Doctors and health care providers in Walnut Creek, CA
6,170 individual NPPES records list a practice address in Walnut Creek, 23rd of 812 California cities. The largest group is behavior technician: 1,764, 29% of the city's records, against 18% across California. Page 21 of 124.
The 8 largest groups in Walnut Creek
Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.
Walnut Creek in California
- Rank in California23rd of 812 cities by records
- Share of the state0.6% of California's records
- Specialties present25 or more taxonomy codes
- Top three groups37.6% of all records
Compared with California as a whole, Walnut Creek has 3.5× the state's share of hospitalist physician records and 0.39× its share of mental health counselor records.
Providers in Walnut Creek, alphabetically
- Curtis Choi, DPTPhysical Therapist1861845109
- Esther Choi, PHARM. D.Pharmacist1831476431
- Jack Choi, M.D.Emergency Medicine Physician1710186713
- James Choi, MDSurgery Physician1215016977
- Jina Choi, FNPFamily Nurse Practitioner1497644207
- Michael Choi, MDUrology Physician1215015797
- Renee Choi, N.D.Naturopath1679981161
- Samuel Choi, M.D.Diagnostic Radiology Physician1932135746
- Yun Sok Choi, MDAnesthesiology Physician1669527164
- Brian Chon, MDOphthalmology Physician1679990626
- Francisco Chong, PHARMDPharmacist1427097278
- Mee-Jin Chong, M.D.Family Medicine Physician1407994072
- Pil Choo, M.D.Anatomic Pathology Physician1346563087
- Jodi Choplin, NPFamily Nurse Practitioner1790552305
- Parminder Chopra, MDAnesthesiology Physician1619055787
- Dennis ChouFamily Medicine Physician1295430155
- Grace Chou, M.D.Family Medicine Physician1053309369
- Tina Chou, M.D.Pediatric Ophthalmology and Strabismus Specialist Physician1336250117
- Aditi Choudhry, M.D.Hematology & Oncology Physician1427218908
- Natasha Choudri, PSYDAddiction (Substance Use Disorder) Psychologist1841691805
- David Chow, M.D.Pain Medicine (Physical Medicine & Rehabilitation) Physician1700823762
- Lauren ChowBehavior Analyst1083193130
- Mei Chow-Kwan, MDInternal Medicine Physician1689619330
- Ly Ly ChoyPharmacist1003340498
- Angela Christian, N.P.Nurse Practitioner1023442167
- Darrell Christian, PH.D.Psychologist1023031564
- Keiara ChristianBehavior Technician1568337376
- Mark Christiansen, MDEndocrinology, Diabetes & Metabolism Physician1821108218
- Lucas Christianson, M.D.Cardiovascular Disease Physician1700158201
- Maryann ChristofasPediatric Nutrition Registered Dietitian1184172736
- Maggie ChristolosBehavior Technician1760036149
- Sophie ChrittonBehavior Technician1942191739
- Royce Chrys, MDDiagnostic Radiology Physician1609802131
- Tiffany ChryssikosBehavior Analyst1871220947
- Andrew Chu, M.D.Critical Care Medicine (Internal Medicine) Physician1861816639
- Deborah Chu, PHARMDPharmacist1760844211
- George Chu, MDDiagnostic Radiology Physician1952340465
- Evan ChuaEmergency Medicine Physician1437719358
- Stella ChuaBehavior Technician1700356383
- Cristina Chua-Lim, MDPediatrics Physician1487765756
- Susan Chuang, MDInternal Medicine Physician1578641643
- Ka Ying Chui, NPFamily Nurse Practitioner1659007060
- Abraham Chung, M.D.Hospitalist Physician1104845858
- Chul Chung, M.D.Diagnostic Radiology Physician1033552773
- Daniel Chung, MDGastroenterology Physician1063590552
- Eri Chung, RDRenal Nutrition Registered Dietitian1497376982
- Hye Yoon Chung, PHARMDPharmacist1528337474
- Yau Han Eva Chung, ODOptometrist1275373417
- Hannah ChylinskiBehavior Technician1518784727
- Jordan CiesielskiBehavior Technician1770278673
The largest California cities
- Los Angeles69,537
- San Diego52,937
- San Francisco38,143
- Sacramento33,083
- San Jose20,925
How to read this directory
Walnut Creek, California appears in the CMS National Plan and Provider Enumeration System with 6,170 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 Walnut Creek - 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 Walnut Creek 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 Walnut Creek is weighted toward Behavior Technician (1,764 clinicians, followed by Marriage & Family Therapist with 315 and Pharmacist with 239). 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, Walnut Creek reports roughly 15.8 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, Student in an Organized Health Care Education/Training Program is the most prominent one with no provider currently listing a Walnut Creek practice address, a coverage gap Walnut Creek patients typically fill by traveling to a larger nearby hub.
For Walnut Creek 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 Walnut Creek, CA?
There are 6,170 registered healthcare providers in Walnut Creek, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.
What are the most common medical specialties in Walnut Creek?
The most common specialties in Walnut Creek are Behavior Technician, Marriage & Family Therapist, Pharmacist, Behavior Analyst, Internal Medicine Physician. Behavior Technician has the most providers with 1,764.
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.