NPPES file of Aug 9, 2026

Doctors and health care providers in Garden Grove, CA

4,572 individual NPPES records list a practice address in Garden Grove, 42nd of 812 California cities. The largest group is behavior technician: 2,130, 47% of the city's records, against 18% across California. Page 77 of 92.

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

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

The 8 largest groups in Garden Grove

  1. Behavior Technician2,130
  2. Pharmacist220
  3. Behavior Analyst203
  4. Mental Health Counselor123
  5. Marriage & Family Therapist104
  6. Clinical Social Worker89
  7. General Practice Dentistry86
  8. Physical Therapist84

Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.

Garden Grove in California

  • Rank in California42nd of 812 cities by records
  • Share of the state0.5% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups55.8% of all records

Compared with California as a whole, Garden Grove has 2.6× the state's share of behavior technician records and 0.19× its share of student in an organized health care education/training program records.

Providers in Garden Grove, alphabetically

  1. Howard Siegel, M.D.Pediatrics Physician1669589750
  2. Vanesa Sierra HerreraBehavior Technician1174234306
  3. Emily SihiteBehavior Technician1437926938
  4. John Silberstein, R.PH.Pharmacist1689869943
  5. Kelly SilerBehavior Technician1598563876
  6. Ashley SilvaBehavior Technician1023961885
  7. Maria SilvaCase Manager/Care Coordinator1225329832
  8. Evelyn Silva AlvarezBehavior Technician1639937030
  9. Jonanthan Silva De OliveiraBehavior Technician1508549775
  10. Iris Silva FlorencioBehavior Technician1790595973
  11. Sonia SilvasBehavior Technician1881533396
  12. Melanie Silver, ATCAthletic Trainer1831565894
  13. Alison SilversonBehavior Technician1104705144
  14. Joseph SimbeyeBehavior Technician1841024478
  15. Usamah Simjee, MDPsychiatry Physician1841750783
  16. Mary Simmons, OTROccupational Therapist1316145691
  17. Rachael SimmonsBehavior Analyst1215465190
  18. Trinity SimmonsBehavior Technician1093687667
  19. Virginia Simpkins, RBTBehavior Technician1225799364
  20. Karin Sinavsky, MDAnesthesiology Physician1831328590
  21. Gurbir Singh, RNRegistered Nurse1629608914
  22. Mankaranpreet Singh, DCChiropractor1356007702
  23. Ravinder Singh, MDPsychiatry Physician1972560605
  24. Ashley SinklerBehavior Technician1891637450
  25. Brittany SinklerBehavior Technician1659162915
  26. Shari SiroisPharmacist1952696171
  27. Natalie SitwellMental Health Counselor1972102523
  28. Amanda Siu, D.D.SPediatric Dentistry1154745594
  29. John Skenandore, DDSDentist1093377111
  30. Amy SkipperBehavior Technician1336894377
  31. Samira SlankardBehavior Technician1720789712
  32. Olivia SlatteryBehavior Technician1700548740
  33. Aaron SmithMental Health Counselor1649404054
  34. Aniyah SmithBehavior Technician1750189387
  35. Britney SmithBehavior Technician1073474631
  36. Dawn SmithBehavior Technician1477112753
  37. Emma SmithBehavior Technician1740106681
  38. Jacob SmithBehavior Technician1780479022
  39. Jessica Smith, CRATCardiology Technician1124642442
  40. Jessica SmithBehavior Technician1588406920
  41. John Smith, R1585691024Addiction (Substance Use Disorder) Counselor1952127466
  42. Kealani SmithAssistant Behavior Analyst1003797820
  43. Macy SmithBehavior Technician1689213068
  44. Nicole Smith, COTA/LOccupational Therapy Assistant1457878548
  45. Sara Smith, M.A.Mental Health Counselor1942687132
  46. Shaloma SmithBehavior Technician1235012311
  47. Sheilah SmithBehavior Analyst1821640228
  48. Maureen Smitson, D.C.Chiropractor1891828596
  49. Pauline Smitson, D.C.Chiropractor1255464962
  50. Danielle SmokerCounselor1841162963

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

Garden Grove, California appears in the CMS National Plan and Provider Enumeration System with 4,572 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 Garden Grove - 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 Garden Grove 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 Garden Grove is weighted toward Behavior Technician (2,130 clinicians, followed by Pharmacist with 220 and Behavior Analyst with 203). 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, Garden Grove reports roughly 11.7 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.

For Garden Grove 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 Garden Grove, CA?

There are 4,572 registered healthcare providers in Garden Grove, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Garden Grove?

The most common specialties in Garden Grove are Behavior Technician, Pharmacist, Behavior Analyst, Mental Health Counselor, Marriage & Family Therapist. Behavior Technician has the most providers with 2,130.

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.