NPPES file of Aug 9, 2026

Orthopaedic Surgery Physician in California

2,276 NPPES records list orthopaedic surgery physician with a practice address in California, 5.8 per 100,000 residents, the 49th highest rate of 51. Los Angeles and San Diego have the most; each record links to the provider's NPI and the California license search. Page 46 of 46.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207X00000X · method

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

Los Angeles has the most, 187

  1. Los Angeles187
  2. San Diego154
  3. San Francisco121
  4. Sacramento79
  5. La Jolla55

Orthopaedic Surgery Physician records in California

  1. Andrew Yun, MDBeverly Hills, CA 902111083674410
  2. Amit Zabtani, MDSanta Monica, CA 904041326879131
  3. Lacey Zack, M.D.Los Angeles, CA 900171124315916
  4. Musa Zaid, MDDaly City, CA 940151457732034
  5. Leo Zalikha, MDLong Beach, CA 908061255994562
  6. Mohammad Zalzaleh, DOFountain Valley, CA 927081235792276
  7. Matthew Zapf, MD, MSCPalm Springs, CA 922621891115457
  8. Jeffrey Zarin, MDSanta Monica, CA 904041588678148
  9. Raymond Zarins, MDRedlands, CA 923741194747014
  10. John Zauner, MDPalo Alto, CA 943041447296934
  11. Erik Zeegen, M.D.Tarzana, CA 914361427039437
  12. Steven Zeitzew, M.D.Los Angeles, CA 900461013920859
  13. Jason Zemanovic, MDRoseville, CA 956611629156393
  14. Jianghui Zhang, M.D.San Francisco, CA 941081508020751
  15. Keri Zickuhr, M.D.Torrance, CA 905051891993762
  16. Melissa Zimel, MDSan Francisco, CA 941431245493147
  17. Andre Zimmerman, M.D.Ventura, CA 930031326200429
  18. Thomas Zink, MDSanta Monica, CA 904041518581420
  19. Lewis Zionts, M.D.Los Angeles, CA 900071689766867
  20. Jacob Zipperstein, MDSanta Rosa, CA 954031043770167
  21. James Zmolek, M.D.Santa Barbara, CA 931101417960154
  22. Stephan Zmugg, M.D.Oakland, CA 946111396030680
  23. Gary Zohman, MDOrange, CA 928681396814000
  24. Stephen Zoller, M.D.Riverside, CA 925051831517408
  25. Anthony Zoppi, M.D.Marina Del Rey, CA 902921972503431
  26. Matthew Zwerling, M.D.Cotati, CA 949311033343330

Source: CMS NPPES, primary taxonomy 207X00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 49 of 51 per resident

  1. Tennessee6.6
  2. Florida6.5
  3. Arizona6.2
  4. California5.8
  5. Nevada5.1
  6. Texas5.0
  7. 50 states and D.C.7.4

Source: CMS NPPES, primary taxonomy 207X00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

74.0% of these records appear in a Medicare file, against 76.5% 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. California74.0%
  2. United States76.5%

Orthopaedic Surgery Physician records in California, measured

  • In a Medicare file1,684 of 2,276 · 74.0% here, 76.5% nationally
  • In the CMS Doctors and Clinicians file1,347 · 59.2% here, 62.5% nationally
  • Not updated in five years or more1,493 · 65.6% here, 56.8% nationally
  • Median graduation year2003 · the 1,347 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207X00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

2,276 NPPES records list orthopaedic surgery physician (207X00000X) as their primary taxonomy with a practice address in California: 5.8 per 100,000 residents against 7.4 nationally (50 states and D.C.). Los Angeles has 187 of them (8%).

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. Texas1,514
  2. Florida1,470
  3. New York1,339
  4. Pennsylvania1,253

States with a similar rate per 100,000

  1. Arizona6.2
  2. Nevada5.1
  3. Tennessee6.6
  4. Alabama6.7

The largest states

  1. Texas1,514
  2. Florida1,470
  3. New York1,339
  4. Pennsylvania1,253
  5. Illinois995

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.