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 39 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. Zaira GasanovaPsychiatry Physician1447778816
  2. Gillian GashBehavior Technician1285236950
  3. John Gasperoni, PH.D.Clinical Psychologist1619940178
  4. Melissa Gastellum, N.D.Naturopath1689906711
  5. Dominique GastonBehavior Analyst1750628244
  6. Marlana GastonBehavior Technician1760328512
  7. Deborah GatesBehavior Technician1790476174
  8. Marisa GattiRegistered Nurse1518559434
  9. Maya GattupalliNeurology Physician1033798228
  10. Richard GaugerBehavior Technician1730779208
  11. Preeti GaurBehavior Technician1669936357
  12. Jean Gauvin, M.D.Psychiatry Physician1689801912
  13. Ivy Faith GaveroBehavior Technician1841965019
  14. Aruna Gavini, MDHematology & Oncology Physician1942439021
  15. Michael GaxiolaBehavior Technician1700605599
  16. Hayley Gaydos, MSSpeech-Language Pathologist1972263788
  17. James Gaydos, D.O.Neuromusculoskeletal Medicine & OMM Physician1790778439
  18. William Gazdar, D.C. C.C.S.P.,Q.M.E.Sports Physician Chiropractor1255472494
  19. Kevin GebkenMarriage & Family Therapist1487015269
  20. Melissa Geddis, LMFTMarriage & Family Therapist1831802396
  21. David Gee, MDCardiovascular Disease Physician1588742670
  22. Joey GeeBehavior Analyst1760950877
  23. Lance Gee, M.D.Family Medicine Physician1497731665
  24. Lloyd GeguientoPhysical Therapist1467102897
  25. Benjamin Geleris, DDSGeneral Practice Dentistry1568074839
  26. Jonathan Geleris, D.D.S.General Practice Dentistry1043686850
  27. Anna GellerFamily Nurse Practitioner1174914410
  28. Sofia Ysabel GeluzBehavior Technician1629823372
  29. Heather Gemmer, M.A., CCC-AAudiologist-Hearing Aid Fitter1932263480
  30. Karna Gendo, M.D.Allergy & Immunology Physician1720164536
  31. Ji Yeong Gendron SongFamily Nurse Practitioner1033788898
  32. Leah Lisa Geneza, PT, DPTPhysical Therapist1891237798
  33. David GeorgeGeneral Care Registered Respiratory Therapist1518422617
  34. Patricia Geraghty, N.P.Women's Health Nurse Practitioner1316067952
  35. Kseniya Gershberg, DCChiropractor1477028892
  36. Claudia Gerst, LMFTMarriage & Family Therapist1457385767
  37. Brandon Gessert, DCChiropractor1457163362
  38. Rachel Gessert, D.C.Chiropractor1508629627
  39. Aliya Gessling, M.D.Hospice and Palliative Medicine (Internal Medicine) Physician1912389149
  40. Victoria GeterBehavior Technician1568036549
  41. Hosna GhafooriBehavior Technician1750062618
  42. Hanan GhanemBehavior Technician1932036373
  43. Manjit Ghangas, FNPFamily Nurse Practitioner1164568366
  44. Banafsheh Ghassemi, PHARMDPharmacist1093963258
  45. Margo GhattasPharmacist1487120887
  46. Kamal Ghei, M.D.Internal Medicine Physician1366490120
  47. Darcie Ghigiarelli, FNPFamily Nurse Practitioner1164093753
  48. Julianne Ghiglieri-Cole, IBCLC, MA, CCC-SLPLactation Consultant (Non-RN)1013535525
  49. Mirette GhobrialPharmacist1427797950
  50. Nourollah Ghorbani, M.D.Specialist1508970682

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.