# Sources: Primary care physician email list: what NPPES shows

Every source behind the page's figures, one row per source: its public URL, when it was retrieved or checked, whether it is included, the rows it contributed after the stated filters and de-duplication, and the reason for every exclusion. Counts below a dataset's minimum group size are withheld. The figures themselves are aggregates; the methodology gives the exact queries.

<a id="registry-files"></a>

## Registry files

| Source | URL | Retrieved | Category | Status | Rows counted | Include/exclude reason |
|---|---|---|---|---|---|---|
| CMS NPPES monthly file, September 2026 release (records to 13 September 2026) | https://download.cms.gov/nppes/NPI_Files.html | 2026-09-13 | — | included | 587621 | included in every use |