NPPES file of Aug 9, 2026

Doctors and health care providers in Norwalk, CA

1,600 individual NPPES records list a practice address in Norwalk, 137th of 812 California cities. The largest group is behavior technician: 193, 12% of the city's records, against 18% across California. Page 28 of 32.

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

Norwalk in California

  • Rank in California137th of 812 cities by records
  • Share of the state0.2% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups24% of all records

Compared with California as a whole, Norwalk has 8.1× the state's share of licensed psychiatric technician records and 0.50× its share of addiction (substance use disorder) counselor records.

Providers in Norwalk, alphabetically

  1. Frank SeitzSpecialist1588728505
  2. Clarissa Semeniuk, FNP-BCFamily Nurse Practitioner1598169187
  3. Sahara SempleStudent in an Organized Health Care Education/Training Program1932973401
  4. Grant Seo, PSY.D.Clinical Psychologist1740597780
  5. Torang Sepah, M.D.Psychiatry Physician1598901167
  6. Michelle Sepulveda, MAStudent in an Organized Health Care Education/Training Program1619530151
  7. Elizabeth Sequeira, MED, BCBABehavior Analyst1841602950
  8. John SerranoOccupational Therapy Assistant1326609132
  9. Lucy Serrano, FNP-CFamily Nurse Practitioner1750057204
  10. Melvina Session, M.S., BCBABehavior Analyst1588178826
  11. Alexandra Seymour, MS, LMFTMarriage & Family Therapist1124764162
  12. Anthony SeynosRehabilitation Practitioner1891327391
  13. Bhaviesh Shah, MDFamily Medicine Physician1215946504
  14. Rachitaben ShahPhysical Therapy Assistant1831070028
  15. Varun ShahiEmergency Medicine Physician1487017497
  16. Kaushal Sharma, MDPsychiatry Physician1295782266
  17. Willy Shea, DDSDentist1275813115
  18. Nicholas ShepardStudent in an Organized Health Care Education/Training Program1396099321
  19. Evan Sherin-JonesStudent in an Organized Health Care Education/Training Program1871211417
  20. Yong Shin, ACUPUNCTURISTAcupuncturist1942442561
  21. Nerissa Sibal, MDPsychiatry Physician1508834888
  22. Kayda SiengBehavior Technician1043187131
  23. Amberlyn Sierra, LCSWClinical Social Worker1184180143
  24. Greg SierraSpecialist1841442084
  25. Elizama SigalaCase Manager/Care Coordinator1588138689
  26. Ronda SilasSpecialist1386786085
  27. Anna Silva, MSW, LCSW, BCBAClinical Social Worker1568539849
  28. Susie SimSpecialist1538310156
  29. Amarpreet Singh, D.D.S.General Practice Dentistry1952518441
  30. Kimberly SiribanStudent in an Organized Health Care Education/Training Program1134861313
  31. Philip Skoretz, M.D.Psychiatry Physician1972777332
  32. Courtney SmithProfessional Counselor1972075448
  33. Katherine Smith, MDPediatrics Physician1467409441
  34. Kimberly Smith, PSYDClinical Neuropsychologist1366843161
  35. Lowell Smith, O.D.Optometrist1962545822
  36. Rita Smith, LVNLicensed Vocational Nurse1497044473
  37. Tylour SmithLicensed Vocational Nurse1316725724
  38. Connie Smith-WilliamsMental Health Counselor1437289634
  39. Fe Solmayor, M.DInternal Medicine Physician1922016377
  40. Brianna SongPhysician Assistant1598570954
  41. Veronica SoniLicensed Psychiatric Technician1871110379
  42. George Soohoo, DDSDentist1770722159
  43. Sandi SotoLicensed Psychiatric Technician1255604823
  44. Audrey SpencerBehavior Technician1588521207
  45. Katelyn Spohn, MS, CF-SLPSpeech-Language Pathologist1083535645
  46. Nathapet Srinivasan, M.D.Cardiovascular Disease Physician1316029853
  47. Jordan StampsClinical Social Worker1861984650
  48. Jacob Stein, PSY.D.Clinical Psychologist1508218355
  49. Jordana SteinbergCase Manager/Care Coordinator1386141547
  50. Lorenza StewartLicensed Psychiatric Technician1609231554

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

Norwalk, California appears in the CMS National Plan and Provider Enumeration System with 1,600 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 Norwalk - 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 Norwalk 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 Norwalk is weighted toward Behavior Technician (193 clinicians, followed by Case Manager/Care Coordinator with 105 and Student in an Organized Health Care Education/Training Program with 86). 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, Norwalk reports roughly 4.1 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, Behavior Analyst is the most prominent one with no provider currently listing a Norwalk practice address, a coverage gap Norwalk patients typically fill by traveling to a larger nearby hub.

For Norwalk 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 Norwalk, CA?

There are 1,600 registered healthcare providers in Norwalk, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Norwalk?

The most common specialties in Norwalk are Behavior Technician, Case Manager/Care Coordinator, Student in an Organized Health Care Education/Training Program, Clinical Social Worker, Marriage & Family Therapist. Behavior Technician has the most providers with 193.

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.