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 95 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. Kaitlyn Routzen, CNM, WH-NPAdvanced Practice Midwife1629796263
  2. Linda Row, MDInternal Medicine Physician1730251554
  3. Peter Rowe, M.D.Hospitalist Physician1700831922
  4. Julia Rowland, FNPFamily Nurse Practitioner1154003499
  5. Michael Roy, O D INCOptometrist1770577892
  6. Chelsea Royal-HannBehavior Technician1881489177
  7. Pamela Roza-BohrkBehavior Technician1891433108
  8. Ezgi Rozenshteyn, LMFTMarriage & Family Therapist1629653191
  9. Blanca RuanBehavior Technician1922590025
  10. Susan Rubenfeld, LCSWClinical Social Worker1225872229
  11. Mark Rubenstein, M.D.Specialist1992876403
  12. Hope Rubin, PAMedical Physician Assistant1851352355
  13. Erika RubioBehavior Technician1295340255
  14. Margaret RubioPharmacist1649701202
  15. Patricia RubioBehavior Technician1386406106
  16. Reid Rubsamen, MDAnesthesiology Physician1073549499
  17. Carenda RudisMassage Therapist1801400478
  18. Susan Rudloff, M.A.Marriage & Family Therapist1093162612
  19. Craig Rudnick, MDPsychiatry Physician1184831661
  20. Kimberly RuedasBehavior Technician1215635107
  21. Nancy RuelasAssistant Behavior Analyst1912470634
  22. Maria Sabina RuffinelliBehavior Technician1326763129
  23. Adriana RuizBehavior Technician1164999496
  24. Delaney RuizBehavior Technician1821742602
  25. Karen RuizBehavior Technician1922714435
  26. Stephanie Joy RuizAssistant Behavior Analyst1295259521
  27. Monica Ruiz Durant, MDInternal Medicine Physician1750433587
  28. Edgar Dan Ruiz TiradoBehavior Technician1194618660
  29. Sofia Ruiz-LopezBehavior Technician1174121669
  30. Liane Rumsey, ODOptometrist1588680912
  31. Carl Runyon, D.M.D.Oral and Maxillofacial Surgery (Dentist)1215036710
  32. Theresa Runyon, RN NPRegistered Nurse1316948235
  33. Michael RupertBehavior Technician1013871516
  34. Sarah Rusch, M.DPediatric Emergency Medicine (Pediatrics) Physician1912261611
  35. Michael Ruscio, D.C.Internist Chiropractor1821369166
  36. Joel RushMarriage & Family Therapist1538498795
  37. Philip Rush, M.D.Pediatrics Physician1922023993
  38. Adriana Russell, M.S., MFTMarriage & Family Therapist1447268875
  39. Jordan RussellBehavior Technician1720721913
  40. Rashad RussellBehavior Technician1447911797
  41. Sonora Russell-GarrisBehavior Technician1780551960
  42. Michael Russin, MDHematology & Oncology Physician1063590156
  43. Kevin RustPhysical Therapist1881573194
  44. Wilfred RustonPersonal Care Attendant1508522194
  45. Victoria RuvalcabaBehavior Technician1205795606
  46. Raymond Ruzicano, M.D.Psychiatry Physician1811062508
  47. Bridget RyanBehavior Technician1396568440
  48. Patrick Ryan, MDDiagnostic Radiology Physician1760638118
  49. Margaret Ryerson, MFTMarriage & Family Therapist1235301060
  50. John Ryu, MDAnesthesiology Physician1497783021

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.