NPPES file of Aug 9, 2026

Doctors and health care providers in Fairfield, CA

3,595 individual NPPES records list a practice address in Fairfield, 62nd of 812 California cities. The largest group is behavior technician: 696, 19% of the city's records, against 18% across California. Page 16 of 72.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

The 8 largest groups in Fairfield

  1. Behavior Technician696
  2. Marriage & Family Therapist221
  3. Addiction (Substance Use Disorder) Counselor173
  4. Counselor134
  5. Clinical Social Worker129
  6. Mental Health Counselor124
  7. Adult Companion111
  8. Registered Nurse108

Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.

Fairfield in California

  • Rank in California62nd of 812 cities by records
  • Share of the state0.4% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups30.3% of all records

Compared with California as a whole, Fairfield has 14.3× the state's share of adult companion records and 0.51× its share of student in an organized health care education/training program records.

Providers in Fairfield, alphabetically

  1. Leticia De La Cruz Salas, LCSWClinical Social Worker1508927765
  2. Jeanett De La MoraBehavior Technician1669008512
  3. Claudia De La Ossa, AODAddiction (Substance Use Disorder) Counselor1477433290
  4. Melani De La Vega, RNRegistered Nurse1417137456
  5. Priscilla De LeonMental Health Counselor1346300480
  6. Victor De LeonMilitary Health Care Provider1598551020
  7. Jessica Lorraine De Los SantosBehavior Technician1316538317
  8. Michelle De MercadoSpecialist1053101329
  9. Vicente De Ocampo, D.M.D.General Practice Dentistry1346308970
  10. Cassandra De Vita, LCSWSocial Worker1417381526
  11. Autumn Deal, MABehavior Analyst1851413496
  12. Shalon DeanAdult Companion1578072849
  13. Sadek DebwanNeurology Physician1396368585
  14. Mykala DechantBehavior Technician1780252163
  15. Denise DeclinesBehavior Technician1992280853
  16. Brandon DecostaBehavior Technician1255807038
  17. Anjali Dedhia, O.D.Optometrist1427483494
  18. Andrea Del CarloMental Health Counselor1477606960
  19. Melissa Del Prado, BSN, RNCase Management Registered Nurse1568283968
  20. Bridgette Del ValleAdult Companion1841140910
  21. Jairin Dela Cruz, M.D.,BCBABehavior Analyst1447611207
  22. Johfanermay Dela CruzBehavior Technician1548009376
  23. Armina DelacruzCommunity Health Worker1235754706
  24. Carmencita Delacruz, RRT, NPS, BS BIOLOGYNeonatal/Pediatric Certified Respiratory Therapist1689138380
  25. Susan DelaneyCommunity Health Worker1063114387
  26. Timothy DelaneyRehabilitation Practitioner1881413011
  27. Marifel DelcoBehavior Technician1124785035
  28. Maria Deleon-Tallman, M.D.Pediatrics Physician1396770251
  29. Adriana Delgadillo, PSY.D.Psychologist1487136453
  30. Patricia DelgadilloDay Training/Habilitation Specialist1720941479
  31. Cosette Delgado, ASWMental Health Counselor1538454616
  32. Ellia DelgadoCase Manager/Care Coordinator1043867237
  33. Jonathan Delgado-Lopez, PA-CPhysician Assistant1548738198
  34. Meagan Della ZoppaBehavior Technician1033796990
  35. Benjamin Paul Delos ReyesAssistant Behavior Analyst1730968645
  36. Chelsea Delos SantosLicensed Psychiatric Technician1841785128
  37. Florinda Delrosario, DMD,DDS.General Practice Dentistry1043361223
  38. Kathy Demaggio, RDRegistered Dietitian1518027309
  39. Primadona DemapendanStudent in an Organized Health Care Education/Training Program1699082214
  40. Jessica DemariaSocial Worker1134990732
  41. Marc Dematteo, RADT IAddiction (Substance Use Disorder) Counselor1578106076
  42. Philippe Denayer, PHARM.D.Pharmacist1356695746
  43. Donald Denmark, MD, FAAFPFamily Medicine Physician1942351135
  44. David Dennis, M.D.Emergency Medicine Physician1730116799
  45. De'Sean DennisCase Manager/Care Coordinator1023799210
  46. Kalpana DeoRegistered Nurse1427597129
  47. Elizabeth Deol, LCSWSocial Worker1578239711
  48. Navneet Deol, DOFamily Medicine Physician1144809575
  49. Jasmine Grace DerBehavior Technician1992656854
  50. Anna Derdzinska, MDPediatrics Physician1578650883

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

Fairfield, California appears in the CMS National Plan and Provider Enumeration System with 3,595 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 Fairfield - 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 Fairfield 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 Fairfield is weighted toward Behavior Technician (696 clinicians, followed by Marriage & Family Therapist with 221 and Addiction (Substance Use Disorder) Counselor with 173). 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, Fairfield reports roughly 9.2 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.

For Fairfield 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 Fairfield, CA?

There are 3,595 registered healthcare providers in Fairfield, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Fairfield?

The most common specialties in Fairfield are Behavior Technician, Marriage & Family Therapist, Addiction (Substance Use Disorder) Counselor, Counselor, Clinical Social Worker. Behavior Technician has the most providers with 696.

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.