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 183 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. Harriet OngondoColton, CA 923241700778636
  2. Mercy Ongubo, REGISTERED NURSESacramento, CA 958341962112292
  3. Leah OnsgardLoma Linda, CA 923501922933829
  4. Veronica Ontaneda AgueroCosta Mesa, CA 926271134952401
  5. Nicole OntiverosMira Loma, CA 917521710368964
  6. Chinwe OnukaegbeLoma Linda, CA 923571740103134
  7. Marvellous OnuohaSan Diego, CA 921231891584819
  8. Nehita Onwubuya, RNSan Diego, CA 921011306674072
  9. Rose OnyeagochaPittsburg, CA 945651497051346
  10. Leaticia Onyeise, RNSan Diego, CA 921011992079826
  11. Ogonna OnyemataMoreno Valley, CA 925551780492041
  12. Chanette OnyoyoRancho Cucamonga, CA 917011780474890
  13. Yemon Oo, RNSan Mateo, CA 944031356691281
  14. Annamma Oommen, RNNorwalk, CA 906501972672343
  15. Karla Oparko, RNSacramento, CA 958251336486505
  16. Katrina OpenaLa Puente, CA 917441447010574
  17. Christiana Opoku, RNEastvale, CA 928801942823539
  18. Kofi Opoku-AbabioFresno, CA 937211508085507
  19. Marissa OprayMonterey, CA 939401780554923
  20. Andrea Oquendo, RNSan Francisco, CA 941091518884295
  21. Jennifer Orallo, RNOceanside, CA 920541134428436
  22. Roberto Orbeta, RNSacramento, CA 958201548506462
  23. Delia Ordaz, RNStockton, CA 952021003094418
  24. Noemi OrdonaColton, CA 923241679926281
  25. Giulianna OrdonezFontana, CA 923371902339435
  26. Ernie Orellana, RNWest Hollywood, CA 900481598688210
  27. Jenaye OrellanaSanta Ana, CA 927011669090759
  28. Kara-Marie Orellana, RNLos Angeles, CA 900051013792233
  29. Megan Orestano, RNSan Diego, CA 921281710524814
  30. Cherechi OrjiColton, CA 923241770271132
  31. Edwina Orji, LVNSacramento, CA 958171669180170
  32. Catherine Orlando, R.N.Santa Ana, CA 927011407015738
  33. Alan Orme, FNPFresno, CA 937201437215027
  34. Carmelita OrnelasColton, CA 923241902461460
  35. Leticia Ornelas, RNSan Jose, CA 951261114191533
  36. Linda Oronoz, RN, PHNSanta Ana, CA 927061558541961
  37. Esosa OronsayeColton, CA 923241962219634
  38. Veronica Oropeza, RNDavis, CA 956161639946361
  39. Julia Orosco, R.N.Santa Maria, CA 934581821398306
  40. Belinda Orozco, RNTustin, CA 927821285334557
  41. Elizabeth Orr, RNOxnard, CA 930361952181968
  42. Lisa Orr, RNEureka, CA 955011275119497
  43. Rachel Orr, RN, PHNFairfield, CA 945341619526787
  44. Cora OrrettLong Beach, CA 908021578112447
  45. Emma OrrinBrea, CA 928211639838568
  46. Michelle Orsburn, R.N.San Diego, CA 921131801954128
  47. Amy Ortega, RNSan Ramon, CA 945831356950976
  48. Danika Ortega, RNGarden Grove, CA 928431619543683
  49. Erianthe OrtegaPomona, CA 917671154164945
  50. Janet OrtegaPomona, CA 917681700427655

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.