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 71 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. Cheyenne MathisBehavior Technician1639764921
  2. Nina Symone MathisBehavior Technician1255268926
  3. Archana Mathur, MDPediatric Endocrinology Physician1528146685
  4. Adam Matichak, DPTPhysical Therapist1629438056
  5. Abdullah MatieeAssistant Behavior Analyst1124595830
  6. Aesha Matiee, M.S BCBABehavior Analyst1558869362
  7. Paresh Matmari, M.D.Hospitalist Physician1881603306
  8. Christopher Matock, D.C., C.C.S.P.Chiropractor1497929129
  9. Nathan Matsubara, PHARMDPharmacist1538613393
  10. Maki Matsumura, NP-CNurse Practitioner1013316488
  11. Chris Matsunaga, DDSDentist1912117540
  12. Robert Matthews, M.D.Nuclear Radiology Physician1215963186
  13. Timothy Matthiessen, RDRegistered Dietitian1972276475
  14. James MattinglyGeneral Practice Dentistry1245329408
  15. Randeep Mavi, M.D.Family Medicine Physician1114158086
  16. Linda Maxey, CNMAdvanced Practice Midwife1528124526
  17. Japria MaxwellMental Health Counselor1629955984
  18. Melissa May, DPTPhysical Therapist1568174779
  19. Robin May, CRNACertified Registered Nurse Anesthetist1780740878
  20. Stephanie May, BABehavior Technician1811538143
  21. Trevor MayeauBehavior Technician1437858339
  22. Lisa Mayhugh, PT, CMTPhysical Therapist1487708434
  23. Florcena Mayo, CRNACertified Registered Nurse Anesthetist1740477462
  24. Robert Mayo, MDObstetrics & Gynecology Physician1811042807
  25. Meagan MazanyBehavior Analyst1578125290
  26. Martin Mazar, MDCritical Care Medicine (Internal Medicine) Physician1962580043
  27. Kathleen Mazolewski, MFT, PTMarriage & Family Therapist1881227130
  28. Peter Mazolewski, M.D.Surgery Physician1710076773
  29. Amanda McAllister, PHARMDPharmacist1891843991
  30. Teri McAllisterBehavior Technician1790528099
  31. Shelly McArdleBehavior Technician1851024558
  32. Gloria McBethSpeech-Language Pathologist1659771087
  33. Shannon McCabe, M.D.Cornea and External Diseases Specialist Physician1407210362
  34. Shannon McCabe, AU.D.Audiologist1568381119
  35. Megan McCaleb, PA-C, MSPAS, MPHSurgical Physician Assistant1467803965
  36. Heather McCall, MFTMarriage & Family Therapist1891336517
  37. Timothy McCalmont, M.D.Dermatopathology (Pathology) Physician1275598732
  38. Patricia McCarley, RN NPNurse Practitioner1801897723
  39. Nicholas McCarthyBehavior Analyst1912209040
  40. Brittany McClanahanBehavior Technician1053884643
  41. Evan McClureBehavior Technician1952918138
  42. Claire McCormickBehavior Technician1235958083
  43. Caitlyn McCoy, RD, CNSDRegistered Dietitian1619018777
  44. G. McCrea, MS, ARNP, BC, FNPFamily Nurse Practitioner1609960780
  45. Brendan McCullough, MDDiagnostic Radiology Physician1497954317
  46. Brandon McCutcheon, MDNeurological Surgery Physician1093195380
  47. Sophia McDadeCommunity Health Worker1467293936
  48. Roxanne McDaniel, MDInternal Medicine Physician1457439937
  49. Polina McDermott, PHARMDPharmacist1386230811
  50. Melissa McDonough, OTROccupational Therapist1629569256

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.