising in WA",
      "attribute": "Primary care physicians per practice state",
      "scenario": "",
      "value": "10,806 of the 399,949 active primary care physician NPIs (2.7%)",
      "number": 10806,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r26",
      "kind": "observed",
      "entity": "Primary care physicians practising in GA",
      "attribute": "Primary care physicians per practice state",
      "scenario": "",
      "value": "10,470 of the 399,949 active primary care physician NPIs (2.6%)",
      "number": 10470,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r27",
      "kind": "observed",
      "entity": "Primary care physicians practising in VA",
      "attribute": "Primary care physicians per practice state",
      "scenario": "",
      "value": "10,159 of the 399,949 active primary care physician NPIs (2.5%)",
      "number": 10159,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r28",
      "kind": "observed",
      "entity": "Primary care physicians practising in NJ",
      "attribute": "Primary care physicians per practice state",
      "scenario": "",
      "value": "9,869 of the 399,949 active primary care physician NPIs (2.5%)",
      "number": 9869,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r29",
      "kind": "observed",
      "entity": "Primary care physicians practising in MD",
      "attribute": "Primary care physicians per practice state",
      "scenario": "",
      "value": "8,049 of the 399,949 active primary care physician NPIs (2.0%)",
      "number": 8049,
      "unit": "NPIs",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r30",
      "kind": "observed",
      "entity": "Primary care physician NPI records last updated under 1 year before 1 October 2026 (last updated within five years of 1 October 2026)",
      "attribute": "Update age of primary care physician NPI records",
      "scenario": "",
      "value": "57,358 of the 399,949 active primary care physician NPI records (14.3%)",
      "number": 57358,
      "unit": "NPI records",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r31",
      "kind": "observed",
      "entity": "Primary care physician NPI records last updated 1 to 3 years before 1 October 2026 (last updated within five years of 1 October 2026)",
      "attribute": "Update age of primary care physician NPI records",
      "scenario": "",
      "value": "71,740 of the 399,949 active primary care physician NPI records (17.9%)",
      "number": 71740,
      "unit": "NPI records",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r32",
      "kind": "observed",
      "entity": "Primary care physician NPI records last updated 3 to 5 years before 1 October 2026 (last updated within five years of 1 October 2026)",
      "attribute": "Update age of primary care physician NPI records",
      "scenario": "",
      "value": "59,330 of the 399,949 active primary care physician NPI records (14.8%)",
      "number": 59330,
      "unit": "NPI records",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r33",
      "kind": "observed",
      "entity": "Primary care physician NPI records last updated 5 to 10 years before 1 October 2026 (last updated five or more years before 1 October 2026)",
      "attribute": "Update age of primary care physician NPI records",
      "scenario": "",
      "value": "75,395 of the 399,949 active primary care physician NPI records (18.9%)",
      "number": 75395,
      "unit": "NPI records",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "r34",
      "kind": "observed",
      "entity": "Primary care physician NPI records last updated 10 years or more before 1 October 2026 (last updated five or more years before 1 October 2026)",
      "attribute": "Update age of primary care physician NPI records",
      "scenario": "",
      "value": "136,126 of the 399,949 active primary care physician NPI records (34.0%)",
      "number": 136126,
      "unit": "NPI records",
      "scope": "",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "",
      "expression": "",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d01",
      "kind": "derived",
      "entity": "Top 3 by Primary care physicians per generalist code combined (207Q00000X (Family Medicine), 207R00000X (Internal Medicine) and 208000000X (Pediatrics))",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "383,033 NPIs",
      "number": 383033.0,
      "unit": "NPIs",
      "scope": "inputs r02, r03, r04",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "157,208 + 150,682 + 75,143",
      "expression": "157208+150682+75143",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d02",
      "kind": "derived",
      "entity": "Top 3 by Primary care physicians per generalist code: combined share of the 399,949 active primary care physician NPIs",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "95.8%",
      "number": 95.8,
      "unit": "%",
      "scope": "inputs r01, r02, r03, r04",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "383,033 ÷ 399,949 × 100 (the 399,949 active primary care physician NPIs)",
      "expression": "(157208+150682+75143)/399949*100",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "provenance.md#registry-files",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d03",
      "kind": "derived",
      "entity": "Family Medicine: share of the 399,949 active primary care physician NPIs",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "39.3%",
      "number": 39.3,
      "unit": "%",
      "scope": "inputs r01, r02",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "157,208 ÷ 399,949 × 100 (the 399,949 active primary care physician NPIs)",
      "expression": "(157208)/399949*100",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "provenance.md#registry-files",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d04",
