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 80 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. Tom Nguyen, M.D.Hospitalist Physician1144269382
  2. Van NguyenBehavior Technician1891401543
  3. Victor NguyenBehavior Technician1528831633
  4. Vincent NguyenPharmacist1447108022
  5. Vinh Nguyen, PHARMDPharmacist1548785090
  6. Vivien Nguyen, M.D.Pediatric Gastroenterology Physician1154586659
  7. Yoko Nguyen, PHARM.D.Pharmacist1780740324
  8. Tram Nhan, PHARMDPharmacist1336574235
  9. Bryan NicholasBehavior Technician1528642113
  10. Coryn Nicholls, PA-CPhysician Assistant1487832739
  11. Nicole NicholsBehavior Technician1568183879
  12. Sarah Nichols, CNMMidwife1023179983
  13. Shante Nichols-Lockwood, OTR/LOccupational Therapist1174567796
  14. Renee Nickerson, MA. EDS. PPSPSchool Psychologist1750218863
  15. Florinda Nicolas, RNFARegistered Nurse1477067023
  16. Brooke NielsenBehavior Technician1619767282
  17. Marilyn Nikkari, MS SLP CCCSpeech-Language Pathologist1437307469
  18. Robin NilssonCase Manager/Care Coordinator1174008296
  19. Karl NimtzEmergency Medicine Physician1417535600
  20. Debra NippPediatric Neurodevelopmental Disabilities Physician1306406467
  21. James Nirenstein, PH.D. M.F.T.Marriage & Family Therapist1699794156
  22. David Nisenboym, DDSDentist1821425166
  23. Andrea Nishimi, LMFT, LPCCMarriage & Family Therapist1629762489
  24. Midori Nishio, M.D.Rheumatology Physician1316010366
  25. David Niver, MDObstetrics & Gynecology Physician1407934573
  26. Marina Niznik, PHDPsychologist1558138701
  27. Savannah NjugunaBehavior Technician1366914962
  28. Blessing NmereoleBehavior Technician1972297695
  29. John Noakes, DDSDentist1770704314
  30. Jeri NoblePhysical Therapist1750542882
  31. Sarah Noble, N.P.Women's Health Nurse Practitioner1609996263
  32. Caitin NobrigaBehavior Analyst1730681131
  33. Emily Nock, MDInternal Medicine Physician1881772986
  34. Alexis NolanBehavior Technician1518462993
  35. Erin Nolan, DOPhysical Medicine & Rehabilitation Physician1417575283
  36. Darryl Nomura, PHARMDPharmacist1861976680
  37. Maryam Noorivaziri, D.C.Chiropractor1609017813
  38. Morvarid Noorivaziri, D.C.Chiropractor1871267724
  39. Laura Norberg, MM, MT-BCMusic Therapist1992965099
  40. Darby Nordin, PT, DPTOrthopedic Physical Therapist1811523020
  41. Madison NordmanNurse Practitioner1205408168
  42. Cazeaux Nordstrum, MAMarriage & Family Therapist1417786120
  43. Robert Noriega, M.D.Internal Medicine Physician1922043249
  44. Pearl Gillian Norimoto, OTHand Occupational Therapist1700512555
  45. Sharon Norman, MFTMarriage & Family Therapist1275737603
  46. Shannon NornholdBehavior Technician1245894393
  47. Igor Nosovitskiy, MS, CPTStudent in an Organized Health Care Education/Training Program1275979486
  48. Robert Noth, M.D.Endocrinology, Diabetes & Metabolism Physician1831172972
  49. Paul Nottingham, M.D.Orthopaedic Surgery Physician1659390920
  50. Keyvan Nouri, M.D.Diagnostic Radiology Physician1184664997

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.