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 29 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. Hao Dieu, PHARMDPharmacist1508341744
  2. Ethan DikeBehavior Technician1063168144
  3. Lawrence Diller, M.D.Developmental - Behavioral Pediatrics Physician1912921180
  4. Martin Diller, LMFTMarriage & Family Therapist1174321087
  5. Cathy DillonBehavior Technician1205625357
  6. Tracy DillonBehavior Technician1962907154
  7. Vincent Dimaggio, M.D.Specialist1215959366
  8. Thu Dinh, RPHPharmacotherapy Pharmacist1619415981
  9. Steven Dinstell, MDPediatrics Physician1659459717
  10. Joseph Dintino, LCSWClinical Social Worker1306140744
  11. Jennifer Dion-Gokan, FNPNurse Practitioner1831634708
  12. Brigitte Anne DionisioBehavior Technician1609565621
  13. Catherine Dionisio, PH.D.Clinical Psychologist1730365248
  14. Carol Diraimondo, MDNephrology Physician1265433288
  15. Yalina Disla, MD, MPHEmergency Medicine Physician1225458227
  16. Kamilla DistefanoChore Provider1043663305
  17. Kurt Dittmar, MDAnesthesiology Physician1003858697
  18. Bea Nicole DiumanoBehavior Technician1780555078
  19. Rashmi Dixit, M.D.Rheumatology Physician1811990666
  20. Deashia DixonBehavior Technician1831761527
  21. Levon Djenderedjian, MDOphthalmology Physician1952756256
  22. Anh Do, MDObstetrics & Gynecology Physician1548362122
  23. Christina DoPharmacist1558893214
  24. Duy Do, M.D.Anesthesiology Physician1386039584
  25. Lan Do, FNP-CFamily Nurse Practitioner1760337216
  26. Chau DoanBehavior Technician1568125482
  27. Deborah Doberne, MDInternal Medicine Physician1184916082
  28. Alfred Dobrow, MDOphthalmology Physician1497833586
  29. Megan Dodson, PA-CPhysician Assistant1750720850
  30. Danielle DoedensBehavior Technician1366817710
  31. Janice Dolan, MSN/FNPFamily Nurse Practitioner1982680864
  32. Nicole Doll, HIGH SCHOOL DIPLOMABehavior Technician1518226406
  33. Danielle Dollinger, PSYDClinical Psychologist1427678127
  34. Jared DomaguingNurse Practitioner1609657741
  35. Maria Domantay, MDHospitalist Physician1003994195
  36. Katrina Domingo, PSY.D.Psychologist1023325792
  37. Stacey DomingoBehavior Technician1669179099
  38. Elizabeth Domingos-Shepard, LMFTMarriage & Family Therapist1194877852
  39. Crystal Dominguez, PHARM D.Pharmacist1750566527
  40. Elijah DominguezBehavior Technician1558205922
  41. Jessica DominguezAthletic Trainer1154853463
  42. Patricia Dominguez DominguezBehavior Technician1639807076
  43. Diane Domondon, RPHPharmacist1114580669
  44. Anne Donegan, DOPediatrics Physician1194420158
  45. Elizabeth Donnelly, RN, CNM, WHNPAdvanced Practice Midwife1225402332
  46. Claire Donovan, CNMMidwife1174403679
  47. Vernon DooleyMarriage & Family Therapist1366218869
  48. Meena Dopp, MDInternal Medicine Physician1710447925
  49. Veselina DoradoBehavior Technician1386457307
  50. Maryam Doroudian, DDSGeneral Practice Dentistry1821018722

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.