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 152 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. Leticia Martinez, RNPorterville, CA 932571841166725
  2. Leticia Martinez, LVNEureka, CA 955011407203102
  3. Liliana Martinez, RNMariposa, CA 953381023700606
  4. Michael MartinezTemecula, CA 925901639097231
  5. Michelle Martinez, RNTorrance, CA 905021144864349
  6. Ofelia MartinezSantee, CA 920711437545084
  7. Perla MartinezGardena, CA 902481386513992
  8. Robert MartinezSacramento, CA 958251922763457
  9. Rosario Martinez, RNOakland, CA 946011215158183
  10. Sandra MartinezSan Mateo, CA 944031487494357
  11. Victoria MartinezWheatland, CA 956921417746892
  12. Virginia Martinez, R.N.Whittier, CA 906021124475181
  13. William Martinez, RNLong Beach, CA 908101376199463
  14. Xiomara Martinez, RNSan Diego, CA 921341336833102
  15. Nancy Martinez Lazcano, RNBakersfield, CA 933011508581984
  16. Ocotlan Martinez Libreros, RNRohnert Park, CA 949281386512028
  17. Cristina Martinez LucasCampbell, CA 950081982520029
  18. Daisy Martinez Siles, MSN, RN, FNPOakland, CA 946011265120323
  19. Vanessa Martinez-Hernandez, RNMountain View, CA 940401689498529
  20. Carolina Martinez-LanderosDunnigan, CA 959371972478261
  21. Christie Martino, RNColton, CA 923241104428283
  22. Krystyan MartinoFresno, CA 937031356268353
  23. Megan Martino, ADNPlacentia, CA 928701386942613
  24. Lorelie Shalaine Martir, RNSan Mateo, CA 944011174374490
  25. Caresse Martucci, RNLong Beach, CA 908101114513231
  26. Susan MartynFresno, CA 937211164641304
  27. Lisa Marutani, NPCorte Madera, CA 949491770776957
  28. Katherine Marx, RNSan Francisco, CA 941091679496962
  29. Daniel Maryanov, RNLos Angeles, CA 900261821462128
  30. Laquana Maryland, RNElk Grove, CA 957571144937293
  31. Fernando Marzorati, REGISTERED NURSESan Francisco, CA 941101104981620
  32. Marcy Maschak, RNSan Diego, CA 921021457486243
  33. Francis Martin Mase, RNSan Diego, CA 921581346852837
  34. Tanida Maselli, RNSan Francisco, CA 941031467906040
  35. Ella MaserLa Jolla, CA 920371326906058
  36. Valerie Maseuli, RNEl Monte, CA 917311619426426
  37. Shabnam MashinchiEncino, CA 914361851270318
  38. Marie Sol Masigan, RNBurbank, CA 915051891319406
  39. Sylve Masih, DNP-RNPalo Alto, CA 943041013749373
  40. Elizabeth MasiniFresno, CA 937211861611006
  41. Claro MasisadoRiverside, CA 925031952776668
  42. Joana Paula MaskeSan Francisco, CA 941071023887494
  43. Jessica Maslan, BSN, RNYuba City, CA 959911811465982
  44. Sharon Maslow, R.N.San Luis Obispo, CA 934011053935718
  45. Diane Mason, R.N.Anaheim, CA 928081932402559
  46. Donna Mason, REGITERED NURSESan Francisco, CA 941161336385434
  47. Carole Mason-LouxModesto, CA 953561629164553
  48. Sidonie Massa TuecheRoseville, CA 957471841073046
  49. Justin MassaroSacramento, CA 958171285571851
  50. Haroon MasseyColton, CA 923241922272590

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.