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 62 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. Ronald Shiraishi, DMDGeneral Practice Dentistry1922320639
  2. Ryan Shook, D.O.Emergency Medical Services (Emergency Medicine) Physician1437358462
  3. Jameelah Shortridge-SinghCommunity Health Worker1881430254
  4. Jennifer ShowalterSpeech-Language Assistant1457987687
  5. Loretta ShowalterClinical Social Worker1518388248
  6. Jeffrey Shulze, PH.D.Rehabilitation Psychologist1124707666
  7. Paul Shuman, PSY.D.Clinical Psychologist1013005677
  8. Roanna Siangio, DMDDentist1134217052
  9. Karen Sierra, DDSDentist1619449915
  10. Ambar SiguenseBehavior Technician1376215640
  11. Irina Silchuk, OTR/LOccupational Therapist1518210467
  12. Alfredo Silva, LVNLicensed Vocational Nurse1629841770
  13. Herminia SilvaSpeech-Language Assistant1043034952
  14. Melody SilvaStudent in an Organized Health Care Education/Training Program1316432776
  15. Paloma SilvaDay Training/Habilitation Specialist1932075694
  16. Fernanda Silva VargasMassage Therapist1619803814
  17. Lee Silver, M.D.Orthopaedic Surgery Physician1780841999
  18. Mark Silver, M.D.Orthopaedic Surgery Physician1639245129
  19. William Sim, MDInternal Medicine Physician1437256906
  20. Alexander SimpsonBehavior Technician1578314696
  21. Rebecca SimsForensic Psychologist1861157570
  22. Amy Sinclair, P.T.Physical Therapist1851548986
  23. Jose Sing, MDEmergency Medicine Physician1538110432
  24. Anantjit Singh, MD MPH FACCClinical Cardiac Electrophysiology Physician1245335405
  25. Kanwar SinghFamily Nurse Practitioner1831079920
  26. Shaun Singh, DOInternal Medicine Physician1871054684
  27. Vivian Sinkaset, PHARM.D.Ambulatory Care Pharmacist1588752497
  28. Jenny SiribanRecreation Therapist1639692932
  29. Mary Sisk, PTPhysical Therapist1205958873
  30. Christian Sison, NPAdult Health Nurse Practitioner1912481300
  31. Kasey Siu, DOInternal Medicine Physician1447811559
  32. Souad SkafiSpeech-Language Assistant1417822461
  33. Laura Skeeters, MPTPhysical Therapist1609092287
  34. Ariana SliferDoula1043021975
  35. Angel SmithBehavior Technician1598547234
  36. Elaska SmithCase Manager/Care Coordinator1851564785
  37. Garrett Smith, PTAPhysical Therapy Assistant1871333930
  38. Jason SmithBehavior Technician1316543127
  39. Karla SmithDay Training/Habilitation Specialist1215872015
  40. Kiara SmithMarriage & Family Therapist1669248472
  41. Malinda Smith, LVNLicensed Vocational Nurse1922687367
  42. Renee Smith, M.D.Psychiatry Physician1710030812
  43. Samantha Smith, RDNRegistered Dietitian1992338933
  44. Virlaysia SmithBehavior Technician1164203956
  45. Stephen Snider, PHARM. DPharmacist1922198308
  46. Thor SnyderStudent in an Organized Health Care Education/Training Program1265154660
  47. John Terence So, MDInternal Medicine Physician1801924295
  48. Christopher Sobowale, M.D.Internal Medicine Physician1821445370
  49. Kyaw Khaing Soe, M.D.Internal Medicine Physician1659804946
  50. Julia SolanoCase Manager/Care Coordinator1508222027

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.