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Kaiser Permanente physicians and nurse practitioners on the CMS clinician file
17,800 physicians and nurse practitioners bill Medicare under a Kaiser Permanente facility name, 1.8% of the 1,011,505 on the CMS Doctors and Clinicians file.
16,648 of them are physicians and 1,152 are nurse practitioners.
That is rank 1 of the 7 health systems whose facility names match cleanly enough to count.
This is a count of Medicare-enrolled clinicians carrying the system's facility name, not the system's headcount.
Source: ProfessionLens, September 2026. CMS Doctors and Clinicians national file, released 10 September 2026.
Kaiser Permanente on the clinician file
| Measure | Clinicians | Share of file |
|---|---|---|
| Physicians and nurse practitioners | 17,800 | 1.8% |
| Physicians | 16,648 | 2.3% |
| Nurse practitioners | 1,152 | 0.4% |
Shares are of 1,011,505 clinicians, 730,327 physicians and 281,178 nurse practitioners on the file.
Source: ProfessionLens, September 2026. CMS Doctors and Clinicians national file, released 10 September 2026.
The health systems counted
| Rank | Health system | Physicians and NPs | Physicians |
|---|---|---|---|
| 1 | Kaiser Permanente | 17,800 | 16,648 |
| 2 | Mayo Clinic | 7,387 | 5,945 |
| 3 | Cleveland Clinic | 6,136 | 4,448 |
| 4 | Sutter Health | 4,983 | 4,454 |
| 5 | Northwell Health | 4,761 | 3,929 |
| 6 | UPMC | 3,714 | 3,166 |
| 7 | Intermountain Health | 3,695 | 2,828 |
Systems are matched on the facility name CMS publishes. Systems whose clinicians enrol under practice names that do not carry the system name are not countable this way and are left out.
Source: ProfessionLens, September 2026. CMS Doctors and Clinicians national file, released 10 September 2026.
Cite this
ProfessionLens, Kaiser Permanente physicians and nurse practitioners on the CMS clinician file, September 2026, https://professionlens.com/health-systems/kaiser-permanente.