NPPES file of Aug 9, 2026

Doctors and health care providers in Oakland, CA

18,558 individual NPPES records list a practice address in Oakland, 7th of 812 California cities. The largest group is marriage & family therapist: 1,576, 8% of the city's records, against 6% across California. Page 250 of 372.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

The 8 largest groups in Oakland

Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.

Oakland in California

  • Rank in California7th of 812 cities by records
  • Share of the state1.9% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups22.2% of all records
  • Marriage & Family Therapist rank5th of the 10 California cities with the most

Compared with California as a whole, Oakland has 2.9× the state's share of counselor records and 0.29× its share of behavior technician records.

Providers in Oakland, alphabetically

  1. America OrozcoClinical Social Worker1558098384
  2. Tiffany Orozco, LCSWClinical Social Worker1063714616
  3. Nisarindani Orozco McCormickStudent in an Organized Health Care Education/Training Program1477145134
  4. Mayra Orozco-Llamas, MDFamily Medicine Physician1245970888
  5. Harold Orr, MDInternal Medicine Physician1861822819
  6. Rosio OrrDay Training/Habilitation Specialist1356193064
  7. Shaun Orrante-BennettMarriage & Family Therapist1255736310
  8. Karen Orsulak, LCSWClinical Social Worker1780734111
  9. Rosario OrtaMarriage & Family Therapist1992200505
  10. Andy OrtegaBehavior Technician1366302549
  11. Brenda OrtegaCounselor1790268886
  12. Jason OrtegaMental Health Counselor1063666022
  13. Sianna OrtegaBehavior Technician1942142351
  14. Aylin Ortega RomeroDay Training/Habilitation Specialist1538872692
  15. Alejandrina OrtizSocial Worker1790195519
  16. Amy OrtizBehavior Technician1780296806
  17. Blanca OrtizCase Manager/Care Coordinator1700686136
  18. Erasmo OrtizDay Training/Habilitation Specialist1538086277
  19. Haydee OrtizPsychiatric/Mental Health Nurse Practitioner1558678862
  20. Illiana OrtizBehavior Technician1417739863
  21. Jason OrtizDay Training/Habilitation Specialist1255257838
  22. Jennifer Ortiz, LVNLicensed Vocational Nurse1770047730
  23. Linda Ortiz, PTPhysical Therapist1518096205
  24. Lisa Ortiz, D.C.Chiropractor1740661339
  25. Marie OrtizMental Health Counselor1104118983
  26. Natalie OrtizSpecialist1306398284
  27. Nayeli OrtizDay Training/Habilitation Specialist1780407692
  28. Ralph Ortiz, D.C.Chiropractor1487773776
  29. Xochitl OrtizMental Health Counselor1912335357
  30. Yanci Ortiz RomeroAddiction (Substance Use Disorder) Counselor1275321259
  31. Christian OrtonBehavior Technician1174389837
  32. Nicole Orton, LACAcupuncturist1306589056
  33. Jeremy Orvik, MDEmergency Medicine Physician1972628477
  34. Darcy OryallStudent in an Organized Health Care Education/Training Program1639796840
  35. Rachel OsaikhuiwuLicensed Vocational Nurse1760779425
  36. Grace Osborn, PAPhysician Assistant1194496265
  37. Alicea Osborne, AMFTMarriage & Family Therapist1033060413
  38. Dean OsborneBehavior Technician1437829249
  39. Zavier OsborneMental Health Counselor1609060607
  40. Pamela OsegueraClinical Social Worker1578306510
  41. Talita OsegueraAdvanced Practice Midwife1629461090
  42. Keiran OsheaBehavior Technician1811755838
  43. Gbolahan Oshikoya, LVNLicensed Vocational Nurse1114686029
  44. Britnie Oshima, PHARMDPharmacist1861774747
  45. Oluwadamilola Oshinuga, MDPediatrics Physician1225695463
  46. Charles OsivwemuMental Health Counselor1194959288
  47. Cecile Osman, M.D.Pediatrics Physician1558597989
  48. Pamela Osnes, PH.D., BCBA-DBehavior Analyst1902169709
  49. Alyssia OsorioDoula1003740374
  50. Camilo Osorio, MDStudent in an Organized Health Care Education/Training Program1457109803

The largest California cities

  1. Los Angeles69,537
  2. San Diego52,937
  3. San Francisco38,143
  4. Sacramento33,083
  5. San Jose20,925

All of California →

How to read this directory

Oakland, California appears in the CMS National Plan and Provider Enumeration System with 18,558 registered healthcare providers spanning 25 or more distinct NUCC-taxonomy specialties. This count includes every individual clinician who has applied for an NPI and listed a practice address in Oakland - physicians, dentists, nurse practitioners, physician assistants, chiropractors, physical therapists, optometrists, psychologists, podiatrists, and every other credentialed provider type CMS tracks. It does not measure hospital beds, urgent-care capacity, or whether a given clinic is accepting new patients; it measures the pool of professionals with current NPI enrollment and a Oakland practice location on file. Every figure is drawn from the federal National Provider Identifier Registry (CMS NPPES) - more than 7 million providers, maintained since May 2007, with 2024 Medicare Part D data, and, according to CMS, can be searched, compared, and traced in our methodology.

The provider mix in Oakland is weighted toward Marriage & Family Therapist (1,576 clinicians, followed by Student in an Organized Health Care Education/Training Program with 1,419 and Clinical Social Worker with 1,130). That distribution reflects how NPPES records specialty: providers self-select a primary taxonomy code, so a family physician who also practices geriatrics will show up under whichever NUCC code they registered first. Relative to California's population, Oakland reports roughly 47.6 providers per 100,000 residents using the state-level denominator, which is a rough proxy rather than a precise access-to-care measurement; the true catchment area of any {cityName} clinician extends beyond the municipal boundary.

Of California's most common specialties, General Practice Dentistry is the most prominent one with no provider currently listing a Oakland practice address, a coverage gap Oakland patients typically fill by traveling to a larger nearby hub.

For Oakland patients, this directory is most useful as a starting shortlist. Important: PlainDoctor is a directory of publicly available CMS government data, not a review site, a ranking, or medical advice. NPPES data is self-reported and refreshed monthly; call the practice directly to confirm the provider is still there, accepts your insurance, and is taking new patients.

For informational purposes only; this directory is not medical advice and not a substitute for checking a license. See also: how to find a doctor and how to verify one.

Common questions

How many doctors are in Oakland, CA?

There are 18,558 registered healthcare providers in Oakland, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Oakland?

The most common specialties in Oakland are Marriage & Family Therapist, Student in an Organized Health Care Education/Training Program, Clinical Social Worker, Mental Health Counselor, Behavior Technician. Marriage & Family Therapist has the most providers with 1,576.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov). Records are self-reported registrations, not licenses.

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.