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 288 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. Anabel Ruiz, MDFamily Medicine Physician1477729259
  2. Andrea Ruiz, RNRegistered Nurse1437005972
  3. Deanna RuizBehavior Technician1003530528
  4. Gabriela Ruiz, LCSWClinical Social Worker1578285631
  5. Jasmine RuizDay Training/Habilitation Specialist1821720327
  6. Jessica RuizClinical Social Worker1073023297
  7. Luis RuizAdult Companion1336976166
  8. Marisol RuizBehavior Technician1235973694
  9. Sarah RuizBehavior Technician1194524934
  10. Concepcion Ruiz BrisenoCommunity Health Worker1104542968
  11. Ana Ruiz HernandezSocial Worker1336877083
  12. Norma Ruiz IniguezFamily Nurse Practitioner1316405574
  13. Danellia RumenserDay Training/Habilitation Specialist1740116797
  14. Gregory Rumore, MDAnatomic Pathology Physician1649344243
  15. Megan Rundel, PHDPsychologist1417384553
  16. Horia Rus, MDAnesthesiology Physician1912168147
  17. Brittany Rush, MDPsychiatry Physician1366947616
  18. Jaslyn RushBehavior Technician1861981870
  19. Karen Rush, PAPhysician Assistant1629139985
  20. Rebecca Rush, RNCommunity Health Registered Nurse1023666054
  21. Annabelle Rushing NelsonCase Manager/Care Coordinator1316791197
  22. Erin Rushworth, DPTPhysical Therapist1730037276
  23. Evan Rusoja, MD, PHDEmergency Medicine Physician1013370865
  24. Alicia RussellBehavior Analyst1104632660
  25. Jaqueese RussellCommunity Health Worker1104665124
  26. Jonathan Russell, MACounselor1083265805
  27. Julie RussellBehavior Technician1821860909
  28. Leezae RussellDay Training/Habilitation Specialist1871396168
  29. Natalie RussellPhysical Therapist1457832578
  30. Rose Russell, DCChiropractor1972292589
  31. Talaisa RussellAdult Companion1215748579
  32. Hassan Malik Russell Williams, APCCMental Health Counselor1477301711
  33. Jennifer Russo, MS, LEPSchool Psychologist1508697434
  34. Jacquelyn Russum, RDNRegistered Dietitian1710864657
  35. David Rustamzadeh, DDS, MSDPeriodontics1851469712
  36. Emerson Rustand, MDStudent in an Organized Health Care Education/Training Program1548063613
  37. Joanna Ruthenberg, M.D.Pediatrics Physician1669481214
  38. Chelsea RutherfordAcupuncturist1306320106
  39. Jasmine RutherfordCommunity Health Worker1013489954
  40. Mary Rutherford, MDPediatric Emergency Medicine (Pediatrics) Physician1407932676
  41. Yvonne Rutherford, MDPediatric Critical Care Medicine Physician1386722189
  42. Laura RutledgeMarriage & Family Therapist1467734814
  43. David Rutschman-Byler, LPCCProfessional Counselor1477007086
  44. Vanessa RuvalcabaMarriage & Family Therapist1821545807
  45. Yesenia RuvalcabaBehavior Analyst1114420775
  46. Casey RyanCommunity Health Worker1144914342
  47. Dawn Ryan, LMFTMarriage & Family Therapist1104975911
  48. Jeri RyanDay Training/Habilitation Specialist1407582836
  49. Karina Ryan, APCCMental Health Counselor1780445312
  50. Lisa Ryan, RAS, CATCAddiction (Substance Use Disorder) Counselor1588185441

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.