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 43 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. Cynthia Greif-Neill, LMFTMarriage & Family Therapist1497794853
  2. Kimberly Grelli, MDNeonatal-Perinatal Medicine Physician1255758512
  3. Raveen GrewalBehavior Technician1447931548
  4. Kathryn Grice, MDAnatomic Pathology Physician1063586378
  5. Brittany Griffin, M.A.Behavior Analyst1063713642
  6. Alexis Griffith, DCChiropractor1184333981
  7. Sean Griffiths, D.O.Orthopaedic Surgery Physician1457705667
  8. Laura GrigsbyBehavior Technician1699452466
  9. Kate Grillo, CCC-SLPSpeech-Language Pathologist1851769210
  10. Alejandra GrimaldoMarriage & Family Therapist1467094862
  11. Nicole GrimesBehavior Analyst1538654074
  12. Kristin GrimmBehavior Technician1629966304
  13. Jazmin GrisbyBehavior Technician1760054654
  14. Zoe GronertBehavior Technician1558232876
  15. Lora Groppetti, MS, MFTMarriage & Family Therapist1972632750
  16. Clemens Grosskinsky, PHD, MDReproductive Endocrinology Physician1235128315
  17. Matthew GrossmanBehavior Technician1114328754
  18. Katrina Groves-Rehwaldt, MDAddiction Medicine (Family Medicine) Physician1487748943
  19. Ashley Gruendl, P.T.Physical Therapist1588062442
  20. Anne Grzegorczyk, M.D.Pulmonary Disease Physician1720434004
  21. Katty GuardadoBehavior Technician1780441584
  22. Prathibha Gubbi Ravishankar, MDHospitalist Physician1528146693
  23. Caroline Gudorf, M.S.Student in an Organized Health Care Education/Training Program1295926335
  24. Jennifer Guerra, MAHealth & Wellness Coach1538029889
  25. Ofelia GuerraBehavior Technician1215414784
  26. Ricardo Guerra, M.D.Dermatology Physician1558867036
  27. Leticia GuerreroOccupational Therapist1205092749
  28. Rosario GuerreroBehavior Technician1669171559
  29. Marisol Guerrero-ChanBehavior Technician1336845098
  30. Joley Guevara, M.P.TPhysical Therapist1003057233
  31. Salvador Guevara, M.D.Surgery Physician1336427939
  32. Dawn Gugliellmino, LMFTMarriage & Family Therapist1376882423
  33. Anne Rachel Guijo, N.P.Family Nurse Practitioner1659898484
  34. Kourtney GuildBehavior Technician1437087806
  35. Tarannum Guller, MDInternal Medicine Physician1972532083
  36. Siena GunariBehavior Technician1730778168
  37. Xi GuoBehavior Technician1215412994
  38. Anurag Gupta, M.D.Clinical Cardiac Electrophysiology Physician1255520623
  39. Ravinder Gupta, MDHospitalist Physician1649358714
  40. Marie Guptill, LACAcupuncturist1447707922
  41. Noelle Gurnari, DMDGeneral Practice Dentistry1639912694
  42. Sophia GurskyBehavior Technician1366396210
  43. Shanthi GuruswamyBehavior Technician1245996438
  44. Joel Guss, MDOtolaryngology/Facial Plastic Surgery Physician1962568881
  45. Reyvie GutfeldBehavior Technician1245001924
  46. Alejandro GutierrezBehavior Technician1558918581
  47. Amy GutierrezBehavior Technician1962368159
  48. Cassandra Gutierrez, BA FINE ARTSBehavior Analyst1275877011
  49. Connie Gutierrez, P.T.Physical Therapist1457412793
  50. Francisco GutierrezOrthotic Fitter1962699215

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.