NPPES file of Aug 9, 2026

Registered Nurse in California

13,506 NPPES records list registered nurse with a practice address in California, 35 per 100,000 residents, the 30th highest rate of 51. San Diego and San Francisco have the most; each record links to the provider's NPI and the California license search. Page 182 of 271.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 163W00000X · method

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

San Diego has the most, 1,223

  1. San Diego1,223
  2. San Francisco625
  3. Los Angeles526
  4. Sacramento508
  5. Fresno500

Registered Nurse records in California

  1. Juramay OlivaEl Cajon, CA 920201730943994
  2. Vicky OlivaAmerican Canyon, CA 945031629772736
  3. Kira Olivares, RNPalo Alto, CA 943041114678018
  4. Antionette Olivarez, RNTarzana, CA 913561679016133
  5. Risa Olivarez, RNBurbank, CA 915051730777285
  6. Ellen OliveiraCulver City, CA 902321902638018
  7. Kirbie OliveiraFresno, CA 937031811220049
  8. Alison Oliver, RNDavis, CA 956161316672165
  9. Brandy Oliver, RNBakersfield, CA 933081144755034
  10. Dorette Olivera, RN., BSN., PHN,INPTorrance, CA 905021093054173
  11. Teresa Oliveri, RNArcata, CA 955211952858623
  12. Christian Hansen Oliverio, BSN,RNWilton, CA 956931881143873
  13. Diana Oliveros, RNSalinas, CA 939011306029202
  14. Diana OlivoLos Angeles, CA 900951801345392
  15. Yosemite Olivo-AlfaroOxnard, CA 930361669338398
  16. Michelle Ollada Alipio, RNTustin, CA 927821861274094
  17. Analyn Olmos, RNLong Beach, CA 908051386789592
  18. Brenda Olmos, RNRiverside, CA 925071609614270
  19. Gloria Olmos, R.N.Martinez, CA 945531629459185
  20. Jose Olmos, R.N.Orange, CA 928661992862288
  21. Ramot OlowosagbaLong Beach, CA 908101376116947
  22. Lynne Olsen, PHNMarysville, CA 959011023298544
  23. Meghan OlsenVista, CA 920841396443669
  24. Aimee Olson, RNSacramento, CA 958201033474671
  25. Kathryn OlsonSanta Monica, CA 904051992463608
  26. Lisa Olson, RN, MNSan Diego, CA 921011497352314
  27. Teresa Olson, RNModesto, CA 953501912187493
  28. Maiella Olszanowski, RNSalinas, CA 939061932398674
  29. Betha OluloCerritos, CA 907031497678676
  30. Collet OluohaColton, CA 923241255968806
  31. Adetoun Olupitan, RNTemecula, CA 925911952983819
  32. Joan Olveda, RNSacramento, CA 958331659899649
  33. Annette OlveraLong Beach, CA 908101821732603
  34. Elena OmaryVallejo, CA 945911326174996
  35. Juliana OmejeColton, CA 923241114505385
  36. Evina OmenganChula Vista, CA 919131265813877
  37. Eunice Omoefe, REGISTERED NURSEPatton, CA 923691699464230
  38. Katheryn Omolon, RNPasadena, CA 911041952093288
  39. Diane Omoso, RNWoodland, CA 957761679456800
  40. Dana Onadja, R.N.Calabasas, CA 913021649693920
  41. Herminia Onate, R.N.El Cajon, CA 920201932537693
  42. Joseph Onate, PHN, RNSan Mateo, CA 944031174853980
  43. Mary Oneal, RNRedlands, CA 923731114158268
  44. Rosa Oneal, RNSan Diego, CA 921031730695156
  45. Elliza Marie Ong, CRNASan Francisco, CA 941101821273780
  46. Margaret OngSan Diego, CA 921291558235499
  47. Ringo George Ong, RNHayward, CA 945451003678012
  48. Victoria OngOakland, CA 946121467869560
  49. Willy Ong, RNElk Grove, CA 957581972327104
  50. Emma Ruth OngkingcoRiverside, CA 925011902629850

Source: CMS NPPES, primary taxonomy 163W00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 30 of 51 per resident

  1. Maryland40
  2. Arkansas40
  3. Oklahoma36
  4. California35
  5. Kansas34
  6. South Carolina33
  7. 50 states and D.C.44

Source: CMS NPPES, primary taxonomy 163W00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

2.5% of these records appear in a Medicare file, against 1.5% 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. California2.5%
  2. United States1.5%

Registered Nurse records in California, measured

  • In a Medicare file343 of 13,506 · 2.5% here, 1.5% nationally
  • In the CMS Doctors and Clinicians file146 · 1.1% here, 1.0% nationally
  • Not updated in five years or more7,263 · 53.8% here, 57.2% nationally
  • Median graduation year2018 · the 146 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 163W00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

13,506 NPPES records list registered nurse (163W00000X) as their primary taxonomy with a practice address in California: 35 per 100,000 residents against 44 nationally (50 states and D.C.). San Diego has 1,223 of them (9%).

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. Ohio9,656
  2. Texas8,921
  3. Washington5,708
  4. Michigan5,589

States with a similar rate per 100,000

  1. Kansas33.9
  2. Oklahoma35.9
  3. South Carolina32.8
  4. Vermont31.0

The largest states

  1. New York25,740
  2. Ohio9,656
  3. Texas8,921
  4. Washington5,708
  5. Michigan5,589

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.