Top 15 states by organizations with this primary specialty. Based on 2,469 organization (NPI-2) records with a primary allergy and immunology taxonomy in the federal NPI Registry.
| Item | Count |
|---|---|
| California | 268 |
| Texas | 263 |
| Florida | 197 |
| New York | 190 |
| Pennsylvania | 108 |
| New Jersey | 99 |
| Illinois | 98 |
| Michigan | 96 |
| Maryland | 90 |
| Ohio | 81 |
| Virginia | 77 |
| Massachusetts | 76 |
| Georgia | 73 |
| Colorado | 55 |
| North Carolina | 53 |
Use this chart with credit to Immunologists.com. See the full chart library or the directory.
Sources
- NPPES NPI Registry (Centers for Medicare and Medicaid Services)
- Counts come from a November 2026 pull of the NPPES NPI Registry API, filtered to records whose primary taxonomy is allergy and immunology. Individual clinicians are NPI-1 records and organizations are NPI-2 records. Counts by practice location state.