      "kind": "derived",
      "entity": "Internal Medicine: share of the 399,949 active primary care physician NPIs",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "37.7%",
      "number": 37.7,
      "unit": "%",
      "scope": "inputs r01, r03",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "150,682 ÷ 399,949 × 100 (the 399,949 active primary care physician NPIs)",
      "expression": "(150682)/399949*100",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "provenance.md#registry-files",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d05",
      "kind": "derived",
      "entity": "Pediatrics: share of the 399,949 active primary care physician NPIs",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "18.8%",
      "number": 18.8,
      "unit": "%",
      "scope": "inputs r01, r04",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "75,143 ÷ 399,949 × 100 (the 399,949 active primary care physician NPIs)",
      "expression": "(75143)/399949*100",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "provenance.md#registry-files",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d06",
      "kind": "derived",
      "entity": "General Practice: share of the 399,949 active primary care physician NPIs",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "4.2%",
      "number": 4.2,
      "unit": "%",
      "scope": "inputs r01, r05",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "16,916 ÷ 399,949 × 100 (the 399,949 active primary care physician NPIs)",
      "expression": "(16916)/399949*100",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "provenance.md#registry-files",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d07",
      "kind": "derived",
      "entity": "Top 3 by Primary care physicians per practice state combined (CA, TX and FL)",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "99,349 NPIs",
      "number": 99349.0,
      "unit": "NPIs",
      "scope": "inputs r15, r16, r17",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "46,273 + 27,081 + 25,995",
      "expression": "46273+27081+25995",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d08",
      "kind": "derived",
      "entity": "Top 3 by Primary care physicians per practice state: combined share of the 399,949 active primary care physician NPIs",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "24.8%",
      "number": 24.8,
      "unit": "%",
      "scope": "inputs r01, r15, r16, r17",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "99,349 ÷ 399,949 × 100 (the 399,949 active primary care physician NPIs)",
      "expression": "(46273+27081+25995)/399949*100",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "provenance.md#registry-files",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d09",
      "kind": "derived",
      "entity": "Top 5 by Primary care physicians per practice state combined (CA, TX, FL, NY and PA)",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "142,999 NPIs",
      "number": 142999.0,
      "unit": "NPIs",
      "scope": "inputs r15, r16, r17, r18, r19",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "46,273 + 27,081 + 25,995 + 25,078 + 18,572",
      "expression": "46273+27081+25995+25078+18572",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d10",
      "kind": "derived",
      "entity": "Top 5 by Primary care physicians per practice state: combined share of the 399,949 active primary care physician NPIs",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "35.8%",
      "number": 35.8,
      "unit": "%",
      "scope": "inputs r01, r15, r16, r17, r18, r19",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "142,999 ÷ 399,949 × 100 (the 399,949 active primary care physician NPIs)",
      "expression": "(46273+27081+25995+25078+18572)/399949*100",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "provenance.md#registry-files",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d11",
      "kind": "derived",
      "entity": "The 15 listed by Primary care physicians per practice state combined",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "261,254 NPIs",
      "number": 261254.0,
      "unit": "NPIs",
      "scope": "inputs r15, r16, r17, r18, r19, r20, r21, r22, r23, r24, r25, r26, r27, r28, r29",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "sum of the 15 listed figures",
      "expression": "46273+27081+25995+25078+18572+16924+14305+14170+11862+11641+10806+10470+10159+9869+8049",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d12",
      "kind": "derived",
      "entity": "Outside the 15 listed by Primary care physicians per practice state (the 399,949 active primary care physician NPIs)",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "138,695 NPIs",
      "number": 138695.0,
      "unit": "NPIs",
      "scope": "inputs r01, r15, r16, r17, r18, r19, r20, r21, r22, r23, r24, r25, r26, r27, r28, r29",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "399,949 − 261,254",
      "expression": "399949-(46273+27081+25995+25078+18572+16924+14305+14170+11862+11641+10806+10470+10159+9869+8049)",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "provenance.md#registry-files",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d13",
      "kind": "derived",
      "entity": "Outside the 15 listed by Primary care physicians per practice state: share of the 399,949 active primary care physician NPIs",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "34.7%",
      "number": 34.7,
      "unit": "%",
      "scope": "inputs r01, r15, r16, r17, r18, r19, r20, r21, r22, r23, r24, r25, r26, r27, r28, r29",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "138,695 ÷ 399,949 × 100 (the 399,949 active primary care physician NPIs)",
