NPPES file of Aug 9, 2026

Doctors and health care providers in Downey, CA

3,607 individual NPPES records list a practice address in Downey, 60th of 812 California cities. The largest group is behavior technician: 763, 21% of the city's records, against 18% across California. Page 27 of 73.

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

Downey in California

  • Rank in California60th of 812 cities by records
  • Share of the state0.4% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups32.4% of all records

Compared with California as a whole, Downey has 9.5× the state's share of ambulatory care registered nurse records and 0.38× its share of marriage & family therapist records.

Providers in Downey, alphabetically

  1. Irving GreagorCertified Respiratory Therapist1952836066
  2. Alana GreenBehavior Technician1487253613
  3. Chennel GreenBehavior Technician1629645585
  4. Dana Green, CPOProsthetist1295506558
  5. Lorellen Green, MDInternal Medicine Physician1083839328
  6. Nicole Green, PHDMicrobiology Specialist/Technologist1295423374
  7. Tiffani GreenfieldSpeech-Language Assistant1427661461
  8. Annette GregsonPulmonary Rehabilitation Registered Respiratory Therapist1306300843
  9. Tyler GriffinFamily Nurse Practitioner1033062880
  10. Kim Griffin Esperon, LCSWClinical Social Worker1255450243
  11. Nayib GrijalvaBehavior Technician1881354421
  12. Peter Grimes, MDEmergency Medicine Physician1518181866
  13. Rashaad GrismoreCase Manager/Care Coordinator1093177826
  14. Heidi Groessl, PACPhysician Assistant1417086026
  15. Jennifer Grossman, LCSWClinical Social Worker1487935490
  16. Joseph GrubicEmergency Medicine Physician1033405030
  17. Cathrine Guanzon, RCPNeonatal/Pediatric Registered Respiratory Therapist1881175511
  18. Mary GuceBehavior Technician1447896758
  19. Adriana GudinoBehavior Technician1619739398
  20. Alfonso GudinoAddiction (Substance Use Disorder) Counselor1225659741
  21. Irma GuerreroBehavior Technician1073083234
  22. Rosamaria GuerreroBehavior Technician1881164044
  23. Richard Guess, MDEmergency Medicine Physician1083641708
  24. Ariana Guevara LarumbeBehavior Analyst1932741287
  25. Ellenita GuicoPsychiatric/Mental Health Nurse Practitioner1407514177
  26. Silvia GuillermoLicensed Vocational Nurse1184176760
  27. Cassandra Guinto, COTA/LOccupational Therapy Assistant1215437595
  28. Nicole Guirguis, DDSDentist1083135933
  29. Amber GuirolaOccupational Therapy Assistant1518329945
  30. Amy Guirola, BABehavior Technician1356922843
  31. Beatriz GuizarCase Manager/Care Coordinator1548604077
  32. Basuki Gunawan, M.D.Internal Medicine Physician1346352473
  33. Narayana Gunda, M.D.Internal Medicine Physician1720026271
  34. Kanav GuptaHospitalist Physician1457813941
  35. Ayessa GutierrezBehavior Technician1740842483
  36. Christian GutierrezBehavior Technician1477148708
  37. Irene GutierrezClinical Social Worker1386599439
  38. Marialejandra GutierrezMarriage & Family Therapist1528804044
  39. Nicholas GutierrezBehavior Technician1144999079
  40. Elizabeth GuzmanBehavior Analyst1285558502
  41. Emily GuzmanBehavior Technician1073199758
  42. Jessica GuzmanClinical Social Worker1538021936
  43. Karen GuzmanBehavior Technician1669069944
  44. Karen GuzmanBehavior Technician1871263897
  45. Marcelino GuzmanAddiction (Substance Use Disorder) Counselor1538528583
  46. Sandy GuzmanBehavior Technician1790383727
  47. Denise HaPhysical Rehabilitation Occupational Therapist1932622933
  48. Nancy Ha, RPHPharmacist1922633049
  49. Thanh Ha, DOAdult Medicine Physician1689098162
  50. Zoe Ha, D.O.Anesthesiology Physician1598154486

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

Downey, California appears in the CMS National Plan and Provider Enumeration System with 3,607 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 Downey - 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 Downey 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 Downey is weighted toward Behavior Technician (763 clinicians, followed by Pharmacist with 248 and Physical Therapist with 159). 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, Downey reports roughly 9.3 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, Mental Health Counselor is the most prominent one with no provider currently listing a Downey practice address, a coverage gap Downey patients typically fill by traveling to a larger nearby hub.

For Downey 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 Downey, CA?

There are 3,607 registered healthcare providers in Downey, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Downey?

The most common specialties in Downey are Behavior Technician, Pharmacist, Physical Therapist, Addiction (Substance Use Disorder) Counselor, Clinical Social Worker. Behavior Technician has the most providers with 763.

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.