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 246 of 372.
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
- Katharine O'Donnell, MSWCounselor1104268127
- Myles O'Donnell, DCChiropractor1811623499
- James O'DriscollMental Health Counselor1194069476
- Janellen O'HaraCommunity Health Worker1003059817
- Patrick O'Hearn, PH.D.Clinical Psychologist1245307529
- Brian O'Kelly, MDCardiovascular Disease Physician1023196722
- Mary O'Leary, CRNACertified Registered Nurse Anesthetist1235698929
- Colin O'MalleyDay Training/Habilitation Specialist1669282869
- Kerynne O'MalleyMarriage & Family Therapist1316790116
- Heather O'Moore, DCChiropractor1770321945
- Bruce O'Neil, M.D.Internal Medicine Physician1255399580
- Deidre O'Neill, MSWSocial Worker1295113181
- Gavin O'NeillAddiction (Substance Use Disorder) Counselor1376033159
- Savannah O'NeillAddiction (Substance Use Disorder) Counselor1003176637
- Shawna O'Neill, MAMental Health Counselor1235392465
- Keegan O'RavezRegistered Nurse1487349486
- Emily O'Rourke, M.D.Anatomic Pathology & Clinical Pathology Physician1437492386
- Felice O'Ryan, DDSOral and Maxillofacial Surgery (Dentist)1255419834
- Caroline O'Sullivan, MFTIMental Health Counselor1679823579
- Clare O'TooleMarriage & Family Therapist1508006511
- Julian OakleyCommunity Health Worker1053199679
- Rosesharon OatesMassage Therapist1861882623
- Demetrie OaxtonMental Health Counselor1316211485
- Edward Obbard, PSY.D.Clinical Psychologist1912185315
- Sara Obeid, MD, MPHInternal Medicine Physician1619400678
- Ainsley ObenausDay Training/Habilitation Specialist1700696994
- Charles ObengDriver1699435107
- Hargun OberaiFoot & Ankle Surgery Podiatrist1841824265
- Adrienne Oberstein, M.S.Mental Health Counselor1295873610
- Ogochukwu ObiStudent in an Organized Health Care Education/Training Program1972076131
- Bianca Obiakor, MDStudent in an Organized Health Care Education/Training Program1902607161
- Cajethan Obidah, LMFTMarriage & Family Therapist1851050561
- Susana ObispoAddiction (Substance Use Disorder) Counselor1619426475
- Elizabeth Obolensky, M.S.Genetic Counselor (M.S.)1316008584
- Diana Obrinsky, M.D.Pediatrics Physician1780705871
- Theodor ObukhovBehavior Technician1023898871
- Jennifer ObyrneMental Health Counselor1962845495
- Danica Ariel OcampoBehavior Technician1811552342
- Salvador Oceguera, DCChiropractor1316876279
- Cristal OchoaBehavior Technician1952244980
- Edna OchoaRegistered Nurse1578173423
- Karie Ochoa, MSWClinical Social Worker1952778508
- Richard Ochoa, PAEmergency Clinical Nurse Specialist1316928088
- Ruth Ochoa, M.D.Hospice and Palliative Medicine (Emergency Medicine) Physician1508028481
- Timothy OchoaStudent in an Organized Health Care Education/Training Program1770385692
- Veronica OchoaClinical Social Worker1831300565
- Joy Octaviano, MS, RN, AOCNSOncology Registered Nurse1578921565
- Maddy Oden, DOULA CERTIFICATIONCommunity Health Worker1871163758
- Noah Oderberg, PH.D.Marriage & Family Therapist1508997206
- Mireia OdlinStudent in an Organized Health Care Education/Training Program1306494570
The largest California cities
- Los Angeles69,537
- San Diego52,937
- San Francisco38,143
- Sacramento33,083
- San Jose20,925
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.