NPPES file of Aug 9, 2026

Nurse Practitioner in California

8,223 NPPES records list nurse practitioner with a practice address in California, 21 per 100,000 residents, the 41st highest rate of 51. Stanford and Los Angeles have the most; each record links to the provider's NPI and the California license search. Page 110 of 165.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 363L00000X · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Stanford has the most, 572

  1. Stanford572
  2. Los Angeles520
  3. San Diego458
  4. San Francisco425
  5. Palo Alto318

Nurse Practitioner records in California

  1. Jonathan OlsonSan Francisco, CA 941031356612071
  2. Julie Olson, NPCarlsbad, CA 920081265405401
  3. Natalya Olson, FNPNewport Beach, CA 926601780314492
  4. Roger OlsonSan Leandro, CA 945781235367020
  5. Sheryl OlsonOrange, CA 928681912302852
  6. Lindsay Olson Mack, NPCoronado, CA 921181528330495
  7. Abimbola Olusanya, DNP, FNP, PMHNP-BCElk Grove, CA 956241811958127
  8. Ruth Olusoto, FNPLos Angeles, CA 900271003688193
  9. Joan Omahony, NPSan Francisco, CA 941431588816656
  10. Robert Omalley, NPSacramento, CA 958171609872001
  11. Mery Oman, NURSE PRACTITIONEROrange, CA 928681417212465
  12. Omaka Omeze, RN, NP, PMHNPLos Angeles, CA 900121316653280
  13. Egbebalakhamen Omoregie, NPOakland, CA 946021962015701
  14. Hulya Omran, DNPSan Diego, CA 921031881929925
  15. Devi Oneill, NPSanta Cruz, CA 950601225141567
  16. Teresa Oneill, NPSanta Maria, CA 934581144887530
  17. Joshua OngOrange, CA 928681659033819
  18. Lilian Ongeri, FNP-C, PMHNPCarmichael, CA 956081699366815
  19. Ashley OngjocoSacramento, CA 958231366801193
  20. Angela Onuegbulem, NPDuarte, CA 910101275220295
  21. Rufina OnumajuruBakersfield, CA 933121922760321
  22. Faith OnwukaLos Angeles, CA 900291962976456
  23. Patience Onyegbule, NPSan Diego, CA 921311265717110
  24. Emmanuel OnyweraSan Francisco, CA 941431821461286
  25. Agnes OparaWest Hollywood, CA 900691447865753
  26. Olachi Opara, FNPBeverly Hills, CA 902111164858494
  27. Susan Opas, NPWoodland Hills, CA 913671134245376
  28. Davis Openda, N.P.Modesto, CA 953551497147409
  29. Rose OpeneConcord, CA 945211437921160
  30. Grace Oppenheim, NPStanford, CA 943051013355411
  31. Sarah Oppenheim, NPPalo Alto, CA 943041649606518
  32. Eva Oppong, NPNorth Hollywood, CA 916051558695791
  33. Kayla OrateTustin, CA 927801457234783
  34. Adebisi Orija, NP-CFresno, CA 937011992047138
  35. Uchenna Orji, FNP-CMoreno Valley, CA 925531457770836
  36. Shelly Orloff, NPStanford, CA 943051093900995
  37. Marilyn Orlova-Zitzer, FNP, CRNFACorte Madera, CA 949251114922465
  38. Gabriela Oro, NPPalo Alto, CA 943051043883820
  39. Paul Orourke Babb, FNPOroville, CA 959651033240494
  40. Elizabeth Orozco, FNPSan Jose, CA 951261396469003
  41. Irene Orozco, NPBerkeley, CA 947051114553419
  42. Natalia Orozco, FNPBurney, CA 960131811288129
  43. Emmanuel Orozco Santana, NPLos Angeles, CA 900951760280192
  44. Maritza Orozco-Robles, FNP-CWasco, CA 932801245252899
  45. Lynne Orr, NPCastro Valley, CA 945461235698713
  46. Arlene Ortega, NPSan Diego, CA 921031740708700
  47. Elizabeth Ortega, NPSanta Ana, CA 927041326194689
  48. Jose Ortega, NPVictorville, CA 923951043697378
  49. Leticia Ortega, NPRiverside, CA 925061427745447
  50. Yessenia Ortega Ramirez, NPLawndale, CA 902601083547285

Source: CMS NPPES, primary taxonomy 363L00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 41 of 51 per resident

  1. Alaska22
  2. Colorado21
  3. New Jersey21
  4. California21
  5. Louisiana20
  6. Maryland20
  7. 50 states and D.C.29

Source: CMS NPPES, primary taxonomy 363L00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

65.3% of these records appear in a Medicare file, against 73.4% nationally

A Medicare file here is Part D prescribing (2024), a MIPS score (2023), an Open Payments record (2024) or Medicare group billing (CMS Doctors and Clinicians). A record outside them may still see patients: these files cover Medicare only.

  1. California65.3%
  2. United States73.4%

Nurse Practitioner records in California, measured

  • In a Medicare file5,368 of 8,223 · 65.3% here, 73.4% nationally
  • In the CMS Doctors and Clinicians file3,427 · 41.7% here, 57.4% nationally
  • Not updated in five years or more3,696 · 44.9% here, 44.6% nationally
  • Median graduation year2017 · the 3,425 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 363L00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

8,223 NPPES records list nurse practitioner (363L00000X) as their primary taxonomy with a practice address in California: 21 per 100,000 residents against 29 nationally (50 states and D.C.). Stanford has 572 of them (7%).

A record is a registration a provider made and keeps up to date: it shows neither that the provider is licensed nor that they still practice there. The state's own license search is the check.

States with a similar number

  1. Florida8,844
  2. Illinois4,892
  3. Texas4,825
  4. North Carolina4,524

States with a similar rate per 100,000

  1. New Jersey21.1
  2. Colorado21.4
  3. Alaska21.5
  4. Louisiana20.4

The largest states

  1. Florida8,844
  2. Illinois4,892
  3. Texas4,825
  4. North Carolina4,524
  5. Ohio4,254

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy; 2023 Census population estimates. A registry record is not a license.

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.