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 249 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. Paula Ong, PA-CPhysician Assistant1730699034
  2. Tracy Ong, PH.D., BCBA-DIntellectual & Developmental Disabilities Psychologist1629200712
  3. Victoria OngRegistered Nurse1467869560
  4. Ann Ongerth, PTPhysical Therapist1821314279
  5. Franklin OnobrumenStudent in an Organized Health Care Education/Training Program1881345072
  6. Katie OnoeBehavior Technician1427769728
  7. Glenn Ontiveros, LMFTMarriage & Family Therapist1821478710
  8. Dan OnuRehabilitation Practitioner1962271445
  9. Chinyere OnuohaMarriage & Family Therapist1750843645
  10. Ifeanyichukwu OnwuatogwuNurse's Aide1386561611
  11. Kaobimdi OnyemaBehavior Technician1164382263
  12. Nwe OoCommunity Health Worker1538475587
  13. Lauren Oommen, D.ONeurology Physician1639319718
  14. Laura OpalDoula1215878871
  15. Beatrice OpereMental Health Counselor1689004293
  16. Arianna OpsvigMental Health Counselor1306033477
  17. Paul Opsvig, MDChild & Adolescent Psychiatry Physician1841212669
  18. Melody OrSchool Counselor1932036415
  19. Nicholas Or, OTR/LPhysical Rehabilitation Occupational Therapist1396492336
  20. Laura OrantesRehabilitation Practitioner1740088483
  21. Lindsay Orbeta, MS, RD, CSSDRegistered Dietitian1922460294
  22. Marco Louie Orden, DOStudent in an Organized Health Care Education/Training Program1265379945
  23. Jonathan OrdonezBehavior Technician1831829548
  24. Juan Ordonez, MDNephrology Physician1720166507
  25. Ruth OrdonezPediatric Registered Nurse1285196444
  26. Sonia Ordonez, MDObstetrics & Gynecology Physician1215049986
  27. Maria Orea RoblesSocial Worker1194609339
  28. Anuoluwapo OrebiyiMental Health Counselor1306453410
  29. Amy Orecchio, PSYDStudent in an Organized Health Care Education/Training Program1669680252
  30. Drew OrechwaMarriage & Family Therapist1740513837
  31. Clarice Oreilly- Cummins, R.P.T.Physical Therapist1174689277
  32. Annette OrejuelaCase Manager/Care Coordinator1790279818
  33. Dina OrellanaSpecialist1578175469
  34. David Orellana DelgadoCommunity Health Worker1841922622
  35. Kathryn Orfirer, PHDClinical Child & Adolescent Psychologist1306044755
  36. Kristi OrgillMarriage & Family Therapist1407167380
  37. Marissa OrgoglioCommunity Health Worker1811663941
  38. Marina Oribello, LMFTMarriage & Family Therapist1801341615
  39. Yasmin OriqatMarriage & Family Therapist1730811738
  40. Joshua Orlans, MSW, MPHSocial Worker1538102090
  41. Sheldon Orloff, MDPediatric Nephrology Physician1841378619
  42. Julie Orman, D.C.Chiropractor1770679524
  43. Wendy Ormiston, LCSWClinical Social Worker1922365428
  44. Ana OrnelasDay Training/Habilitation Specialist1821973249
  45. Nayeli OrnelasCounselor1639883762
  46. Veronica OrnelasSchool Counselor1417835240
  47. Gisele Ornelas CovarrubiasStudent in an Organized Health Care Education/Training Program1417886144
  48. Margarita Orona, M.ACounselor1073057972
  49. Annette Oropeza, LCSWCounselor1730754193
  50. Sarah Orosz, LCSWClinical Social Worker1417397225

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.