NPPES file of Aug 9, 2026

Doctors and health care providers in Pasadena, CA

10,525 individual NPPES records list a practice address in Pasadena, 13th of 812 California cities. The largest group is behavior technician: 1,617, 15% of the city's records, against 18% across California. Page 47 of 211.

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

Pasadena in California

  • Rank in California13th of 812 cities by records
  • Share of the state1.1% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups34.4% of all records

Compared with California as a whole, Pasadena has 6.2× the state's share of rehabilitation practitioner records and 0.51× its share of general practice dentistry records.

Providers in Pasadena, alphabetically

  1. Berenis DiazBehavior Technician1497462543
  2. Dayanira DiazMental Health Counselor1083122584
  3. Desiree DiazBehavior Analyst1558078972
  4. Eliza DiazRehabilitation Practitioner1710397856
  5. Erica DiazCase Manager/Care Coordinator1750972642
  6. Inez DiazAddiction (Substance Use Disorder) Counselor1275220725
  7. Jasminelynn DiazBehavior Technician1316659915
  8. Javier DiazClinical Social Worker1831740877
  9. Jorge DiazDay Training/Habilitation Specialist1629589510
  10. King DiazFamily Nurse Practitioner1144841172
  11. Krystal DiazMental Health Counselor1245664093
  12. Luis DiazBehavior Analyst1508445198
  13. Maria DiazMarriage & Family Therapist1386392330
  14. Maria DiazBehavior Technician1477335370
  15. Michelle Diaz, LCSWClinical Social Worker1033581483
  16. Patricia Diaz, IMFMarriage & Family Therapist1639312887
  17. Robert Diaz, LCSWClinical Social Worker1952567745
  18. Roxana DiazBehavior Technician1538022298
  19. Sergio DiazAddiction (Substance Use Disorder) Counselor1376499913
  20. Valerie DiazBehavior Technician1609751965
  21. Marcela Diaz-Smoire, LMFTIMarriage & Family Therapist1861716722
  22. Steven DiceBehavior Technician1487261749
  23. Alexandra DickersonBehavior Technician1700514213
  24. Darlene Dickie, AMFTMarriage & Family Therapist1205653847
  25. Deanna Dickson, DOCTOR OF CHIROPRACTChiropractor1285792796
  26. Laura Dickson, LCSWClinical Social Worker1659312338
  27. Richard Diehl, M.D.Orthopaedic Surgery Physician1417943127
  28. Vivian Diep, L.AC.Acupuncturist1528390275
  29. Todd Dietrick, M.D.Adult Reconstructive Orthopaedic Surgery Physician1619963444
  30. William Dietrick, MDSpecialist1881712248
  31. Gina Digiovanni, N.P.Pediatric Nurse Practitioner1043350085
  32. Hildy Dimarzio, PSY.D., LCSWClinical Social Worker1528389905
  33. Giancarlo Dimassa, MDEmergency Medicine Physician1255370797
  34. Luis Dimen, M.D.Internal Medicine Physician1609843564
  35. Lesley Anne Dimson, COTA/LOccupational Therapy Assistant1083290167
  36. Paul Dinh, P.T.Physical Therapist1063702686
  37. America Dinsmore, LMFTMarriage & Family Therapist1811291271
  38. Caroline DionisioBehavior Technician1760108641
  39. Lauren Diramerian, LCSWClinical Social Worker1083743868
  40. Chelsea Director, DMDDentist1942936877
  41. William Discepolo, M.D.Clinical Cardiac Electrophysiology Physician1932308137
  42. Theodora DitommasoBehavior Technician1134951809
  43. Sheila DittlerSocial Worker1992954085
  44. James DittonAddiction (Substance Use Disorder) Counselor1124860812
  45. Lauryn Divers, LMFTMarriage & Family Therapist1649302696
  46. Anita DixonBehavior Technician1154085843
  47. Esmeralda DixonBehavior Technician1053205575
  48. Tameshia DixonBehavior Technician1154055705
  49. Christian Dizon, PT, D.P.T.Physical Therapist1811378490
  50. Courtny DizonBehavior Technician1194613067

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

Pasadena, California appears in the CMS National Plan and Provider Enumeration System with 10,525 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 Pasadena - 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 Pasadena 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 Pasadena is weighted toward Behavior Technician (1,617 clinicians, followed by Marriage & Family Therapist with 1,082 and Rehabilitation Practitioner with 924). 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, Pasadena reports roughly 27 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 Pasadena 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 Pasadena, CA?

There are 10,525 registered healthcare providers in Pasadena, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Pasadena?

The most common specialties in Pasadena are Behavior Technician, Marriage & Family Therapist, Rehabilitation Practitioner, Student in an Organized Health Care Education/Training Program, Clinical Social Worker. Behavior Technician has the most providers with 1,617.

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.