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 23 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. Cayla ColemanBehavior Technician1649970567
  2. Lauren CollBehavior Analyst1396310421
  3. Michele Collier, MDAnesthesiology Physician1871537324
  4. Justin Collingham, M.D.Maternal & Fetal Medicine Physician1346382314
  5. George Collins, MAAddiction (Substance Use Disorder) Counselor1548696297
  6. Missiah CollinsBehavior Technician1184463242
  7. Claudia ColombanyBehavior Technician1669026043
  8. Corinne ColomboAcute Care Nurse Practitioner1679080071
  9. Kimberly Colon, PHYSICAL THERAPISTPhysical Therapist1104975846
  10. Brienne Colton, CRNACertified Registered Nurse Anesthetist1851751457
  11. Lori Comer, LMFTMental Health Counselor1033951504
  12. Eugenie ComoEmergency Medicine Physician1679078786
  13. Connie Concannon, MSWClinical Social Worker1396952859
  14. Estefani Conde VargasBehavior Analyst1598220956
  15. Mary Conklin, NPGerontology Nurse Practitioner1366526840
  16. Dennis ConleyCertified Registered Nurse Anesthetist1790944015
  17. Shelby ConnBehavior Technician1376102145
  18. Sydney ConnBehavior Technician1063096485
  19. Sarah Connell, M.D.Otology & Neurotology Physician1184816977
  20. Catherine Conner RamosMarriage & Family Therapist1811366446
  21. Angelita Connolly, MOTLCommunity Health Worker1659780930
  22. Ronald Connolly, FNPFamily Nurse Practitioner1710296116
  23. Sylvia Connolly, MDInternal Medicine Physician1578641668
  24. Thomas Connolly, MDInternal Medicine Physician1750469821
  25. Douglas Connor, NPFamily Nurse Practitioner1700135365
  26. Jason ConradBehavior Technician1215603667
  27. Aliyah ContrerasBehavior Analyst1437758646
  28. Carlos Contreras, M.D.Psychiatry Physician1528325412
  29. David Contreras, M.D.Orthopaedic Surgery Physician1821048216
  30. Jessica ContrerasBehavior Technician1871476200
  31. Mila ContrerasBehavior Technician1912632456
  32. Marryann ContridasBehavior Technician1245955509
  33. Monica Conway, LMFTMarriage & Family Therapist1548640667
  34. David Cook, MDAllergy & Immunology Physician1740282425
  35. Dylan CookBehavior Technician1285207688
  36. Ian Cook, PH DPsychologist1861105850
  37. Juliane Cook, PHDMarriage & Family Therapist1154011658
  38. Karen Cook, LMFTMarriage & Family Therapist1730655853
  39. Keith Cook, PTPhysical Therapist1871660225
  40. Kristina Cook, M.S.; LPCC; NCCProfessional Counselor1669013165
  41. Laura Cook, PT, CSCSOrthopedic Physical Therapist1396122560
  42. Nancy Cook, NPAdult Health Nurse Practitioner1639314719
  43. Sarah Cook, OTNeurorehabilitation Occupational Therapist1932586690
  44. Lauren Cooke, M.D.Emergency Medicine Physician1770019259
  45. Robert Cooke, DPMPodiatrist1487732970
  46. Marina CoopBehavior Technician1306418967
  47. Ami CooperSocial Worker1558012344
  48. Mallory Cooper, RDNRegistered Dietitian1205560505
  49. Mercedes CooperBehavior Technician1235632571
  50. Karmin Copen, PSY.D.Clinical Psychologist1801028113

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.