Registry data as of Aug 27, 2026

Doctors and health care providers in Ione, CA

94 individual NPPES records list a Ione practice address, 500th of 812 California cities. The largest group is clinical social worker: 14, 15% of the city's records, against 3% across California.

CMS NPPES registry, loaded Aug 27, 2026 · method · Verify with CMS →

The 8 largest groups in Ione

Source: CMS NPPES primary taxonomy, loaded Aug 27, 2026.

Ione in California

  • Rank in California500th of 812 cities by records
  • Share of the state<0.1% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups38.3% of all records
  • Clinical Social Worker rank11th of the 10 California cities with the most

Compared with California as a whole, Ione has 12× the state's share of clinical psychologist records.

Providers in Ione, alphabetically

  1. Troy AdkinsPhysician Assistant1699697581
  2. Omoniyi Akintola, PA CMedical Physician Assistant1548443328
  3. Trinity AlvarezClinical Social Worker1457053944
  4. Geneva Amas, LCSWClinical Social Worker1902045222
  5. Carol Anderson, PSY.D.Clinical Psychologist1366783672
  6. Allison Andres, PSY.D.Psychologist1447402920
  7. Bradley Archibald, DDSDentist1083897029
  8. Robert Arnold, PH.D.Clinical Psychologist1437495256
  9. Wayne Batalo, PHARMDPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1215296918
  10. Felicia Berry-Mitchell, PHDPsychologist1154420214
  11. Anthony Bowers, LCSWClinical Social Worker1427799451
  12. Vickie CaldwellClinical Social Worker1497049050
  13. Emily CampbellDoula1861032286
  14. Christian Carter, PACPhysician Assistant1518133693
  15. Ashlan Chavez, PH.D.Clinical Psychologist1962187252
  16. Leacha Clark, ASWClinical Social Worker1366187676
  17. O. M. Custer, ED.D.Clinical Psychologist1134598295
  18. Melissa Derrick, RN, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1427407832
  19. Pamela Dewitt, PPSSchool Counselor1063201903
  20. Carlos Dreiss, PH.D.Psychologist1184773962
  21. Thomas Eaton, DDSGeneral Practice Dentistry1013020106
  22. Frederick Fowler, MDForensic Psychiatry Physician1902047533
  23. Richard Galloway, MDGeneral Practice Physician1114109568
  24. Felicity Gazowsky, PSYDAddiction (Substance Use Disorder) Counselor1255478483
  25. Julia GilbertBehavior Analyst1891075677
  26. Michael Giovannoni, PHARM DPharmacist1679832331
  27. Carolyn GrahamStudent in an Organized Health Care Education/Training Program1235929159
  28. Cheryl Hanson, LMFT 138777Marriage & Family Therapist1982308862
  29. Sam Harary, PSYCHOLOGISTStudent in an Organized Health Care Education/Training Program1194058248
  30. Hillary Hart, RNNutrition Support Registered Nurse1326278391
  31. Wesley Hashimoto, M.D.Internal Medicine Physician1902080112
  32. Lucy Her, PSY.D.Clinical Psychologist1508041591
  33. Millie Herrera, PSY.DForensic Psychologist1316423692
  34. Evalyn Horowitz, M.D.Internal Medicine Physician1295930188
  35. Marilyn Immoos, PH.D.Clinical Psychologist1417111709
  36. Biju John, MDPsychiatry Physician1073691705
  37. Stephanie Johnson, PSY.D.Clinical Psychologist1588944813
  38. Walter Johnson, M.D.General Practice Physician1780919282
  39. Kathleen Keller, PSY.D.Clinical Psychologist1669883336
  40. Dawn Kettell-NessPsychiatric/Mental Health Registered Nurse1861932378
  41. Patricia Khoo, M.D.Psychiatry Physician1760555452
  42. John Klopping, PHARMDPharmacist1740904234
  43. Robert Landry, PH.D.Psychologist1992130108
  44. Elizabeth Larsson, LCSWClinical Social Worker1679052955
  45. Debra Laughlin, L.C.S.W.Clinical Social Worker1316287089
  46. Ava Le, PSYDClinical Psychologist1134720725
  47. Hillel LefkowitzClinical Psychologist1558009761
  48. Marisa Linehan, PSY.D.Clinical Psychologist1821744277
  49. Ellen Ling, DDSDentist1386828218
  50. Madaline Lomibao, PSY.DStudent in an Organized Health Care Education/Training Program1316472046

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

Ione, California appears in the CMS National Plan and Provider Enumeration System with 94 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 Ione - 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 Ione 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 Ione is weighted toward Clinical Social Worker (14 clinicians, followed by Clinical Psychologist with 13 and Student in an Organized Health Care Education/Training Program with 9). 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, Ione reports roughly 0.2 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 Technician is the most prominent one with no provider currently listing a Ione practice address, a coverage gap Ione patients typically fill by traveling to a larger nearby hub.

For Ione 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 Ione, CA?

There are 94 registered healthcare providers in Ione, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Ione?

The most common specialties in Ione are Clinical Social Worker, Clinical Psychologist, Student in an Organized Health Care Education/Training Program, Dentist, Psychologist. Clinical Social Worker has the most providers with 14.

Source: CMS National Plan and Provider Enumeration System (NPPES), file loaded Aug 27, 2026 (NPPES files on CMS.gov). Records are self-reported registrations, not licenses.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.