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 153 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. Fay Massian, RNRedwood City, CA 940631568741981
  2. Gladis MassihiVan Nuys, CA 914051013622695
  3. Ella MastovWest Hills, CA 913071457874869
  4. Jeri Masuda, RNNapa, CA 945591003957473
  5. Mohammad Masum, RNTravis Afb, CA 945351215752407
  6. Jamillah MasutaSacramento, CA 958201023354735
  7. Daryl Mata, RNSan Francisco, CA 941331699615104
  8. Erika MataAlhambra, CA 918031548184047
  9. Gemaima Mata, R.NMurrieta, CA 925631174210801
  10. Guadalupe Mata, RNLoma Linda, CA 923571215695184
  11. Mia Carla Mata, RNFresno, CA 937271679493860
  12. Ofa Mataele, LVNEast Palo Alto, CA 943031952550634
  13. Lauren MatamorosPalo Alto, CA 943041972420362
  14. Laura Matanane, RN, BSNSan Diego, CA 921541326609652
  15. James Matejcek, R.NSanta Ana, CA 927051255777538
  16. Torrey MateljanSan Diego, CA 921031780490797
  17. Irene MateoHayward, CA 945451669621298
  18. Madelene MateoHayward, CA 945441588521199
  19. Jessica Mateo-Lorenzo, RNLos Angeles, CA 900261316773856
  20. Adriana MateosLos Angeles, CA 900021760804819
  21. Amanda Mathes, RNMurrieta, CA 925631396696183
  22. Julie MathewCosta Mesa, CA 926261225286156
  23. Maria Mathew, BSN, RN, PHNSan Francisco, CA 941171336067115
  24. Shereena MathewVacaville, CA 956871538799770
  25. Thresiamma MathewNorthridge, CA 913251033800024
  26. Christianna MathewsPalo Alto, CA 943011700426350
  27. Jane Mathews, RN, PMHCNS, NPPasadena, CA 911051376632471
  28. Jennifer Mathney, RNFerndale, CA 955361093288649
  29. Liana MathonGreenbrae, CA 949041497625727
  30. Coral Matich, RNCModesto, CA 953501932435716
  31. Richard Matiga, RNLos Angeles, CA 900201548781966
  32. Froilan Felipe Matondo, REGISTERED NURSESantee, CA 920711407116064
  33. Christina Matson, RNOrangevale, CA 956621710201686
  34. Joni MatsonSacramento, CA 958201033799085
  35. Akane MatsuuraOakland, CA 946121811304835
  36. Olivia MatsuyamaFresno, CA 937211669812491
  37. Jessica Matt, AGACNPSan Diego, CA 921031598637837
  38. Kristin Matteson, REGISTERED NURSESan Francisco, CA 941101356106017
  39. Nanda MattesonFresno, CA 937211649549890
  40. Elizabeth Matteucci, RNSan Jose, CA 951261063892941
  41. Diane Matthews, RN, PHNModesto, CA 953551437826153
  42. Julia Matthews, RNOrange, CA 928681225987035
  43. Linda MatthewsColton, CA 923241003174889
  44. Marilyn Matthews, RNLancaster, CA 935361780307694
  45. Melanie Matthews, RN IBCLCHuntington Beach, CA 926461760119556
  46. Siera Matthews, RNSan Diego, CA 921031780227363
  47. Andrea Mattson, RNChula Vista, CA 919111366781130
  48. Deborah MattsonEureka, CA 955011154756245
  49. Elizabeth Matusek-Bleecker, RN, PHNSan Francisco, CA 941121467315424
  50. Lilly Matveyenko, RNOrange, CA 928661629168174

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.