NPPES file of Aug 9, 2026

Specialist in California

5,749 NPPES records list specialist with a practice address in California, 15 per 100,000 residents, the 19th highest rate of 51. San Francisco and Los Angeles have the most; each record links to the provider's NPI and the California license search. Page 63 of 115.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 174400000X · method

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

San Francisco has the most, 666

  1. San Francisco666
  2. Los Angeles301
  3. Sacramento241
  4. San Diego207
  5. Oakland198

Specialist records in California

  1. Christine MarosticaLos Angeles, CA 900661386062149
  2. Leonard MarottaSan Francisco, CA 941031508201641
  3. Ian-Paolo MarquezSacramento, CA 958171740154020
  4. Irma MarquezLos Angeles, CA 900071518510023
  5. Jack Marquez, ATCMoreno Valley, CA 925511841495298
  6. Jonathan Marquez, M.A.San Diego, CA 921311649607870
  7. Jose Marquez CuevasOakland, CA 946051144040619
  8. Jenell MarquisBurlingame, CA 940101811499395
  9. Tonia Marralle, M.D.Newport Beach, CA 926631558460220
  10. Agata Marriott, M.D.Del Mar, CA 920141699886564
  11. Alan MarroquinSacramento, CA 958171457147209
  12. Rafael Marroquin, 989057Riverside, CA 925011396960134
  13. Tony MarseyRocklin, CA 957651285970491
  14. Carol Marshall, M.D.Sacramento, CA 958171265414908
  15. Hannah MarshallAlta, CA 957011649451469
  16. Kelly MarshallSan Rafael, CA 949031649688128
  17. Paige Marshall, RADTSoquel, CA 950731265950265
  18. Valerie Marshall, MBA GERONTOLOGYHesperia, CA 923451396594917
  19. Theodore Marshburn, M.D.Whittier, CA 906031467546937
  20. Nicholas Marsico, M.D.Los Angeles, CA 900131992876155
  21. Bianca MartinSan Diego, CA 921231215264106
  22. Clester MartinBakersfield, CA 933041134803679
  23. Julian MartinSanta Ana, CA 927011487260758
  24. Linda Martin, MEDICAL SKIN CARE SPSan Pedro, CA 907321114251725
  25. Michelle MartinAuburn, CA 956031891916805
  26. Rod MartinAlameda, CA 945021134543408
  27. Denise Martin-Sahim, AUDFairfield, CA 945331023182425
  28. Annabel MartinezSan Francisco, CA 941021487000865
  29. Aubrey MartinezUnion City, CA 945871750268199
  30. Cesar MartinezCorona, CA 928821174900195
  31. Katya MartinezBrea, CA 928211710341672
  32. Lene Martinez, M.D.Brawley, CA 922271396748059
  33. Marisa MartinezArcadia, CA 910061134086085
  34. Matthew MartinezRiverside, CA 925041720401615
  35. Mynor Martinez MirandaSacramento, CA 958171487582011
  36. Liliana Martinez SandovalDublin, CA 945681841135712
  37. Brenda Martinez-PuenteSacramento, CA 958171356238927
  38. Glenn Martinson, CMTSan Jose, CA 951121912264847
  39. Noha MarwanCosta Mesa, CA 926261639771835
  40. Grant Masaoka, M.D.Anaheim, CA 928011780677120
  41. Bijan Mashouf, M.D.Laguna Niguel, CA 926771639308620
  42. Samuel Masket, M.D.Los Angeles, CA 900671750303111
  43. Kenneth Mason, M.D.Anaheim, CA 928021891841177
  44. Seth Matarasso, MDSan Francisco, CA 941021992882948
  45. Jaime MateusHawthorne, CA 902501225972011
  46. Michelle Mather, CMTMammoth Lakes, CA 935461467697581
  47. Richard Matkaluk, M.D.Murrieta, CA 925621104926229
  48. Salathiel Matos, P.A.Pasadena, CA 911061659444792
  49. Shigeyuki MatsukiOrange, CA 928661679283931
  50. Kealani Matsumiya-Delay, CMTOrange, CA 928661912077561

Source: CMS NPPES, primary taxonomy 174400000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 19 of 51 per resident

  1. Massachusetts16
  2. West Virginia15
  3. Maryland15
  4. California15
  5. Minnesota15
  6. Delaware13
  7. 50 states and D.C.18

Source: CMS NPPES, primary taxonomy 174400000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

29.6% of these records appear in a Medicare file, against 17.0% 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. California29.6%
  2. United States17.0%

Specialist records in California, measured

  • In a Medicare file1,704 of 5,749 · 29.6% here, 17.0% nationally
  • In the CMS Doctors and Clinicians file1,076 · 18.7% here, 11.1% nationally
  • Not updated in five years or more4,403 · 76.6% here, 77.3% nationally
  • Median graduation year1989 · the 1,075 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 174400000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

5,749 NPPES records list specialist (174400000X) as their primary taxonomy with a practice address in California: 15 per 100,000 residents against 18 nationally (50 states and D.C.). San Francisco has 666 of them (12%).

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. Florida2,685
  2. Washington2,609
  3. Pennsylvania2,031
  4. Texas1,716

States with a similar rate per 100,000

  1. Minnesota14.6
  2. Maryland15.2
  3. West Virginia15.4
  4. Massachusetts15.7

The largest states

  1. New York22,636
  2. Florida2,685
  3. Washington2,609
  4. Pennsylvania2,031
  5. Texas1,716

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.