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 61 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. Martin Sechrist, D.O.Family Medicine Physician1336206663
  2. Douglas Segal, MDCardiovascular Disease Physician1881660991
  3. Marc Segall, M.D.Ophthalmology Physician1326151531
  4. Rebeca SegovianoCommunity Health Worker1972350874
  5. Andrew SeguinBehavior Analyst1255113775
  6. Medhat Seif, M.DObstetrics & Gynecology Physician1245330828
  7. Linda Sells, CRNACertified Registered Nurse Anesthetist1740306984
  8. Ruben SenaAddiction (Substance Use Disorder) Counselor1104645431
  9. William SenaSpeech-Language Pathologist1134641624
  10. Solina SengBehavior Analyst1972150985
  11. Sarah Seo, MS, CCC-SLPSpeech-Language Pathologist1720599103
  12. Lynsey SerranoBehavior Technician1679157739
  13. Nicholas SerranoBehavior Technician1174185078
  14. Celia Serro, MPTPhysical Therapist1528274073
  15. Pauline ServinBehavior Technician1831959246
  16. Sahira SevillaAddiction (Substance Use Disorder) Counselor1205544319
  17. Mary Seward, M.A., CCC-SLPSpeech-Language Pathologist1821534322
  18. Shiva Shabnam, M.D.Internal Medicine Physician1679802037
  19. Anita Shadduck, LCSWClinical Social Worker1982974663
  20. Neda Shafai, DDSDentist1255863346
  21. Jalpa Shah, PTPhysical Therapist1023233491
  22. Jennifer Shah, PT, DPT, NCSPhysical Therapist1831650951
  23. Kush Shah, DOStudent in an Organized Health Care Education/Training Program1518617463
  24. Madhvi ShahFamily Medicine Physician1730543265
  25. Matin ShahEmergency Medicine Physician1245643253
  26. Niranjan Shah, DDSGeneral Practice Dentistry1922060730
  27. John Shaib, MDNephrology Physician1851339048
  28. Ferdinand Shamiyeh, M.D.Pediatrics Physician1104183961
  29. Kourosh Shamlou, M.D.Orthopaedic Surgery Physician1073621470
  30. Hazim Shams, M.D.Obstetrics & Gynecology Physician1336357110
  31. Maryam Shams, NPWomen's Health Nurse Practitioner1093160764
  32. Mandana Shamsa, MDInternal Medicine Physician1770628638
  33. Kathleen ShanfieldOccupational Therapist1922532993
  34. Natalie Shanfield, MA, CCC-SLPSpeech-Language Pathologist1407196074
  35. Reza Sharafi, M.D.Internal Medicine Physician1336199660
  36. Chetan Sharma, PHARM. D.Pharmacist1477972669
  37. Delbert SharonCommunity Health Worker1285460881
  38. Marianne Sharon, M.A.Professional Counselor1497174502
  39. Kayleigh SharpMarriage & Family Therapist1144038944
  40. Laila Sheikh, DPTPhysical Therapist1649940842
  41. Laurel Shern, DMDDentist1568222461
  42. Georgette Sherwood, RDHDental Hygienist1508163353
  43. Vijay ShethBehavior Technician1104488519
  44. Duke ShibataCase Manager/Care Coordinator1306146519
  45. Connie Shieh, RDRegistered Dietitian1407041353
  46. Daniel Shin, MDPhysical Medicine & Rehabilitation Physician1295713816
  47. Ji Shin, PA-CPhysician Assistant1245960772
  48. Maria Shin, PHARM DPharmacist1669003596
  49. Shaun ShineHealth & Wellness Coach1699640367
  50. Chrislynn Shiokari, PHARM.D.Pharmacist1235570318

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.