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 94 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. Katherine Roller, M.D.Family Medicine Physician1093755563
  2. Linda Rollins, NP, MSAdult Health Nurse Practitioner1265424113
  3. Merritt Rollins, LCSWClinical Social Worker1134934268
  4. Nancy Rolnik, M.D.Sports Medicine (Family Medicine) Physician1710083654
  5. Tarashmani RomanaBehavior Analyst1811595200
  6. Karen Romano, CRNACertified Registered Nurse Anesthetist1629215934
  7. Lorraine Romano, BCBABehavior Analyst1366864464
  8. Daniel RomeSpecialist1609573690
  9. Howard Rome, PHDRehabilitation Psychologist1003810607
  10. Raul Romea, MDRheumatology Physician1962408112
  11. Andrea RomeroBehavior Technician1811683212
  12. Ariana Patrice RomeroBehavior Technician1578358867
  13. Kimberely Romero Palacios, BSBehavior Technician1235747528
  14. Yamileth Romero RodriguezBehavior Technician1184301327
  15. Diego Romero-GarciaBehavior Technician1164376018
  16. Irma Romero-PeredoPsychologist1710468152
  17. Paige Roming, LVNLicensed Vocational Nurse1912884677
  18. Lily RonBehavior Technician1841131752
  19. Elizabeth RoperBehavior Technician1568181360
  20. Alyssa RosadoBehavior Technician1831065804
  21. Elvi RosalesBehavior Technician1164284980
  22. Emilia RosalesBehavior Technician1184277188
  23. Gisele RosalesBehavior Technician1558289850
  24. Samantha RosalesBehavior Technician1154202497
  25. Corerina RosalezBehavior Technician1104561018
  26. Joshua RosarioBehavior Technician1548136385
  27. Joseph Roscoe, LCSWClinical Social Worker1235365362
  28. Joseph Rose, MDObstetrics & Gynecology Physician1245492925
  29. Rose Rose, R.N. IV C.G.R.N.Gastroenterology Registered Nurse1447456611
  30. Lorraine Rose-Lerman, CNMAdvanced Practice Midwife1376606772
  31. Matthew RosenBehavior Analyst1457139578
  32. Raymond Rosenbaum, MDUrology Physician1679651749
  33. Debbie RosenbergMarriage & Family Therapist1326622200
  34. Jacob Rosenberg, MDPain Medicine Physician1275537870
  35. Wendy RosenthalBehavior Technician1053281329
  36. Jeffrey RosethOrthodontics and Dentofacial Orthopedics Dentistry1144042706
  37. Michael Rosner, ODOptometrist1669968095
  38. Francesca Ross, MDPediatrics Physician1063929404
  39. Susan Ross, MFTMarriage & Family Therapist1104092279
  40. William Ross, MDSports Medicine (Family Medicine) Physician1548312697
  41. John Rossi, MDEmergency Medicine Physician1437237518
  42. Lindsey Rossi, HIGH SCHOOL DIPLOMABehavior Analyst1063771954
  43. Olga Rotermund, NURSEGynecology Physician1164179586
  44. Anita Roth, MDPhysical Medicine & Rehabilitation Physician1104929793
  45. David Roth, MDEmergency Medicine Physician1598843161
  46. William RothBehavior Technician1578107348
  47. Barry Rotman, MDInternal Medicine Physician1528083599
  48. Helena Rouhe, LMFTMarriage & Family Therapist1669595096
  49. Tabitha RoundtreeBehavior Analyst1205389939
  50. Gierose RoussellBehavior Technician1760333124

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.