NPPES file of Aug 9, 2026

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.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

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

  1. Curtis Choi, DPTPhysical Therapist1861845109
  2. Esther Choi, PHARM. D.Pharmacist1831476431
  3. Jack Choi, M.D.Emergency Medicine Physician1710186713
  4. James Choi, MDSurgery Physician1215016977
  5. Jina Choi, FNPFamily Nurse Practitioner1497644207
  6. Michael Choi, MDUrology Physician1215015797
  7. Renee Choi, N.D.Naturopath1679981161
  8. Samuel Choi, M.D.Diagnostic Radiology Physician1932135746
  9. Yun Sok Choi, MDAnesthesiology Physician1669527164
  10. Brian Chon, MDOphthalmology Physician1679990626
  11. Francisco Chong, PHARMDPharmacist1427097278
  12. Mee-Jin Chong, M.D.Family Medicine Physician1407994072
  13. Pil Choo, M.D.Anatomic Pathology Physician1346563087
  14. Jodi Choplin, NPFamily Nurse Practitioner1790552305
  15. Parminder Chopra, MDAnesthesiology Physician1619055787
  16. Dennis ChouFamily Medicine Physician1295430155
  17. Grace Chou, M.D.Family Medicine Physician1053309369
  18. Tina Chou, M.D.Pediatric Ophthalmology and Strabismus Specialist Physician1336250117
  19. Aditi Choudhry, M.D.Hematology & Oncology Physician1427218908
  20. Natasha Choudri, PSYDAddiction (Substance Use Disorder) Psychologist1841691805
  21. David Chow, M.D.Pain Medicine (Physical Medicine & Rehabilitation) Physician1700823762
  22. Lauren ChowBehavior Analyst1083193130
  23. Mei Chow-Kwan, MDInternal Medicine Physician1689619330
  24. Ly Ly ChoyPharmacist1003340498
  25. Angela Christian, N.P.Nurse Practitioner1023442167
  26. Darrell Christian, PH.D.Psychologist1023031564
  27. Keiara ChristianBehavior Technician1568337376
  28. Mark Christiansen, MDEndocrinology, Diabetes & Metabolism Physician1821108218
  29. Lucas Christianson, M.D.Cardiovascular Disease Physician1700158201
  30. Maryann ChristofasPediatric Nutrition Registered Dietitian1184172736
  31. Maggie ChristolosBehavior Technician1760036149
  32. Sophie ChrittonBehavior Technician1942191739
  33. Royce Chrys, MDDiagnostic Radiology Physician1609802131
  34. Tiffany ChryssikosBehavior Analyst1871220947
  35. Andrew Chu, M.D.Critical Care Medicine (Internal Medicine) Physician1861816639
  36. Deborah Chu, PHARMDPharmacist1760844211
  37. George Chu, MDDiagnostic Radiology Physician1952340465
  38. Evan ChuaEmergency Medicine Physician1437719358
  39. Stella ChuaBehavior Technician1700356383
  40. Cristina Chua-Lim, MDPediatrics Physician1487765756
  41. Susan Chuang, MDInternal Medicine Physician1578641643
  42. Ka Ying Chui, NPFamily Nurse Practitioner1659007060
  43. Abraham Chung, M.D.Hospitalist Physician1104845858
  44. Chul Chung, M.D.Diagnostic Radiology Physician1033552773
  45. Daniel Chung, MDGastroenterology Physician1063590552
  46. Eri Chung, RDRenal Nutrition Registered Dietitian1497376982
  47. Hye Yoon Chung, PHARMDPharmacist1528337474
  48. Yau Han Eva Chung, ODOptometrist1275373417
  49. Hannah ChylinskiBehavior Technician1518784727
  50. Jordan CiesielskiBehavior Technician1770278673

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

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.