NPPES file of Aug 9, 2026

Doctors and health care providers in Mesa, AZ

9,151 individual NPPES records list a practice address in Mesa, 4th of 137 Arizona cities. The largest group is behavior technician: 554, 6% of the city's records, against 6% across Arizona. Page 123 of 184.

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

The 8 largest groups in Mesa

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

Mesa in Arizona

  • Rank in Arizona4th of 137 cities by records
  • Share of the state7.2% of Arizona's records
  • Specialties present25 or more taxonomy codes
  • Top three groups15.8% of all records
  • Behavior Technician rank6th of the 10 Arizona cities with the most

Compared with Arizona as a whole, Mesa has 1.8× the state's share of physician assistant records and 0.65× its share of registered nurse records.

Providers in Mesa, alphabetically

  1. Kearalyn OosthuizenMental Health Counselor1659215804
  2. Jaroslaw Opechowski, MDPsychiatry Physician1689753352
  3. Thomas Opechowski, M.D.Psychiatry Physician1285713636
  4. Morgan OpelaBehavior Technician1164345161
  5. Ammon Opie, DCChiropractor1437712528
  6. Douglas Opie, DCChiropractor1336100437
  7. Ronald Opris, PHARMDPharmacist1023617693
  8. John Opuroku, LPCProfessional Counselor1700433091
  9. Robert Orava, MDEmergency Medicine Physician1427085141
  10. Meghan OrbegosoPsychiatric/Mental Health Nurse Practitioner1053923573
  11. Katharine Ordway, LMSWClinical Social Worker1942029434
  12. Jocelyn OrePhysician Assistant1033685763
  13. Lisa Oregan, PTGeriatric Physical Therapist1912297813
  14. Sean Oregan, M.D.Internal Medicine Physician1164486460
  15. Rachel OreillyBehavior Technician1144829490
  16. Jacqueline OrellanaPhysician Assistant1578257846
  17. Jennifer OrlandoBehavior Technician1821764937
  18. Jade OronaSpeech-Language Pathologist1366361222
  19. Marissa OroscoStudent in an Organized Health Care Education/Training Program1306781380
  20. Ashley OrozcoProfessional Counselor1588534721
  21. Neicea OrozcoSpeech-Language Pathologist1588182588
  22. Alyssa Orr, FNP-BCFamily Nurse Practitioner1770324964
  23. Micaela Orr, MS SLPSpeech-Language Pathologist1043829880
  24. Brian Orrell, DPTPhysical Therapist1487280137
  25. Chelsea OrsoSpeech-Language Pathologist1104219302
  26. Alexis Ortega, COTA/LContractor1972750677
  27. Diane Ortega, C.N.M.Advanced Practice Midwife1649402827
  28. Larry OrtegaPhysical Therapy Assistant1144822677
  29. Orestes Ortega, NURSE PRACTITIONERFamily Nurse Practitioner1689352767
  30. Ashley Ortiz, PA-CPsychiatric/Mental Health Nurse Practitioner1578969739
  31. Salina Ortiz, RBTBehavior Technician1326701442
  32. Jessica Ory, COTA/LOccupational Therapy Assistant1952252926
  33. Blessing Osawaru, MSN, FNP-CFamily Nurse Practitioner1255252326
  34. Kelsie OsborneBehavior Analyst1912485988
  35. Lauren Osbourne, APRN- FNP-CFamily Nurse Practitioner1790476299
  36. Carolyn Osenbau, LACMental Health Counselor1487231221
  37. Fredrick Osorio, M.D.Nephrology Physician1306830229
  38. Gabriela Osorio, RNRegistered Nurse1134718604
  39. Kenneth Osorio, MDPhlebology Physician1245229087
  40. Raul Osorio, MDGynecology Physician1952380453
  41. Melissa Ostaszewski, CCPPerfusionist1871844969
  42. Crystal Ostermeyer, PA-CPhysician Assistant1972848315
  43. Nathan Ostler, FNP-CFamily Nurse Practitioner1023412301
  44. Dow Ostlund, MA, MS, LACMental Health Counselor1669262119
  45. Tammy Ostroski, APNPFamily Nurse Practitioner1326230673
  46. Kristen Ota, PHARMDPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1003395658
  47. Renee Otte, RNRegistered Nurse1992352256
  48. Sarah Otter, DOFamily Medicine Physician1386149623
  49. Elizabeth Ottney, DOFamily Medicine Physician1154397933
  50. Michone Ouellette, D.C.Chiropractor1831274448

The largest Arizona cities

  1. Phoenix31,399
  2. Tucson18,788
  3. Scottsdale11,008
  4. Gilbert5,802
  5. Chandler5,497

All of Arizona →

How to read this directory

Mesa, Arizona appears in the CMS National Plan and Provider Enumeration System with 9,151 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 Mesa - 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 Mesa 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 Mesa is weighted toward Behavior Technician (554 clinicians, followed by Physician Assistant with 472 and Speech-Language Pathologist with 424). 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 Arizona's population, Mesa reports roughly 123.1 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.

For Mesa 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 Mesa, AZ?

There are 9,151 registered healthcare providers in Mesa, AZ, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Mesa?

The most common specialties in Mesa are Behavior Technician, Physician Assistant, Speech-Language Pathologist, Physical Therapist, Family Nurse Practitioner. Behavior Technician has the most providers with 554.

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.