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 102 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. Joseph SifuentesBehavior Technician1730902784
  2. Richard Sigel, M.D.Diagnostic Radiology Physician1720020902
  3. Katelin SiggBehavior Technician1104756584
  4. Gagandeep Sihota, PHARMDPharmacist1952072563
  5. Katherine Silbermann, NP-CFamily Nurse Practitioner1518614783
  6. Esther SilvaBehavior Technician1588558506
  7. Marcelina Jasmine Silva, D.O.Interventional Pain Medicine Physician1942576350
  8. Michael Silva, MDStudent in an Organized Health Care Education/Training Program1609363621
  9. Valorie SilvaBehavior Technician1477178085
  10. Faith Silvani, PNPPediatric Nurse Practitioner1932258308
  11. Stephen Silvani, DPMPodiatrist1316025489
  12. Amanda Silver, PSYDClinical Psychologist1043404999
  13. Lisa Silver, LCSWClinical Social Worker1730571712
  14. Richard Silver, MDPsychiatry Physician1891873972
  15. Lori Silver-Favors, MFTMarriage & Family Therapist1720282064
  16. Meredith Silverman, MDInfectious Disease Physician1689802712
  17. Veronika Simanek, M.D.Internal Medicine Physician1174556500
  18. Serena SimlinBehavior Technician1447196399
  19. John Simmons, MDHematology & Oncology Physician1932287000
  20. Damari SimonBehavior Technician1861009045
  21. Jeanne Simon, PH.D.Clinical Psychologist1891915690
  22. Wina Simon, BS NURSINGBehavior Technician1437629599
  23. Latina SimpkinsBehavior Technician1386592038
  24. Mindy SinPharmacist1902338668
  25. Michael Sinclair, MDPediatrics Physician1851590764
  26. Jessica Singerman, PSY.D.Psychologist1083934525
  27. Anika SinghStudent in an Organized Health Care Education/Training Program1487189239
  28. Gurinder Singh, D.O.Internal Medicine Physician1063827301
  29. Gurpreet Singh, PHARM.DPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1053787069
  30. Gurvinder Singh, MDInternal Medicine Physician1629711619
  31. Jonathan Singh, MDDiagnostic Radiology Physician1861570368
  32. Kiran SinghBehavior Technician1164112595
  33. Ranjeeta SinghOrthotic Fitter1023205200
  34. Serena SinghBehavior Technician1649995051
  35. Simrita Singh, M.D.Psychiatry Physician1326286543
  36. Sonal Singh, D.D.S.General Practice Dentistry1285084020
  37. Ritu Singhal, M.D.Adult Medicine Physician1578521928
  38. Rajesh SinglaFamily Medicine Physician1801273701
  39. Madison SingleyBehavior Technician1740041128
  40. Trudy Singzon, M.D.Hospice and Palliative Medicine (Family Medicine) Physician1083745285
  41. Debina SinhaBehavior Technician1417668310
  42. Janet SinhbandithBehavior Analyst1013389832
  43. Melissa SitchonBehavior Technician1659856342
  44. Deneka SiuBehavior Technician1386287969
  45. John Siu, M.D.Anesthesiology Physician1922323492
  46. Swekha SivakumarBehavior Technician1598407561
  47. Stephen Skarda, D.C.Chiropractor1417942525
  48. Nicolas Skaric, M.D.Surgery Physician1497970107
  49. Frank Skiba, D.D.S.Dentist1255489407
  50. Danica Skibola, MDPsychiatry Physician1427289313

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.