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 287 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. Jon Rowland, M.D., PHDPediatric Pathology Physician1861417412
  2. Shawn Rowland, LCSWClinical Social Worker1326228842
  3. Paul RowleyStudent in an Organized Health Care Education/Training Program1922740315
  4. Qiao Hong RowleyRegistered Nurse1891341004
  5. Stephen Rowse, MDStudent in an Organized Health Care Education/Training Program1477131969
  6. Kali RowsonClinical Social Worker1285933267
  7. Ma. Alyssah Faith RoxasRehabilitation Practitioner1578284501
  8. Brenna RoyRehabilitation Practitioner1174477012
  9. Hlanganiso Roy, MSWMental Health Counselor1689908964
  10. Marcia RoyMental Health Counselor1255624177
  11. Michelle Roy, RDRegistered Dietitian1144507252
  12. Ranjeeta RoyMarriage & Family Therapist1477945087
  13. Aiswarya Roy Karintholil, MDStudent in an Organized Health Care Education/Training Program1437090834
  14. Deborah Royal, N.P.Nurse Practitioner1801815410
  15. Patricia RoyballCommunity Health Worker1841612645
  16. Marcia Roye-Madison, FNP-CFamily Nurse Practitioner1447542303
  17. Andrea RubensteinClinical Psychologist1225416704
  18. Rebecca RubeyBehavior Technician1801386222
  19. Eric RubinStudent in an Organized Health Care Education/Training Program1477390920
  20. Jacob RubinRecreation Therapist1972461473
  21. Theresa Rubin-Ortiz, LCSWClinical Social Worker1093834327
  22. Casilda Rubio, M.D.Pediatric Emergency Medicine (Pediatrics) Physician1053490490
  23. Edith RubioPeer Specialist1679214175
  24. Glenda RubioBehavior Technician1235694928
  25. Joseline RubioBehavior Technician1548133184
  26. Karen Rubio, MS, RD, CDERegistered Dietitian1306903661
  27. Laura Rubio, BIRTH DOULADoula1619687480
  28. Lyzel RubioLicensed Vocational Nurse1558190454
  29. Shaun RubioDay Training/Habilitation Specialist1487483848
  30. Joanne RubyMental Health Counselor1922549666
  31. William Ruch, D.C.Chiropractor1922028661
  32. Ashleigh Rucker, CMTMassage Therapist1710846837
  33. Shannon Rucker, MFTMarriage & Family Therapist1730386442
  34. Eleanor Ruckman, MFT, ATRMarriage & Family Therapist1124166848
  35. Donald Ruddell, DDSDentist1417986415
  36. Michael Ruderman, DO, MPHResearch Study Specialist1902259880
  37. Johanna Rudnick, BACounselor1700218278
  38. Nina RudnickClinical Child & Adolescent Psychologist1952469173
  39. River Rudolph, ASWSocial Worker1144952128
  40. Hannah RudstenMarriage & Family Therapist1477061141
  41. Jeffrey Rueda, MDDiagnostic Radiology Physician1336227123
  42. Brenda RuelasBehavior Technician1669939344
  43. Isaac RuelasMental Health Counselor1851795793
  44. Zobeyda Ruelas-McMulenRehabilitation Practitioner1821633421
  45. Mariyam-Ifteam Rufael, LMFTMarriage & Family Therapist1053965889
  46. Ruby Rugama GardeaMarriage & Family Therapist1376039701
  47. Melinda RugerRehabilitation Practitioner1568254514
  48. Timothy RugnaoBehavior Analyst1356848527
  49. Aimee Ruiz, L.AC.Acupuncturist1295081271
  50. Alex RuizRehabilitation Practitioner1730033234

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.