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 11 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. Danalin Castro, DDSGeneral Practice Dentistry1811811102
  2. Ernest Castro, DPO IICase Manager/Care Coordinator1093959942
  3. Irwin CastroMarriage & Family Therapist1740708908
  4. Jessica CastroStudent in an Organized Health Care Education/Training Program1679422596
  5. Susan CastroBehavior Technician1215406129
  6. Gladis Castro-HernandezBehavior Technician1548024383
  7. Sophia Cavalcanti De Albuquerque Serpa, PSY.D.Rehabilitation Psychologist1790348712
  8. Briana CebrerosBehavior Technician1992590699
  9. Karla CedenoBehavior Technician1790449841
  10. Naiden CejaBehavior Technician1841954237
  11. Lindy Cejka, DPTOrthopedic Physical Therapist1518395797
  12. Adriene Cepeda, RRTGeneral Care Registered Respiratory Therapist1295203461
  13. Cesar CepedaAddiction (Substance Use Disorder) Counselor1558597518
  14. Tracy Cerda Armenta, LCSW, PPSC, CWASchool Social Worker1316823701
  15. Briana CerezoCommunity Health Worker1346088911
  16. Sylvia CernaRegistered Respiratory Therapist1821854761
  17. Kathleen CeronBehavior Technician1982173803
  18. Fernando CervantesBehavior Technician1881276194
  19. Michael CervantesOccupational Therapy Assistant1699617811
  20. Nicole Cervantes, M.D.Internal Medicine Physician1174985816
  21. Stacelyn Cervantes, LMFTMarriage & Family Therapist1669029559
  22. Tabitha CervantesBehavior Technician1336739978
  23. Vanessa Cervantes, MA, CCC-SLPSpeech-Language Pathologist1639692940
  24. Martha Cervantes-AlvarezSocial Worker1689798738
  25. Joon Cha, PHARM.D.Pharmacist1013456771
  26. Summer ChaconBehavior Technician1801763305
  27. Melani ChagoyaBehavior Technician1508794868
  28. Hassan Chahine, MDInternal Medicine Physician1518326933
  29. Ron Chai, M.D.Internal Medicine Physician1447361316
  30. Roberta Chaidez, RNAmbulatory Care Registered Nurse1104368299
  31. Chy Chaing, PHARM DPharmacist1174891444
  32. Christina Chaires, CLINICAL SOCIAL WORKClinical Social Worker1952964157
  33. Aaron ChakCommunity Health Worker1780246686
  34. Anarsuren ChalkhaasurenBehavior Technician1093284846
  35. Kristin Chalmers, PTPhysical Therapist1356568802
  36. Richard Chambers, M.D.Orthopaedic Surgery Physician1487762944
  37. Adam Chan, DPMFoot & Ankle Surgery Podiatrist1063152098
  38. Andrew ChanPharmacist1164053260
  39. Anthony Chan, DOFamily Medicine Physician1831849405
  40. Casey ChanPharmacist1205467990
  41. Jade ChanDay Training/Habilitation Specialist1356216642
  42. Katherine ChanSpeech-Language Pathologist1306368899
  43. Maria Victoria ChanAmbulatory Care Registered Nurse1871462663
  44. Michael ChanBehavior Technician1831751569
  45. Paul Chan, MDPhysical Medicine & Rehabilitation Physician1417481995
  46. Rebecca Chan, MDAnesthesiology Physician1982809307
  47. Andy ChangOccupational Therapist1528350964
  48. Ashley Chang, PT, DPTPhysical Therapist1013684422
  49. Daniel ChangBehavior Technician1417566381
  50. Elbert Chang, D.O.Obstetrics & Gynecology Physician1215460712

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.