2026 data CMS NPPES NUCC Taxonomy

Doctors in Oakland, CA

Active healthcare providers in Oakland sourced from the CMS NPPES weekly file, no proprietary ratings, no editorial scores. NPI counts, specialty distribution, and primary practice addresses refreshed each release.

18,012
Providers
CMS NPPES-registered
20
Specialties
NUCC taxonomy codes
Student in an Organized Health Care Education/Training Program
Top specialty
1,521 providers
California
State
CA

18,012 healthcare providers across 20 specialties

Oakland, California appears in the CMS National Plan and Provider Enumeration System with 18,012 registered healthcare providers spanning 20 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 2023 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 Student in an Organized Health Care Education/Training Program (1,521 clinicians, followed by Marriage & Family Therapist with 1,290 and Mental Health Counselor with 1,250). 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 46.2 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.

Within California, Oakland ranks #7 of 805 cities tracked by provider count, accounting for 1.9% of the state's registered providers. 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, searching by specialty narrows the 690-taxonomy roster to clinicians with the relevant training, and each provider page links to NPI, state licensing boards, and the NPPES registry for credential verification. 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, so listing details may be out of date; call the practice directly to confirm the provider is still there, accepts your insurance, and is taking new patients. Nothing on this page substitutes for consulting a licensed clinician about your personal health decisions.

18,012
Providers
20
Specialties
#7
of 805 CA cities
1.9%
of CA providers
46.2
Per 100K (state)

Which specialties are most common in Oakland

Student in an Organized Health Care Education/Training Program 1,521
Marriage & Family Therapist 1,290
Mental Health Counselor 1,250
Counselor 996
Behavior Technician 976
Clinical Social Worker 949
Community Health Worker 571
Case Manager/Care Coordinator 512
Registered Nurse 492
Internal Medicine Physician 442
Social Worker 422
Pharmacist 410
Behavior Analyst 385
Addiction (Substance Use Disorder) Counselor 370
Pediatrics Physician 331
Physical Therapist 325
Clinical Psychologist 310
Psychologist 246
Acupuncturist 232
Specialist 210

Healthcare Providers (Page 297)

Name
Claudia Sieber, MFT
Marriage & Family Therapist
Lea Siegel
Clinical Social Worker
Sheila Siemer, RN
Registered Nurse
Sabrina Sierra
Mental Health Counselor
Winter Sierra
Student in an Organized Health Care Education/Training Program
Stephanie Sieveke
Marriage & Family Therapist
Arianna Sifuentes, LMFT
Marriage & Family Therapist
Martha Sifuentes-Guzman
Case Manager/Care Coordinator
Kathryn Sigford, MD
Physical Medicine & Rehabilitation Physician
Alison Siggelkow
Marriage & Family Therapist
Exia Sikes, RN
Registered Nurse
Julia Sikora
Mental Health Counselor
Anne Silber, LCSW,JD
Clinical Social Worker
Edith Silber, NP
Family Nurse Practitioner
Sheetal Siledar-Lee
Mental Health Counselor
Kyle Siler, RPH
Pharmacist
Rona Silkiss, M.D.
Ophthalmic Plastic and Reconstructive Surgery Physician
Gil Sillins
Mental Health Counselor
Eli Sills, MD
Pediatrics Physician
Starla Sills, M.D.
Anesthesiology Physician
Alexa Silva
Clinical Social Worker
Alysiah Silva
Counselor
Clementina Silva
Counselor
Katie Silva
Community Health Worker
Mary Silva
Other Technician
Natalie Silva
Mental Health Counselor
Scarlet Silva
Addiction (Substance Use Disorder) Counselor
Tenley Silva, M.S., MFTI
Marriage & Family Therapist
Joyce Silva Galan, RDH
Dental Hygienist
Veronica Silva-Bernal
Behavior Technician
Barbra Silver, MFC
Marriage & Family Therapist
Lauren Silver
Clinical Social Worker
Lynn Silver, MD, MPH,
Pediatrics Physician
Rachel Silver
Clinical Social Worker
Sarit Silver, MD
Pediatrics Physician
Stephen Silver, DPM
Podiatrist
Sean Silverio, DDS
Pediatric Dentistry
Rebecca Silverstein, MFT
Marriage & Family Therapist
Russell Silverstein, MD
Internal Medicine Physician
Victor Silvestre, MD
Internal Medicine Physician
Ghia Simbulan, CCC-SLP
Speech-Language Pathologist
Gabriel Simkover
Behavior Analyst
Aaron Simmons
School Psychologist
Charline Simmons, M.D.
Psychiatry Physician
Crystal Simmons
School Psychologist
Jamari Simmons
Community Health Worker
Joya Simmons
Adult Companion
Cameron Simms, MS, CCC-SLP
Speech-Language Pathologist
Earl Simms
Counselor
Elizabeth Simms, N.P.
Women's Health Nurse Practitioner

Nearby Cities in California

Other California cities with provider coverage in the CMS NPPES registry.

Compare specialties side-by-side →

Frequently Asked Questions

How many doctors are in Oakland, CA?
There are 18,012 registered healthcare providers in Oakland, CA, covering 20 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 Student in an Organized Health Care Education/Training Program, Marriage & Family Therapist, Mental Health Counselor, Counselor, Behavior Technician. Student in an Organized Health Care Education/Training Program has the most providers with 1,521.

Provider data from CMS NPPES (download.cms.gov/nppes); specialty classification from NUCC Health Care Provider Taxonomy. PlainDoctor does not rate or rank providers. Methodology · About

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from CMS National Plan and Provider Enumeration System (NPPES). Consult a qualified professional before making decisions based on this data.

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-05-20.