Healthcare organizations in the NPI registry
Each profile gathers the active organization (NPI-2) records that share one legal business name in the CMS NPPES full file for September 2026 (records through 13 Sep 2026): how many there are, where they are, their provider taxonomies and when NPPES last updated them. Organizations are ranked by practice-location rows, counting each record's primary practice address and its secondary practice locations.
The ranking counts legal names, not corporate families. Retailers that register each store under one name rank high; a company that files under several legal names, such as Walmart Stores East LP and Walmart Inc, appears once for each. NPPES has no ownership, size or quality data, and the profiles add none. Deactivated NPIs are excluded because NPPES removes their names. The NPI Staleness Report explains the last-update measure.
Largest organizations by practice-location rows
| Organization (legal name) | Location rows | Distinct locations | NPI-2 records | States and territories | Last NPPES update 5+ years ago |
|---|---|---|---|---|---|
| Walgreen Co. | 11,138 | 10,392 | 11,124 | 52 | 15.2% |
| Walmart Stores East LP | 4,677 | 3,215 | 4,677 | 35 | 9.5% |
| Costco Wholesale Corporation | 1,917 | 739 | 1,917 | 49 | 56.2% |
| Luxottica Of America Inc | 1,855 | 1,836 | 1,855 | 52 | 65.4% |
| Walmart Inc | 1,390 | 1,295 | 1,390 | 19 | 1.1% |
| National Vision Inc | 1,283 | 1,261 | 1,283 | 48 | 70.8% |
| Cvs Pharmacy Inc | 1,234 | 1,232 | 1,234 | 11 | 92.3% |
| Publix Super Markets Inc | 1,169 | 1,163 | 1,167 | 4 | 0.6% |
| Total Renal Care Inc | 969 | 957 | 967 | 39 | 22.9% |
| Genoa Healthcare LLC | 831 | 826 | 831 | 49 | 1.8% |
Linked names have a profile. Location rows count each record's primary practice address plus its secondary practice locations; distinct locations are unique street-address and ZIP pairs.
Other profiles
- Novant Health Medical Group, LLC: 546 NPI-2 records, 439 locations (ranked 25th by practice-location rows; its records are mostly physician taxonomies)
Sources and method
Source: CMS NPPES Data Dissemination, full replacement monthly file V.2 for September 2026 (records through 13 Sep 2026). Organizations are grouped by legal business name, upper-cased with punctuation removed; deactivated NPIs are excluded. The share with a last NPPES update 5+ years ago counts records whose last-update date is before 1 Oct 2021, measured as of 1 Oct 2026. Profiles are refreshed with each monthly NPPES release.