NPPES file of Aug 9, 2026

Doctors and health care providers in Aliso Viejo, CA

568 individual NPPES records list a practice address in Aliso Viejo, 269th of 812 California cities. The largest group is marriage & family therapist: 37, 7% of the city's records, against 6% across California. Page 5 of 12.

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

The 8 largest groups in Aliso Viejo

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

Aliso Viejo in California

  • Rank in California269th of 812 cities by records
  • Share of the state<0.1% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups18% of all records

Compared with California as a whole, Aliso Viejo has 3.4× the state's share of massage therapist records and 0.19× its share of behavior technician records.

Providers in Aliso Viejo, alphabetically

  1. Maria Gutierrez Enciso, B.A.Mental Health Counselor1043453327
  2. Brett Hadley, D.O.Emergency Medicine Physician1932499829
  3. Richard Hahn, DDSDentist1568688372
  4. Suzanne Hamasaki, LMFT 50982Marriage & Family Therapist1104095918
  5. Allen HanAcupuncturist1326493396
  6. Jacqueline Hanks, DDS, MSDOrthodontics and Dentofacial Orthopedics Dentistry1497948897
  7. Caroline Hanna, MFTMarriage & Family Therapist1427650506
  8. Ream HannaOccupational Therapy Assistant1598270977
  9. Guitta Harb, DMDDentist1053633800
  10. Lauren HarnessOccupational Therapy Assistant1528464443
  11. Sarah Harpst, NPFamily Nurse Practitioner1558845263
  12. Trenton HarrisonPhysician Assistant1710513965
  13. Daniel Haspert, M.D.Specialist1427023316
  14. Azeen HassanzadehPharmacist1164038436
  15. Morris Hasson, MDInternal Medicine Physician1760562821
  16. Brian Hauser, M.D.Family Medicine Physician1982674438
  17. Kimberly Hauser, O.D.Optometrist1699873109
  18. Jane Helmeczi, PTOrthopedic Physical Therapist1225362510
  19. Carolyn Henry, COTAOccupational Therapy Assistant1841408838
  20. Samuel Herman, M.D.Internal Medicine Physician1780063644
  21. Julia Hermes, MDChild & Adolescent Psychiatry Physician1841378239
  22. Sharleen Herrera, OTRPhysical Rehabilitation Occupational Therapist1083744296
  23. Robert HerrickPhysical Therapist1497921282
  24. Anselm Hii, M.D.Hematology (Pathology) Physician1124057393
  25. Shannon Hill, PT MPTPhysical Therapist1194768036
  26. Vu Ho, RPHPharmacist1255153433
  27. Kenneth Hoang, D.C.Chiropractor1811283484
  28. Sharon Hoier, NPAcute Care Nurse Practitioner1437537388
  29. Kristen HonePhysical Therapist1790154748
  30. Yijing HuangMarriage & Family Therapist1770351884
  31. Margaret Huffman, D.D.S.Dentist1164655106
  32. Brooke Huffstetler, LMFTMarriage & Family Therapist1457891905
  33. Mark Hughes, DPTPhysical Therapist1013226695
  34. Sarah Hultquist, LMFTMental Health Counselor1184232092
  35. Jennifer Hummel, M.D.Molecular Genetic Pathology (Pathology) Physician1942496609
  36. Karen Hummel, PHDClinical Psychologist1326856089
  37. Brian HuynhPhysician Assistant1215745138
  38. Melissa HwangFamily Nurse Practitioner1942821038
  39. Janine IjsselsteinCase Manager/Care Coordinator1275389835
  40. Joy IkenagaSpeech-Language Pathologist1750858155
  41. Kenneth Illson, DCChiropractor1659554525
  42. Takeshi Ito, D.C.Chiropractor1245244946
  43. Steven Itrich, P.T.Physical Therapist1881707792
  44. Nicko Jaeger, FNP-BCFamily Nurse Practitioner1669960076
  45. Erica JalandoniBehavior Technician1457048431
  46. Jan Johnson, BJ6359271Pediatric Adolescent Medicine Physician1326193632
  47. Jesse Johnson, DDSDentist1306003355
  48. Matt Johnson, D.D.S.General Practice Dentistry1942580014
  49. Jeffrey Jones, DDSGeneral Practice Dentistry1609977438
  50. Amir JourabchiFamily Medicine Physician1184159337

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

Aliso Viejo, California appears in the CMS National Plan and Provider Enumeration System with 568 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 Aliso Viejo - 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 Aliso Viejo 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 Aliso Viejo is weighted toward Marriage & Family Therapist (37 clinicians, followed by Physical Therapist with 35 and Pharmacist with 30). 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, Aliso Viejo reports roughly 1.5 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, Student in an Organized Health Care Education/Training Program is the most prominent one with no provider currently listing a Aliso Viejo practice address, a coverage gap Aliso Viejo patients typically fill by traveling to a larger nearby hub.

For Aliso Viejo 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 Aliso Viejo, CA?

There are 568 registered healthcare providers in Aliso Viejo, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Aliso Viejo?

The most common specialties in Aliso Viejo are Marriage & Family Therapist, Physical Therapist, Pharmacist, General Practice Dentistry, Dentist. Marriage & Family Therapist has the most providers with 37.

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.