NPPES file of Aug 9, 2026

Optometrist in California

8,308 NPPES records list optometrist with a practice address in California, 21 per 100,000 residents, the 17th 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 110 of 167.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 152W00000X · 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, 371

  1. Los Angeles371
  2. San Diego342
  3. San Francisco295
  4. San Jose207
  5. Sacramento176

Optometrist records in California

  1. Timothy Olinger, O.D.Lawndale, CA 902601952411365
  2. Linsey Olivier, O.D.Idyllwild, CA 925491366639726
  3. Miguel Olmedo, ODLa Palma, CA 906231205558988
  4. Stevie Olney, O.D.Beaumont, CA 922231639541378
  5. Nathaniel Olson, ODRiverside, CA 925061417930330
  6. Samaneh Omidghaemi, O.D.Los Angeles, CA 900371790072585
  7. Sepideh Omidghaemi, ODLos Angeles, CA 900411457887085
  8. Stacy Omon, ODHanford, CA 932301821013707
  9. Sarah Onaga, ODTustin, CA 927801710417522
  10. Catherine Ong, ODCupertino, CA 950141346960689
  11. Cathy Ong, O.D.Tustin, CA 927821801123518
  12. Ellen OngBurlingame, CA 940101639737166
  13. Frances Ong, ODAntioch, CA 945091942344197
  14. Glenda Ong, O.D.Beaumont, CA 922231336303700
  15. Jennifer Ong, O.D.Alameda, CA 945011700878055
  16. Jenny Ong, O.D.Irvine, CA 926021518000231
  17. Kathy Ong, O.D.San Rafael, CA 949011609038629
  18. Shirley Ong, O.D.Antioch, CA 945091861540205
  19. Steven Ong, O.D., M.S.Rancho Cordova, CA 956701922150796
  20. Tiffany Ong, ODManhattan Beach, CA 902661902889009
  21. Winson Ong, O.D.Brentwood, CA 945131821132143
  22. Ryan Onishi, O.D.San Juan Capistrano, CA 926751053487116
  23. Michael Ontingco, O.D.San Diego, CA 921141770651945
  24. Khin Oo, O.DYorba Linda, CA 928871760687396
  25. Matthew Oppegaard, ODSan Rafael, CA 949011386625283
  26. Caren Oquindo, ODFullerton, CA 928311730494055
  27. Lok Or, ODClaremont, CA 917111831680719
  28. John Ora, ODVentura, CA 930031124540489
  29. Natalie Ora, O.D.Ventura, CA 930031891216180
  30. Ana OrdonezMontebello, CA 906401437045994
  31. Kathryn Ordonez, ODSan Diego, CA 921031821560418
  32. Xavier Ordonez, O.D.Whittier, CA 906011750488193
  33. James OroszSanta Rosa, CA 954031699831800
  34. Ana Orozco, O.D.Pleasant Hill, CA 945231790672400
  35. Isela Orozco, ODBerkeley, CA 947201720977127
  36. Lavender Orr, ODBurbank, CA 915051578813598
  37. Nathan Orr, O.D.Lafayette, CA 945491558561183
  38. Amy Orseth, O.D.Santa Cruz, CA 950621043651243
  39. Catherine Ortiz, ODVictorville, CA 923921215861000
  40. Robert Ortiz, ODSan Diego, CA 921201598969636
  41. Erin Osako, O.D.Alhambra, CA 918011043261712
  42. Eugene Osako, O.D.Culver City, CA 902321376683409
  43. Douglas Osborne, ODCarlsbad, CA 920081467430587
  44. Jennifer OsborneRiverside, CA 925051023706728
  45. Gary Osias, O.D.Castro Valley, CA 945461639230923
  46. Laila Osmani-NejatNewark, CA 945601205210804
  47. Michael Osterhoudt, O.D.Beale Afb, CA 959031821017351
  48. Darren Osterloh, ODWestlake Village, CA 913621124076849
  49. Bijan Ostowari, ODRancho Cucamonga, CA 917301679294607
  50. Gordon Ota, O.D.Fountain Valley, CA 927081154392470

Source: CMS NPPES, primary taxonomy 152W00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 17 of 51 per resident

  1. Montana22
  2. Illinois21
  3. Massachusetts21
  4. California21
  5. Iowa21
  6. Washington21
  7. 50 states and D.C.19

Source: CMS NPPES, primary taxonomy 152W00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

66.8% of these records appear in a Medicare file, against 71.9% 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. California66.8%
  2. United States71.9%

Optometrist records in California, measured

  • In a Medicare file5,553 of 8,308 · 66.8% here, 71.9% nationally
  • In the CMS Doctors and Clinicians file3,575 · 43.0% here, 57.6% nationally
  • Not updated in five years or more5,560 · 66.9% here, 65.3% nationally
  • Median graduation year2008 · the 3,573 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 152W00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

8,308 NPPES records list optometrist (152W00000X) as their primary taxonomy with a practice address in California: 21 per 100,000 residents against 19 nationally (50 states and D.C.). Los Angeles has 371 of them (4%).

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. Texas5,006
  2. Florida3,594
  3. New York3,535
  4. Illinois2,697

States with a similar rate per 100,000

  1. Massachusetts21.4
  2. Iowa21.1
  3. Montana21.6
  4. Washington21.0

The largest states

  1. Texas5,006
  2. Florida3,594
  3. New York3,535
  4. Illinois2,697
  5. Pennsylvania2,640

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.