NPPES file of Aug 9, 2026

Doctors and health care providers in Tustin, CA

2,221 individual NPPES records list a practice address in Tustin, 97th of 812 California cities. The largest group is marriage & family therapist: 276, 12% of the city's records, against 6% across California. Page 11 of 45.

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

The 8 largest groups in Tustin

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

Tustin in California

  • Rank in California97th of 812 cities by records
  • Share of the state0.2% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups29.5% of all records

Compared with California as a whole, Tustin has 3.4× the state's share of chiropractor records and 0.70× its share of behavior technician records.

Providers in Tustin, alphabetically

  1. William DennyOrthodontics and Dentofacial Orthopedics Dentistry1811102965
  2. Kellie Derifield, MA, LMFTMarriage & Family Therapist1265939243
  3. Megan DerksenBehavior Technician1538018148
  4. Hiral Desai, DDSDentist1770129926
  5. Naman DesaiOral and Maxillofacial Surgery (Dentist)1689040115
  6. Courtney Deshetler, PSYDClinical Psychologist1972146108
  7. Brian Dewey, D.C.Chiropractor1801131370
  8. Manjot DhaliwalBehavior Technician1730751967
  9. Jennifer DialSpecialist1487073284
  10. Anahi DiazDay Training/Habilitation Specialist1053204453
  11. Jovanny DiazBehavior Technician1770279184
  12. Margaret Diaz, LCSWClinical Social Worker1205234044
  13. Alayjia DicksonBehavior Analyst1326929993
  14. Ria DiddeeMarriage & Family Therapist1063384170
  15. Be Diep, D.C., ATCChiropractor1902684004
  16. Natalia Dilday, RNFARegistered Nurse First Assistant1962914226
  17. Jenni Dillman, B.A.Social Worker1841523933
  18. Rita Dimatteo, RBTBehavior Technician1700753043
  19. Amy DinhBehavior Technician1194459040
  20. Christina Dinh, ASWSocial Worker1023805108
  21. Thaikhanh Dinhluu, DCChiropractor1538287487
  22. Samantha Dino, MFTMarriage & Family Therapist1669966404
  23. Evelyn Divinagracia, M.S. CCC-SLPSpeech-Language Pathologist1104358175
  24. John Djerbaka, P.T.Physical Therapist1003156126
  25. Carmen Do, COTAOccupational Therapy Assistant1801660543
  26. Jacqueline Do, M.D.Internal Medicine Physician1689646952
  27. Kevin Do, M.D.Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician1104078880
  28. Peter Do, PHARMDPharmacist1093229676
  29. Teresa DoBehavior Technician1134959661
  30. Duc Doan, PHARMDPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1528557576
  31. Miguel Dominguez, M.D.Pain Medicine (Anesthesiology) Physician1235170556
  32. Victoria Dominguez Ashimine, MFTMarriage & Family Therapist1033306212
  33. Alana DonckelsBehavior Analyst1659133080
  34. Stephen Donoghue, DDSGeneral Practice Dentistry1770161747
  35. Ashley DonohoeBehavior Analyst1801613567
  36. Monica DonosoSpeech-Language Pathologist1598174369
  37. Norma Donovan, LMFTMarriage & Family Therapist1295964252
  38. Robin Dore, MDRheumatology Physician1619972510
  39. Rebecca Dorfman, LMFTMarriage & Family Therapist1245888296
  40. Maureen Dornan, D.D.S.General Practice Dentistry1477559896
  41. Lucia Doshi, RD/RDN, MPHRegistered Dietitian1487194130
  42. Derek Du, DPTPhysical Therapist1588275762
  43. Hung Du, PHARM.D.Pharmacist1861785743
  44. Maryanne Duan, LMFTMarriage & Family Therapist1558649699
  45. Xumin DuanAcupuncturist1245009828
  46. Dawn Duckworth-Ouellet, LMFTMarriage & Family Therapist1376884247
  47. Hayley DukeBehavior Technician1538820659
  48. Britanny DuongBehavior Technician1629655055
  49. Huong Duong, M.D.Internal Medicine Physician1013020437
  50. Vy Duong, O.D.Optometrist1326103276

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

Tustin, California appears in the CMS National Plan and Provider Enumeration System with 2,221 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 Tustin - 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 Tustin 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 Tustin is weighted toward Marriage & Family Therapist (276 clinicians, followed by Behavior Technician with 273 and Clinical Social Worker with 106). 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, Tustin reports roughly 5.7 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 Tustin practice address, a coverage gap Tustin patients typically fill by traveling to a larger nearby hub.

For Tustin 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 Tustin, CA?

There are 2,221 registered healthcare providers in Tustin, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Tustin?

The most common specialties in Tustin are Marriage & Family Therapist, Behavior Technician, Clinical Social Worker, General Practice Dentistry, Chiropractor. Marriage & Family Therapist has the most providers with 276.

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.