NPPES file of Aug 9, 2026

Doctors and health care providers in Ann Arbor, MI

15,616 individual NPPES records list a practice address in Ann Arbor, 4th of 515 Michigan cities. The largest group is clinical social worker: 1,236, 8% of the city's records, against 6% across Michigan. Page 112 of 313.

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

The 8 largest groups in Ann Arbor

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

Ann Arbor in Michigan

  • Rank in Michigan4th of 515 cities by records
  • Share of the state5.5% of Michigan's records
  • Specialties present25 or more taxonomy codes
  • Top three groups22.1% of all records
  • Clinical Social Worker rank3rd of the 10 Michigan cities with the most

Compared with Michigan as a whole, Ann Arbor has 4.2× the state's share of anesthesiology physician records and 0.29× its share of behavior technician records.

Providers in Ann Arbor, alphabetically

  1. Brian Harry, MDClinical Pathology Physician1881075398
  2. Elizabeth Harry, M.D.Internal Medicine Physician1114169638
  3. Ghada Harsouni, M.D.Pediatrics Physician1851650782
  4. Tricia Harstough, PTPhysical Therapist1366092736
  5. Alexander Hart, MPHStudent in an Organized Health Care Education/Training Program1053061515
  6. Anita Hart, MDInternal Medicine Physician1811910318
  7. Danielle HartBehavior Analyst1851821847
  8. Eryn HartBehavior Technician1629779558
  9. Gina HartRegistered Respiratory Therapist1841681079
  10. John Hart, RNRegistered Nurse1174247571
  11. Nancy Hart, PH.D., M.S.W.Clinical Social Worker1851353775
  12. William Hart, MDAnatomic Pathology & Clinical Pathology Physician1295806669
  13. William Hart, M.D.Anesthesiology Physician1528357746
  14. Jessica HarterHealth Educator1598267049
  15. Carolyn Hartford, MSWClinical Social Worker1467419986
  16. Colin Hartgerink, MDStudent in an Organized Health Care Education/Training Program1063260586
  17. Brandi Hartley, MDOrthopaedic Surgery Physician1417199886
  18. Sarah Hartley, MDInternal Medicine Physician1780889113
  19. Brenda Hartman, PSY.D.Clinical Psychologist1396951174
  20. Heather Hartman, M.D.Surgery Physician1457764870
  21. Joseph Hartmann, DOEmergency Medicine Physician1033292792
  22. Kevern Hartmann, MPT, CMT, CLTPhysical Therapist1346632106
  23. Meredith Hartmann, LPCMental Health Counselor1790617637
  24. William HartmannStudent in an Organized Health Care Education/Training Program1003197096
  25. Linnaya Hartner, M.A, CCC-SLP, BCBASpeech-Language Pathologist1417371055
  26. Amanda Hartwell, NPFamily Nurse Practitioner1750074993
  27. Matthew Hartwell, MDSports Medicine (Orthopaedic Surgery) Physician1275074619
  28. Danielle Hartwig, RN,Pediatric Registered Nurse1205228236
  29. Thomas Hartwig, M.D.Psychiatry Physician1982865382
  30. Nancy Hartzell, D.D.S.Dentist1417007568
  31. Kaitlyn Hartzog, LMSWMental Health Counselor1144801192
  32. Nicole Harvath, NPNurse Practitioner1962280867
  33. Benjamin Harvey, PHARMDPharmacist1467258244
  34. Carrie Harvey, M.D.Emergency Medicine Physician1861770851
  35. Madelyn Harvey, MD, MS, RDNStudent in an Organized Health Care Education/Training Program1114728326
  36. Vincent Harville, PHARMDPharmacotherapy Pharmacist1336289370
  37. Mohammad Hasan, MBCHBRadiation Oncology Physician1053966465
  38. Rawan HasanPharmacist1427333400
  39. Reema Hasan, M.D.Cardiovascular Disease Physician1801007638
  40. Michele Haselhuhn, NPNurse Practitioner1003952045
  41. Jill Hasen, PAPhysician Assistant1689752131
  42. Lisa Hasenauer, RNRegistered Nurse1811603137
  43. Rula HashemDoula1508796327
  44. Sara Hashemian, MDInternal Medicine Physician1427054006
  45. Andrew Hashikawa, M.D.Emergency Medicine Physician1528046810
  46. Micheleen Hashikawa, M.D.Family Medicine Physician1235365743
  47. Farah HashimStudent in an Organized Health Care Education/Training Program1952157638
  48. Martha Hashimoto, M.D.Psychiatry Physician1699828293
  49. Kelly Haskin, R.NHome Health Registered Nurse1215221460
  50. William Hasler, MDGastroenterology Physician1346322872

The largest Michigan cities

  1. Farmington Hills36,305
  2. Detroit19,832
  3. Grand Rapids18,005
  4. Novi7,641
  5. Kalamazoo6,553

All of Michigan →

How to read this directory

Ann Arbor, Michigan appears in the CMS National Plan and Provider Enumeration System with 15,616 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 Ann Arbor - 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 Ann Arbor 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 Ann Arbor is weighted toward Clinical Social Worker (1,236 clinicians, followed by Student in an Organized Health Care Education/Training Program with 1,217 and Behavior Technician with 1,000). 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 Michigan's population, Ann Arbor reports roughly 155.6 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 Michigan's most common specialties, Family Nurse Practitioner is the most prominent one with no provider currently listing a Ann Arbor practice address, a coverage gap Ann Arbor patients typically fill by traveling to a larger nearby hub.

For Ann Arbor 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 Ann Arbor, MI?

There are 15,616 registered healthcare providers in Ann Arbor, MI, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Ann Arbor?

The most common specialties in Ann Arbor are Clinical Social Worker, Student in an Organized Health Care Education/Training Program, Behavior Technician, Nurse Practitioner, Physician Assistant. Clinical Social Worker has the most providers with 1,236.

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.