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 139 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. Timothy OhInternal Medicine Physician1225395502
  2. Masis Ohan, MDStudent in an Organized Health Care Education/Training Program1598550923
  3. Arbi Ohanian, M.D.Neurology Physician1982894606
  4. Beainy Ohanian, FNP-CFamily Nurse Practitioner1629857255
  5. Brenda OhtaClinical Social Worker1447186812
  6. Daniela OjedaMarriage & Family Therapist1194167783
  7. Gerilynn Okamoto, DDSDentist1255317954
  8. Robbin Okamoto, DDSDentist1871578013
  9. Odinaka OkegbeStudent in an Organized Health Care Education/Training Program1558257527
  10. Michael OkeneStudent in an Organized Health Care Education/Training Program1326662339
  11. Chibuike OkigboBehavior Technician1568267334
  12. Deana Okohira, PHARM. D.Pharmacist1841372430
  13. Maritone Olaer, DDSGeneral Practice Dentistry1922214501
  14. Emiliano OlagueBehavior Analyst1902754625
  15. Ronald Olah, MDInternal Medicine Physician1881668341
  16. N Olambiwonnu, M.D.Pediatric Adolescent Medicine Physician1568551752
  17. Daisy OlayaBehavior Technician1730806860
  18. Chantal Olenczuk, OTR/LOccupational Therapist1508425885
  19. Pamela OlenderMarriage & Family Therapist1881493377
  20. Yolanda OleniaczMarriage & Family Therapist1205014685
  21. Jonathan OlevsonStudent in an Organized Health Care Education/Training Program1578232682
  22. Jonathan Oliden Cortez, BSCase Manager/Care Coordinator1740833912
  23. Atalie OlivaRehabilitation Practitioner1841835287
  24. Christopher Oliva, SUDRCAddiction (Substance Use Disorder) Counselor1346939600
  25. Mia OlivaCommunity Health Worker1437930856
  26. Nancy OlivaBehavior Technician1427636687
  27. Melanie OlivaresBehavior Technician1902692916
  28. Ana OlivarezBehavior Technician1922614734
  29. Steven OlivarezBehavior Technician1881967206
  30. Brycken OliveStudent in an Organized Health Care Education/Training Program1457147043
  31. Jacob OliverMarriage & Family Therapist1205465036
  32. Nathan OliverClinical Social Worker1891944385
  33. Jimmy OlmedoAddiction (Substance Use Disorder) Counselor1073463295
  34. Robert Olmos, MFTMarriage & Family Therapist1952684581
  35. Leesa OlsonAssistant Behavior Analyst1871331330
  36. Johanna Olson-Kennedy, MDPediatric Adolescent Medicine Physician1396831665
  37. Brandice OluochRehabilitation Practitioner1508395526
  38. Yainyt Olvera Guerrero, DCChiropractor1962225508
  39. Mia Olvera-RojasRehabilitation Practitioner1548815434
  40. Linda Om, PHARMDPharmacist1013266824
  41. Katherine Omalley, AMFTMarriage & Family Therapist1215627203
  42. Hamid Ommatyar, OPTICIANOptician1659585818
  43. Katheryn Omolon, RNRegistered Nurse1952093288
  44. Shoichi OmotoStudent in an Organized Health Care Education/Training Program1497642441
  45. Austin OmwangheAdministrator Registered Nurse1760427330
  46. Nane OnanyanStudent in an Organized Health Care Education/Training Program1366378143
  47. Amy Onderdonk, CCC-SLPSpeech-Language Pathologist1821304908
  48. Jacob OneillAddiction (Substance Use Disorder) Counselor1790633709
  49. Semra OnerStudent in an Organized Health Care Education/Training Program1912517301
  50. Joan Ong, RDHAPDental Hygienist1639959125

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.