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 140 of 211.

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).

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. Sofia OngStudent in an Organized Health Care Education/Training Program1699539288
  2. Sunyata Ono, LCSWClinical Social Worker1720535784
  3. Lindsay OnstadStudent in an Organized Health Care Education/Training Program1053240739
  4. Angelina OnsurezDay Training/Habilitation Specialist1215629563
  5. Lacey Ontiveros, R.B.TBehavior Technician1609492198
  6. Threza OnyemelukweBehavior Analyst1699491993
  7. Khin Oo, MDInternal Medicine Physician1588638043
  8. Michael OqueliRehabilitation Practitioner1720728181
  9. Georgina OquitaMarriage & Family Therapist1174650485
  10. Melina OrantesBehavior Technician1114704129
  11. Molly Orchard, LCSWClinical Social Worker1073087979
  12. Joseph Charles Ordona, D.C.Chiropractor1003189895
  13. Gisell OrdunaRehabilitation Practitioner1588208367
  14. Carolann OrellanaBehavior Technician1285398297
  15. Danelle OrellanaLicensed Vocational Nurse1508254657
  16. Zenia OrellanaRehabilitation Practitioner1134502156
  17. Jacqueline OrnelasCommunity Health Worker1639806045
  18. Andrew OroniaAddiction (Substance Use Disorder) Counselor1720938723
  19. Aimee Oropeza, OTR/LOccupational Therapist1619853280
  20. Adriana OrozcoDay Training/Habilitation Specialist1588894513
  21. Andrea OrozcoRehabilitation Practitioner1821399676
  22. Arlene OrozcoRehabilitation Practitioner1962703728
  23. Brenda OrozcoCase Manager/Care Coordinator1538464391
  24. Cassandra OrozcoClinical Social Worker1902140445
  25. Celia OrozcoMarriage & Family Therapist1700175007
  26. Desiree OrozcoBehavior Analyst1386239713
  27. Griselda OrozcoRehabilitation Practitioner1427245398
  28. Janet Orozco, LCSWMarriage & Family Therapist1689978793
  29. Mejia OrozcoBehavior Technician1316675739
  30. Pamela OrozcoRehabilitation Practitioner1427782390
  31. Stephanie OrozcoBehavior Technician1760291785
  32. Teresa OrozcoCase Manager/Care Coordinator1427530013
  33. Rosaura Orozco-AlarconCase Manager/Care Coordinator1558531582
  34. Janet Orozco-BrownRehabilitation Practitioner1649579103
  35. Tiela OrrBehavior Technician1942966692
  36. Natalia OrsoStudent in an Organized Health Care Education/Training Program1982599908
  37. Alexander OrtegaBehavior Technician1306559018
  38. Damaris OrtegaDoula1427857960
  39. Darlene OrtegaBehavior Technician1558210484
  40. Edelia OrtegaBehavior Technician1306410162
  41. Elaine OrtegaStudent in an Organized Health Care Education/Training Program1598500647
  42. Karla OrtegaRehabilitation Practitioner1437642485
  43. Krista OrtegaBehavior Technician1801446513
  44. Magdalena OrtegaCase Manager/Care Coordinator1942764022
  45. Rafael OrtegaRehabilitation Practitioner1639730070
  46. Rosa OrtegaRehabilitation Practitioner1437613296
  47. Stephanie OrtegaMental Health Counselor1225207632
  48. Cesar Ortega VegaBehavior Technician1578181897
  49. Lisa Ortega-MayaRehabilitation Practitioner1871816603
  50. Lideth Ortega-Villalobos, PH.D.Psychologist1649644980

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.