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Workplaces
Medical Groups
Medical groups that bill Medicare, from small practices to health systems, with their clinicians by specialty, practice locations and hospitals. Choose a state or search by name.
Where the medical groups are
The 3,000 largest practice locations; larger dots have more clinicians at that address. Hover over a dot for details and select it to open; select a state to see its own map and list.
83,665 groups, largest first
| Group | Clinicians | Locations |
|---|---|---|
| Southern California Permanente Medical Group California |
11,293 | 211 |
| Permanente Medical Group Inc California |
10,996 | 221 |
| Cleveland Clinic Mainly Ohio · 4 states |
7,090 | 217 |
| North Shore-Lij Medical PC Mainly New York · 24 states |
6,440 | 687 |
| New York University Mainly New York · 19 states |
6,134 | 218 |
| Mayo Clinic Mainly Minnesota · 5 states |
4,956 | 42 |
| Northwestern Medical Faculty Foundation Illinois |
4,503 | 281 |
| Iu Health Medical Group LLC Mainly Indiana · 16 states |
4,462 | 143 |
| University of Pittsburgh Physicians Mainly Pennsylvania · 3 states |
4,236 | 218 |
| Ihc Health Services Inc Mainly Utah · 4 states |
3,960 | 436 |
| Allina Health System Mainly Minnesota · 2 states |
3,842 | 167 |
| Sutter Bay Medical Foundation Mainly California · 17 states |
3,829 | 325 |
| Aurora Medical Group, Inc. Mainly Wisconsin · 2 states |
3,813 | 178 |
| Medstar Medical Group II LLC Mainly Maryland · 20 states |
3,767 | 142 |
| The Emory Clinic Inc Mainly Georgia · 2 states |
3,568 | 3 |
| Vanderbilt University Medical Center Mainly Tennessee · 25 states |
3,567 | 204 |
| Massachusetts General Physicians Organization Inc Mainly Massachusetts · 8 states |
3,558 | 72 |
| The Association of University Physicians Mainly Washington · 5 states |
3,535 | 43 |
| University of Penn - Medical Group Mainly Pennsylvania · 2 states |
3,505 | 251 |
| Geisinger Clinic Mainly Pennsylvania · 19 states |
3,467 | 231 |
| Endeavor Health Medical Group Illinois |
3,350 | 197 |
| Regents of the University of Michigan Michigan |
3,346 | 103 |
| Legacy Healthcare Services Inc Mainly North Carolina · 24 states |
3,223 | 391 |
| University Physicians Incorporated Mainly Colorado · 6 states |
3,215 | 55 |
| University of Texas Southwestern Medical Center at Dallas Texas |
3,187 | 167 |
| Duke Health Integrated Practice, Inc Mainly North Carolina · 8 states |
3,185 | 132 |
| Stanford Health Care Mainly California · 7 states |
3,122 | 29 |
| Advocate Health and Hospitals Corporation Mainly Illinois · 2 states |
3,118 | 264 |
| Wellstar Medical Group LLC Mainly Georgia · 2 states |
3,093 | 291 |
| Washington University Mainly Missouri · 14 states |
3,029 | 197 |
| Brigham and Womens Physicians Organization Inc Mainly Massachusetts · 3 states |
2,994 | 37 |
| Johns Hopkins University Mainly Maryland · 4 states |
2,909 | 78 |
| Ochsner Clinic LLC Mainly Louisiana · 3 states |
2,864 | 108 |
| Icahn School of Medicine at Mount Sinai Mainly New York · 2 states |
2,843 | 165 |
| Montefiore Medical Center Mainly New York · 4 states |
2,820 | 124 |
| University of Alabama Health Services Foundation, PC Alabama |
2,814 | 20 |
| Phoenix Rehabilitation and Health Services Inc Pennsylvania |
2,800 | 3 |
| Physicians Referral Service Texas |
2,765 | 14 |
| U S Anesthesia PArtners of Texas, PA Texas |
2,752 | 202 |
| Healthtexas Provider Network Mainly Texas · 3 states |
2,697 | 269 |
| Wake Forest University Health Sciences North Carolina |
2,645 | 143 |
| Yale University Connecticut |
2,645 | 58 |
| Mainehealth Maine |
2,633 | 166 |
| Henry Ford Health System Michigan |
2,570 | 62 |
| University of Wisconsin Medical Foundation Inc Mainly Wisconsin · 2 states |
2,553 | 110 |
| Lehigh Valley Physician Group Mainly Pennsylvania · 8 states |
2,542 | 266 |
| Umass Memorial Medical Group Inc Mainly Massachusetts · 10 states |
2,516 | 139 |
| Sutter Valley Medical Foundation Mainly California · 19 states |
2,500 | 180 |
| Prisma Health University Medical Group South Carolina |
2,493 | 250 |
| Wellspan Medical Group Mainly Pennsylvania · 2 states |
2,480 | 323 |
Source: CMS Doctors and Clinicians national file (Care Compare). Groups are organizations clinicians bill Medicare through; a health system may report several groups. Hospitals →
About this page
Medical groups and practices employ most U.S. doctors today. This directory lists every medical group enrolled in Medicare with at least two clinicians. For each one, it shows how many doctors, nurse practitioners and other clinicians it has, their specialties, the addresses where they practice and the hospitals they work with.
Find medical groups on the map
The map shades each state by medical groups per 100,000 residents. The dots show the largest practice locations, and larger dots have more clinicians at that address. First, select a state to see its own map and list. Then hover over a dot for details, and select it to open the group.
What each medical group page shows
- Every practice location, largest first, with a map.
- The clinicians at each location, by specialty.
- The hospitals its clinicians list as places they work.
Why medical groups matter
Many patients choose a practice rather than a single doctor. For example, a large group can offer primary care, specialists and imaging in one place. In contrast, a small practice may offer more continuity with one clinician. For doctors, the group is often the employer. As a result, its size, locations and hospital ties shape the job.
Group data comes from the CMS Doctors and Clinicians (opens in a new tab) files. Related: hospitals, find a doctor, evaluating your first job after residency.
Questions about medical groups
What is a medical group? A medical group is a practice where two or more clinicians bill Medicare together under one organization. It can be a small office or a large system with hundreds of locations.
How do I find a doctor in a medical group? Open the group, then choose the location nearest you. The page lists the clinicians at that address by specialty. In addition, you can search for the group by name in find a doctor.
Why are some medical groups missing? We list groups enrolled in Medicare with at least two clinicians. So solo practices and groups that never bill Medicare do not appear here.