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 42 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. Lindsay GordonAddiction (Substance Use Disorder) Counselor1205268570
  2. Lloyd Gordon, MDDiagnostic Radiology Physician1205915972
  3. Sierra GordonBehavior Technician1033701362
  4. Pedro GorrioBehavior Technician1720945546
  5. Werner Gottlieb, MSW,LCSWMental Health Counselor1558382044
  6. Theron Goudeau, F.N.P.Nurse Practitioner1275928756
  7. Carly Gould, MA, AMFTMarriage & Family Therapist1851137715
  8. Poornima Goyal, M.D.Internal Medicine Physician1912933706
  9. Shikha Goyal, PA-CPhysician Assistant1255003489
  10. Lois Gradwell, MFTMarriage & Family Therapist1811968860
  11. Claudia Graetsch-Vasquez, RD, CDERegistered Dietitian1831740232
  12. Breanna GraggBehavior Technician1376395202
  13. Jill GrahamMarriage & Family Therapist1982897278
  14. Dale Grahn, MDInternal Medicine Physician1588742662
  15. Thorsten Grambow, LMT, CMTMassage Therapist1154568590
  16. Stefan GranOrthotic Fitter1598952764
  17. Margarita GranadosBehavior Technician1023946613
  18. Madison GrangerBehavior Technician1184487746
  19. Lorraine Granit, PH.D.Psychologist1841212990
  20. Caitlyn GrantStudent in an Organized Health Care Education/Training Program1962378414
  21. Douglas Grant, MDPain Medicine Physician1922002542
  22. Jerriann Grant, MFTMarriage & Family Therapist1942330162
  23. Kathleen Grant, PHYSICIAN ASSISTANTSurgical Physician Assistant1700125440
  24. Venice Grant, PSYDPsychologist1366019168
  25. Claire GratzBehavior Technician1467928085
  26. Trent Graves, DDSGeneral Practice Dentistry1215943170
  27. Jacqueline Gray, M.A., MFTMarriage & Family Therapist1770701393
  28. Kaylynn GrayBehavior Technician1184465346
  29. Miles GrayBehavior Technician1376398388
  30. Jazmine GraysBehavior Technician1063122679
  31. Tamara GraysonStudent in an Organized Health Care Education/Training Program1336773761
  32. Alexandria Grechko, PA-CPhysician Assistant1447619051
  33. Justine GreenBehavior Technician1992209548
  34. Lori Green, MFTMarriage & Family Therapist1326495268
  35. Margot Green, PH.D.Addiction (Substance Use Disorder) Psychologist1205993029
  36. Ryan Green, M.D., PH.D.Anesthesiology Physician1730375791
  37. Janice Greenberg, R.N.,N.P.Family Nurse Practitioner1942372297
  38. Audrey GreenlawBehavior Technician1265367213
  39. Julie Greenlaw, DDSDentist1598113029
  40. Zacharia Greenlee, PA-CPhysician Assistant1427469097
  41. Kenneth GreenwellBehavior Technician1023808656
  42. Laura Greenwood, DONeurology Physician1588168769
  43. Deborah Greer, M.D.Family Medicine Physician1003851858
  44. Tatiana GreerAcupuncturist1801686761
  45. Alicia Grefenson, PSYD, LPClinical Psychologist1073707451
  46. Kenneth Gregg, LCSWClinical Social Worker1811048671
  47. Shelby GreggBehavior Technician1376050740
  48. Aileen Gregorio, PHARM.D.Pharmacist1932301231
  49. Maria GregorySchool Psychologist1487903613
  50. William Greif, MDSurgery Physician1013095108

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.