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 115 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. Thomas Zanetos, D.O.Hollister, CA 950231285676312
  2. Patricia ZappiaGrand Terrace, CA 923131528230869
  3. Amer Zarka, M.D.Santa Ana, CA 927071629096664
  4. Myint Zaw, M.D.Fresno, CA 937101063527463
  5. Robert Zedelis, M.D.Eureka, CA 955011083614549
  6. Curtis Zeilenga, MA, ATCIndio, CA 922031235105867
  7. Paola ZeladaDublin, CA 945681942038781
  8. Jeffrey ZellnerCastro Valley, CA 945461104020478
  9. Stuart Zeman, MDLafayette, CA 945491821101098
  10. Mark ZernSacramento, CA 958171275510687
  11. Eleonore Zetrenne, MDMission Viejo, CA 926911023140654
  12. Elizabeth Zettersten, MDSan Rafael, CA 949031194035287
  13. Xiao Lei ZhanSan Francisco, CA 941021184079725
  14. Flora ZhangSacramento, CA 958171093646812
  15. Jian Ting ZhangSan Francisco, CA 941071962991455
  16. Kan ZhangOakland, CA 946121396161857
  17. Shuya ZhangBerkeley, CA 947101205567500
  18. Sylvia ZhangSan Francisco, CA 941031598034423
  19. Ying Zhang, M.D.San Jose, CA 951281093803850
  20. Yinuo ZhangSan Francisco, CA 941101477232569
  21. Yu Zhang, PHDModesto, CA 953501487795241
  22. Chonghao Zhao, M.D., PHD, DABMASan Gabriel, CA 917761902930019
  23. Guohua Zhao, M.D., PH.D.Orange, CA 928681831370220
  24. Cristina ZhengSan Diego, CA 921111790232635
  25. Hua Zheng, M.D.Monterey Park, CA 917551053537621
  26. Yan Hong ZhuSan Francisco, CA 941021336921774
  27. Zhi Jiar Zhuang, M.D.San Francisco, CA 941181760464648
  28. Ulrike Ziegner, MD PHDRedondo Beach, CA 902771407867203
  29. Gul Zikria, MDLake Forest, CA 926301275565731
  30. Benjamin Zimmerman, MS BEHAVIORAL PSYCHLos Altos, CA 940241790806099
  31. John Zimmermann, M.D.Napa, CA 945581558380154
  32. Edmond Zingaro, M.D.San Francisco, CA 941091245386200
  33. Christopher ZinggLaguna Woods, CA 926371497885446
  34. Tiffany ZinkWillows, CA 959881386762573
  35. David Zinke, M.D.West Covina, CA 917901922185743
  36. Hector Ziperovich, M.D.Culver City, CA 902321679612295
  37. Charles Zipkin, M.D.Truckee, CA 961611063418309
  38. Christopher Zito, M.D., FCCP, INC.Panorama City, CA 914021285786343
  39. Latif Ziyar, M.D.Fresno, CA 937201881699171
  40. Laurel Zober, M.D.Downey, CA 902411184708745
  41. Arus Zograbyan, M.D.Los Angeles, CA 900271548363641
  42. Branislav ZoranSan Francisco, CA 941021568884468
  43. Rosa ZorrillaSan Francisco, CA 941101215792734
  44. Christo Zouves, M.D.Foster City, CA 944041356408140
  45. Mirjana Zubovic-Marusa, M.D.Irvine, CA 926181073511911
  46. Clodoaldo ZunigaSan Francisco, CA 941021285058628
  47. Victoria Zvonkina, M.D.San Francisco, CA 941091922208172
  48. Brad Zwahlen, M.D.Berkeley, CA 947051508878406
  49. Stephen ZweigRancho Mirage, CA 922701265605281

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.