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 28 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. Epifanio Deleon, M.D.Internal Medicine Physician1124194907
  2. Javier Deleon, M.D.Internal Medicine Physician1598833790
  3. Michaela DeleonBehavior Technician1437846797
  4. Natalie Delfavero, MDFamily Medicine Physician1689258048
  5. Eva Delgado, BABehavior Technician1962033738
  6. Rosemary DelgadoObstetrics & Gynecology Physician1235140500
  7. Sarahi DelgadoBehavior Technician1639027386
  8. Monique Delisser, M.D.Internal Medicine Physician1578925087
  9. Jayrod Delos AngelesPhysical Therapy Assistant1487291423
  10. David Demartini, M.D.Ophthalmology Physician1437134855
  11. Gayle Dendaas, M.A. M.F.T. C.H.T.Marriage & Family Therapist1285867606
  12. Donald Dendinger, MPTPhysical Therapist1841402039
  13. Calvin Deng, MDInternal Medicine Physician1326126491
  14. Kenneth DenhardPharmacist1750655130
  15. Camille Denton, M.A.Behavior Technician1457652034
  16. Stephen Dentone, O.D.Optometrist1811026552
  17. Joann Depetro, M.A., MFTMarriage & Family Therapist1306274485
  18. Agnieszka Depinska, MS, RDRegistered Dietitian1275168684
  19. Stefanie DerrickBehavior Technician1295219335
  20. James Derum, PA-CPhysician Assistant1447355474
  21. Toral Desai, P.T.Orthopedic Physical Therapist1235361445
  22. Renee Desoucy, NPFamily Nurse Practitioner1558794909
  23. Ryann DesouzaMarriage & Family Therapist1043493042
  24. Robert Deutscher, M.D.Cardiovascular Disease Physician1467509299
  25. Margaret Devane, MSAudiologist-Hearing Aid Fitter1912051392
  26. Matthew Devane, DOCardiovascular Disease Physician1770511040
  27. John Deverman, D.D.S.General Practice Dentistry1487866265
  28. Michelle Devito, M.S. CCC-SLPSpeech-Language Pathologist1568607810
  29. Aubree Devree, MSWSocial Worker1215368618
  30. Whitney Dewalt, M.D.Obstetrics & Gynecology Physician1720382286
  31. Alexia DextreBehavior Technician1851265300
  32. Amrita Dhaliwal, MDInternal Medicine Physician1164500740
  33. Riaz Dhanani, MDDiagnostic Radiology Physician1770770257
  34. Shandeep DhillonBehavior Analyst1043889272
  35. Donna Di Cenzo, MDObstetrics & Gynecology Physician1710039524
  36. Alyssa Di Dio, M.S.Behavior Technician1457826117
  37. Julia Di Rienzo, MFTMarriage & Family Therapist1003056631
  38. Felisha DiasBehavior Technician1437812435
  39. Karen DiazClinical Social Worker1497239305
  40. Mikayla DiazBehavior Technician1114704434
  41. Ryan DiazBehavior Technician1356156210
  42. Rafael Diaz Flores, M.D.Surgery Physician1619056561
  43. Karla Diaz RodriguezBehavior Technician1154139822
  44. Judith Diaz SierraBehavior Analyst1891394151
  45. Natalie Dicks, IBCLC, RNCLactation Consultant (Registered Nurse)1164010948
  46. Cole DicksonAssistant Behavior Analyst1548723315
  47. April Diep, DOFamily Medicine Physician1871933895
  48. Christina Diep, DDSPediatric Dentistry1457882789
  49. Benjamin Dierauf, L.AC.Acupuncturist1164578811
  50. Keren Dietz Roberts, PMHNPPsychiatric/Mental Health Nurse Practitioner1487319786

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.