Medical groups in Ann Arbor, MI
- Medical groups
- 84
- Multi-specialty
- 17
- Single-specialty
- 67
- More than one site
- 46
- 100+ physicians
- 3
There are 84 medical groups in Ann Arbor with a Medicare PAC ID. University of Michigan Health is the largest, with 2,730 Michigan physicians, followed by Trinity Health IHA Medical Group with 1,101. 56% of Ann Arbor groups are independent.
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University of Michigan Health is the largest medical group in Ann Arbor, with 2,730 physicians
Ranked by physicians with a Michigan address linked to each group based in Ann Arbor. Trinity Health IHA Medical Group is second with 1,101, and Anesthesia Associates of Ann Arbor (A4) third with 113. 3 Ann Arbor groups have 100 or more physicians.
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Showing 1 to 10 of 84 medical groups in Ann Arbor
Sources: Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Affiliation Data
University of Michigan has the most physicians in Ann Arbor medical groups, with 2,752 across 6 groups
Dmand AI maps every Ann Arbor medical group to its parent organization, up to the health system or platform at the top. 3 parent organizations have two or more Ann Arbor medical groups. Among health systems, Trinity Health has the most groups, 8. Each clinician counts once per parent organization.
See every medical group, site and clinician under University of Michigan
Org Hierarchy Explorer maps every group, site of care and clinician under the parent, with the leaders at each group.
Source: Dmand AI Org Hierarchy Data
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Dmand AI maps the owners, administrators and physician leaders at each of the 84 Ann Arbor medical groups, with the parent organization above each one, and finds validated work emails and mobile numbers.
56% of Ann Arbor medical groups are independent, with no larger parent organization
A group counts as independent when no health system, platform or other organization sits above it in the org hierarchy. Every other group belongs to a larger organization.
Ann Arbor medical groups by ownership
- Independent47
- Health system or hospital14
- Platform or corporate owner9
- Community or government5
- Other organization9
Source: Dmand AI Org Hierarchy Data
17 Ann Arbor medical groups practice at a hospital site
Beyond their own offices, groups practice at the sites of care linked to them in the org hierarchy. A group can practice at several kinds of site, so the shares overlap.
Ann Arbor medical groups by site of care
- Hospitals17
- Ambulatory surgery centers3
- Skilled nursing facilities3
- FQHCs3
- Behavioral health facilities3
- Hospices1
Sources: Dmand AI Practice Data and Dmand AI Org Hierarchy Data
Behavioral and mental health groups are the most common medical groups in Ann Arbor, with 35
Each group is counted once, under its main specialty. Primary care groups are second, with 15, and 17 Ann Arbor groups are multi-specialty.
- Behavioral and mental health35
- Primary care15
- Rehabilitation and therapy8
- Eye care6
- Anesthesia and pain5
- Dental and oral surgery4
- Chiropractic3
- OB/GYN and women's health3
- Dermatology1
- ENT and audiology1
- Podiatry1
- Radiology and imaging1
- Rheumatology, allergy and immunology1
Source: Dmand AI Professional Profile Data
7,050 Michigan HCPs work in Ann Arbor medical groups, 4,114 of them physicians
Each clinician is counted once, across every Ann Arbor group they are linked to. Only clinicians with a Michigan address are counted.
HCPs in Ann Arbor medical groups by type
- Physicians (MD, DO)4,114
- Nurses and nurse practitioners1,347
- Physician assistants733
- Behavioral health clinicians450
- Therapists (PT and OT)184
- Other HCPs222
Source: Dmand AI Affiliation Data
Each Ann Arbor medical group profile shows the parent, sites, clinicians and identifiers
- Clinicians and specialtiesA count by specialty and a sample of the group's cliniciansOn every profile
- Practice locationsMain site and a sample of practice locations, with a count of the restOn every profile
- Medicare Part B paymentsMedicare payments to the group, from CMSOn every profile
- Group NPI and Medicare PAC IDIdentifiers for matching records across sourcesOn every profile
- Parent organizationThe health system, platform or owner above the groupOn every profile
- Every clinician and siteThe full roster and every practice locationWith a free account
- Leader and clinician contactsWork emails and mobile numbers, found on request and then validatedWith a free account
- EHR used by the group's cliniciansThe EHR in use at the group's sitesWith a free account
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Sources: Doctors and Clinicians National Downloadable File (CMS), Medicare Physician & Other Practitioners (CMS) and Dmand AI Org Hierarchy Data
Sources for the Ann Arbor medical group directory
| Data on this page | Source |
|---|---|
| Medical groups, specialties and sites | Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Professional Profile Data |
| Parent organizations and independence | Dmand AI Org Hierarchy Data |
| Physicians and HCPs | Dmand AI Affiliation Data |
| Group NPI and PAC ID | NPPES NPI Registry (CMS) and Doctors and Clinicians National Downloadable File (CMS) |
Data last refreshed October 2026Report an inaccuracyRemove my information
The directory lists groups based in Ann Arbor with a Medicare PAC ID.
FAQ
Frequently asked questions about medical groups in Ann Arbor
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
How many medical groups are in Ann Arbor?
There are 84 medical groups based in Ann Arbor with a Medicare PAC ID: 17 multi-specialty and 67 single-specialty. 46 of them have more than one site.
What is the largest medical group in Ann Arbor?
University of Michigan Health, with 2,730 physicians and 4,246 HCPs with a Michigan address. Trinity Health IHA Medical Group is second with 1,101, and Anesthesia Associates of Ann Arbor (A4) is third with 113.
Which health system has the most medical groups in Ann Arbor?
By physicians, University of Michigan, with 2,752 across 6 groups, followed by Trinity Health with 1,222 and Anesthesia Associates of Ann Arbor with 117.
How many Ann Arbor medical groups are independent?
47, or 56%, have no larger parent organization in the Dmand AI org hierarchy. 14 belong to a health system or hospital and 9 to a physician platform or corporate owner.
How many Ann Arbor medical groups practice at a hospital?
17 Ann Arbor groups practice at a hospital site linked to them in the Dmand AI org hierarchy.
How do I find a medical group's NPI or PAC ID?
Each medical group profile lists the group NPI and Medicare PAC ID at the top, with the main address and phone number. The NPI comes from the NPPES NPI Registry and the PAC ID from CMS Medicare enrollment.
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