NPPES file of Aug 9, 2026

Doctors and health care providers in Vista, CA

2,017 individual NPPES records list a practice address in Vista, 111th of 812 California cities. The largest group is behavior technician: 170, 8% of the city's records, against 18% across California. Page 28 of 41.

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

Vista in California

  • Rank in California111th of 812 cities by records
  • Share of the state0.2% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups21.6% of all records

Compared with California as a whole, Vista has 3.3× the state's share of professional counselor records and 0.28× its share of student in an organized health care education/training program records.

Providers in Vista, alphabetically

  1. Paulette O'Connor, DDSDentist1093182768
  2. Diane Oakes, M.A. MFTMental Health Counselor1003090044
  3. Alexandra OchoaBehavior Technician1487343455
  4. Lisset Ochoa, B.ACase Manager/Care Coordinator1821411844
  5. Stephanie OchoaMarriage & Family Therapist1861212706
  6. Melanie Oddou, WHNP, MSNWomen's Health Nurse Practitioner1750668893
  7. Krystal OdishoPharmacist1306665229
  8. Ashraf Okba, DDSDentist1659410199
  9. Mary Olds, RNPsychiatric/Mental Health Registered Nurse1154516144
  10. Carlos Oliva, M.D.General Practice Physician1891882239
  11. Christina OlivaDentist1104090497
  12. Richard Oliva, M.D.Psychiatry Physician1952599938
  13. Carlos OlivaresCounselor1669059440
  14. Gabriel OlivaresStudent in an Organized Health Care Education/Training Program1205766474
  15. Amanda Oliveira, RDNRegistered Dietitian1932687357
  16. Erika OliveraMental Health Counselor1154651057
  17. Nicole Ollivier, IMFBehavior Analyst1124197306
  18. Beth OlsenAddiction (Substance Use Disorder) Counselor1619624988
  19. Meghan OlsenRegistered Nurse1396443669
  20. Robert Olson, D.C.,Chiropractor1922045046
  21. Vanessa OlsonAddiction (Substance Use Disorder) Counselor1265080642
  22. Gerald Ondash, MDInternal Medicine Physician1730102153
  23. Amy Oneill, CLINICAL/MFTStudent in an Organized Health Care Education/Training Program1952129892
  24. Donald Ong, MDFamily Medicine Physician1972579910
  25. Patricia Oquist, M.F.T.Marriage & Family Therapist1699922062
  26. Mayrene OregonMental Health Counselor1376209577
  27. Mary OrrisonCounselor1760773642
  28. Monica Ortiz, MSW, ACSWClinical Social Worker1427916261
  29. Regin Clenn Ortiz, CLSMedical Laboratory Technician1215687819
  30. William OrtizAddiction (Substance Use Disorder) Counselor1871367631
  31. Bruce OsbornMarriage & Family Therapist1528301157
  32. Monique Osselaer, IMFMarriage & Family Therapist1558593111
  33. James OwensAddiction (Substance Use Disorder) Counselor1104395102
  34. Sherri OwensClinical Social Worker1538784392
  35. Willie Owens, RBTBehavior Technician1306354139
  36. Joel OxmanClinical Child & Adolescent Psychologist1316163652
  37. Elizabeth Pabisz, MPTPhysical Therapist1780651265
  38. Martha PaceAddiction (Substance Use Disorder) Counselor1306404116
  39. Jessica PachonBehavior Technician1043082670
  40. Krista PaddockMental Health Counselor1891014544
  41. Maritza PadillaBehavior Technician1134040033
  42. Shaliss Padilla, BS, MA, MFTMental Health Counselor1457685141
  43. Cristina Padron, LVNLicensed Vocational Nurse1720396963
  44. Delia Pallaziol, M.D.General Practice Physician1265557086
  45. Maria PalomoMarriage & Family Therapist1336286566
  46. Alexandra Palumbo, RDNRegistered Dietitian1871067348
  47. Rosa PamatzMental Health Counselor1184140295
  48. Chelsea Pancari, RDRegistered Dietitian1902355191
  49. Sunila PanchalPharmacist1972975100
  50. Anna PanchenkoMental Health Counselor1194892661

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

Vista, California appears in the CMS National Plan and Provider Enumeration System with 2,017 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 Vista - 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 Vista 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 Vista is weighted toward Behavior Technician (170 clinicians, followed by Addiction (Substance Use Disorder) Counselor with 133 and Marriage & Family Therapist with 132). 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, Vista reports roughly 5.2 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 Analyst is the most prominent one with no provider currently listing a Vista practice address, a coverage gap Vista patients typically fill by traveling to a larger nearby hub.

For Vista 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 Vista, CA?

There are 2,017 registered healthcare providers in Vista, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Vista?

The most common specialties in Vista are Behavior Technician, Addiction (Substance Use Disorder) Counselor, Marriage & Family Therapist, Clinical Social Worker, Mental Health Counselor. Behavior Technician has the most providers with 170.

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.