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 205 of 313.
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
- Florence O'Gara, LMSW, RNClinical Social Worker1548455272
- Levon O'Haodha, MDEmergency Medicine Physician1700905213
- Patrick O'HayerStudent in an Organized Health Care Education/Training Program1659932564
- Emily O'KeefePharmacist1104718618
- Sean O'Keefe, M.D.Internal Medicine Physician1811526759
- Heather O'Mahen Willis, PHDMental Health Counselor1063520708
- Mackenzie O'MalleyBehavior Technician1972177145
- Andrea O'Neil, LMSWClinical Social Worker1649315250
- Tara O'NeilCase Manager/Care Coordinator1386421014
- Casey O'Neill, LLMSWSocial Worker1508539701
- Dana O'Neill, D.O.Family Medicine Physician1023305216
- Jennifer O'NeillObstetrics & Gynecology Physician1437545431
- Jessica O'Neill, PHARM.D.Pharmacist1215033733
- Morgan O'Neill, DOStudent in an Organized Health Care Education/Training Program1669213948
- Kevin O'Reilly, DOInternal Medicine Physician1952693079
- Michael O'Reilly, MDAnesthesiology Physician1760400253
- Elisa O'Riordan, MA, RDRegistered Dietitian1821936808
- Alyssa O'Rourke, NPFamily Nurse Practitioner1730826801
- Lindsay O'Rourke, LLPCProfessional Counselor1639864382
- Robert O'Rourke, MDSurgery Physician1346256955
- Riley O'RyanPhysical Therapy Assistant1265884563
- Jessica O'Shea, CGCGenetic Counselor (M.S.)1811474042
- Kelly O'Shea, MDAllergy & Immunology Physician1427445022
- Timothy O'Shea, DMDDentist1558713842
- Daniel O'TooleGeneral Practice Dentistry1013005776
- Daniel O'Toole, OTRLOccupational Therapist1326608167
- Alice OakesBehavior Technician1275203317
- Emery OakesBehavior Technician1235002858
- Faye Oakes, MDAnatomic Pathology & Clinical Pathology Physician1396488730
- Nosazena ObasekiPsychologist1346043445
- Joy ObayemiGeneral Practice Physician1457974834
- Kelly Oberhelman, PAPhysician Assistant1003967811
- Andrea Obi, MDVascular Surgery Physician1851554570
- Ekenedirichukwu ObiPharmacist1336970359
- Susan OblenderGerontology Occupational Therapist1508374398
- Colleen Obrien, RNRegistered Nurse1972634574
- Tulicaa OchaniBehavior Technician1891653507
- Hanna OchsBehavior Technician1790353399
- James Oconnor, D.O.Adult Medicine Physician1659442184
- Lauren OconnorOccupational Therapist1194212803
- Jashan Octain, M.D.Internal Medicine Physician1356636997
- Mary Odalovich, NPNurse Practitioner1285821751
- David Odell, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1033354592
- Kenechukwu OdenigboStudent in an Organized Health Care Education/Training Program1245024488
- Folafoluwa Odetola, MB, CHBPediatric Critical Care Medicine Physician1376557397
- Dominic Oehler, BSN, RNCommunity Health Registered Nurse1104516137
- Steve Oestreich, ATCAthletic Trainer1992734438
- Samantha Oetting, LMTMassage Therapist1780253682
- Henry Oexmann, MDChild & Adolescent Psychiatry Physician1720615180
- Linda Offerle, R.D.Registered Dietitian1356442545
The largest Michigan cities
- Farmington Hills36,305
- Detroit19,832
- Grand Rapids18,005
- Novi7,641
- Kalamazoo6,553
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.