      "expression": "(399949-(46273+27081+25995+25078+18572+16924+14305+14170+11862+11641+10806+10470+10159+9869+8049))/399949*100",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "provenance.md#registry-files",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d14",
      "kind": "derived",
      "entity": "Outside the top 5 by Primary care physicians per practice state (the 399,949 active primary care physician NPIs)",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "256,950 NPIs",
      "number": 256950.0,
      "unit": "NPIs",
      "scope": "inputs r01, r15, r16, r17, r18, r19",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "399,949 − 142,999",
      "expression": "399949-(46273+27081+25995+25078+18572)",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "provenance.md#registry-files",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d15",
      "kind": "derived",
      "entity": "Outside the top 5 by Primary care physicians per practice state: share of the 399,949 active primary care physician NPIs",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "64.2%",
      "number": 64.2,
      "unit": "%",
      "scope": "inputs r01, r15, r16, r17, r18, r19",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "256,950 ÷ 399,949 × 100 (the 399,949 active primary care physician NPIs)",
      "expression": "(399949-(46273+27081+25995+25078+18572))/399949*100",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "provenance.md#registry-files",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d16",
      "kind": "derived",
      "entity": "The 10 outside the top 5 by Primary care physicians per practice state combined",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "118,255 NPIs",
      "number": 118255.0,
      "unit": "NPIs",
      "scope": "inputs r20, r21, r22, r23, r24, r25, r26, r27, r28, r29",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "sum of the 10 smaller figures",
      "expression": "16924+14305+14170+11862+11641+10806+10470+10159+9869+8049",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d17",
      "kind": "derived",
      "entity": "The 10 outside the top 5 by Primary care physicians per practice state: combined share of the 399,949 active primary care physician NPIs",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "29.6%",
      "number": 29.6,
      "unit": "%",
      "scope": "inputs r01, r20, r21, r22, r23, r24, r25, r26, r27, r28, r29",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "118,255 ÷ 399,949 × 100 (the 399,949 active primary care physician NPIs)",
      "expression": "(16924+14305+14170+11862+11641+10806+10470+10159+9869+8049)/399949*100",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "provenance.md#registry-files",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d18",
      "kind": "derived",
      "entity": "Jurisdictions outside the 15 listed practice states",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "36 of 51 jurisdictions (50 states and DC), not included in this comparison",
      "number": 36,
      "unit": "",
      "scope": "inputs r15, r16, r17, r18, r19, r20, r21, r22, r23, r24, r25, r26, r27, r28, r29",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "51 jurisdictions (50 states and DC) − 15 listed",
      "expression": "51-15",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d19",
      "kind": "derived",
      "entity": "Primary care physician NPI records last updated five or more years before 1 October 2026",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "211,521 NPI records",
      "number": 211521.0,
      "unit": "NPI records",
      "scope": "inputs r33, r34",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "136,126 + 75,395",
      "expression": "136126+75395",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d20",
      "kind": "derived",
      "entity": "Share of primary care physician NPI records last updated five or more years before 1 October 2026",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "52.9%",
      "number": 52.9,
      "unit": "%",
      "scope": "inputs r01, r33, r34",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "211,521 ÷ 399,949 × 100 (the 399,949 active primary care physician NPI records)",
      "expression": "(136126+75395)/399949*100",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "provenance.md#registry-files",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d21",
      "kind": "derived",
      "entity": "Primary care physician NPI records last updated within five years of 1 October 2026",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "188,428 NPI records",
      "number": 188428.0,
      "unit": "NPI records",
      "scope": "inputs r30, r31, r32",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "71,740 + 59,330 + 57,358",
      "expression": "71740+59330+57358",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "https://download.cms.gov/nppes/NPI_Files.html",
      "observed_at": "2026-09-13",
      "fixture": false
    },
    {
      "id": "d22",
      "kind": "derived",
      "entity": "Share of primary care physician NPI records last updated within five years of 1 October 2026",
      "attribute": "Derived figure",
      "scenario": "",
      "value": "47.1%",
      "number": 47.1,
      "unit": "%",
      "scope": "inputs r01, r30, r31, r32",
      "input_price_scope": "",
      "scenario_scope": "",
      "formula": "188,428 ÷ 399,949 × 100 (the 399,949 active primary care physician NPI records)",
      "expression": "(71740+59330+57358)/399949*100",
      "source_owner": "Provyx aggregation of the CMS NPPES monthly file (September 2026 release, records to 13 September 2026)",
      "source_url": "provenance.md#registry-files",
      "observed_at": "2026-09-13",
      "fixture": false
    }
  ]
}