| Regents of the University of Michigan | Ann Arbor | 3,346 |
| Henry Ford Health System | Detroit | 2,570 |
| Spectrum Health Primary Care Partners | Grand Rapids | 2,294 |
| Iha Health Services Corporation | Pontiac | 1,168 |
| Beaumont Medical Group- Specialty Services | Berkley | 847 |
| Edward W Sparrow Hospital Association | Lansing | 730 |
| Bronson Methodist Hospital | Kalamazoo | 729 |
| Powerback Rehabilitation LLC | Jackson | 649 |
| Beaumont Medical Group Hospital Based Services | Royal Oak | 584 |
| Northstar Anesthesia of Michigan III PLLC | Dearborn | 561 |
| Michigan Healthcare Professionals PC | Clarkston | 529 |
| Mymichigan Medical Center Midland | Midland | 507 |
| Advantage Health/Saint Mary's Medical Group | Caledonia | 505 |
| Covenant Medical Center, Inc. | Saginaw | 480 |
| W.A. Foote Memorial Hospital | Jackson | 476 |
| Metropolitan Hospital | Wyoming | 415 |
| University Physician Group | Detroit | 403 |
| Munson Medical Center | Traverse City | 384 |
| McLaren Hospital Group | Pontiac | 375 |
| Henry Ford Health Providence Hospital | Novi | 375 |
| Center for Physical Rehabilitation and Therapy LP | Grand Rapids | 369 |
| Center for Physical Rehabilitation Inc | Grand Rapids | 357 |
| Henry Ford Macomb Hospital Corporation | Sterling Heights | 355 |
| Pine Rest Christian Mental Health Services | Grand Rapids | 353 |
| Henry Ford Health St. John Hospital | Detroit | 348 |
| Hurley Medical Center | Flint | 342 |
| Downriver Mental Health Clinic PC | Grand Rapids | 299 |
| Lakeland Medical Practices | Saint Joseph | 281 |
| Oakwood Ambulatory LLC | Westland | 274 |
| Ascension Medical Group Promed | Kalamazoo | 262 |
| Advanced Radiology Services PC | Grand Rapids | 253 |
| Richard Kneip PHD PC | Clarkston | 247 |
| Henry Ford Semi Medical Group | Macomb | 240 |
| Anesthesia Associates of Ann Arbor PLLC | Pontaic | 219 |
| Vhs Physicians of Michigan | Commerce Township | 219 |
| Memorial Hospital | Perry | 214 |
| McLaren Medical Group | Lansing | 213 |
| Independent Emergency Physicians PC | Southfield | 205 |
| Ecs Western Michigan PC | Grand Rapids | 201 |
| Henry Ford Wyandotte Hospital | Wyandotte | 200 |
| Msu Health Care Inc. | East Lansing | 198 |
| Optum Behavioral Care of Colorado PC | Ann Arbor | 197 |
| Dlp Marquette Physician Practices Inc | Marquette | 197 |
| Northstar Anesthesia of Michigan PLLC | Detroit | 196 |
| Munson Medical Group | Traverse City | 194 |
| Bronson Battle Creek Hospital | Battle Creek | 193 |
| McLaren Central Michigan | Mount Pleasant | 182 |
| Holland Community Hospital | Grand Haven | 178 |
| Mymichigan Medical Group | Midland | 174 |
| Saint Mary's Health Services | Grand Rapids | 173 |
| Henry Ford Health Macomb Oakland Hospital | Warren | 172 |
| Sound Inpatient Physicians-Michigan PLLC | Port Huron | 171 |
| Aspirus Ironwood Hospital and Clinics Inc | Ironwood | 165 |
| Spectrum Health Hospitals | Grand Rapids | 160 |
| Counseling Center of West Michigan LLC | Byron Center | 159 |
| Ivyrehab Michigan LLC | Hart | 156 |
| Mymichigan Medical Center Alma | Alma | 145 |
| Asa Staffing Inc | Port Huron | 145 |
| McLaren Flint | Flint | 143 |
| Independent Observation Physicians PLLC | Jackson | 141 |
| Pic Indiana PC | Battle Creek | 140 |
| Mary Free Bed Rehabilitation Hospital | Traverse City | 137 |
| Premier Therapy Centers, Inc | West Bloomfield | 137 |
| Easterseals Morc Health Care, Inc | Auburn Hill | 136 |
| Kalamazoo Anesthesiology P C | Kalamazoo | 135 |
| McLaren Macomb | Mount Clemens | 133 |
| Hulst Jepsen Physical Therapy Inc | Grand Rapids | 132 |
| Mymichigan Medical Center Clare | Mt Pleasant | 131 |
| Lakeland Hospitals at Niles and St Joseph Inc | Saint Joseph | 131 |
| Michigan Orthopaedic Surgeons PLLC | Beverly Hills | 127 |
| Wellstreet Urgent Care of Michigan | Macomb | 125 |
| Michigan Rehabilitation Specialists of Fowlerville LLC | Dexter | 124 |
| University Pediatricians | Detroit | 121 |
| Munson Healthcare Otsego Memorial Hospital | Gaylord | 120 |
| Orthopaedic Associates of Muskegon PC | Muskegon | 116 |
| Mymichigan Medical Center Saginaw | Bay City | 115 |
| Aspirus Keweenaw | Laurium | 115 |
| Grand Traverse Physician Services PC | Traverse City | 113 |
| Epmg of Michigan PC | Brighton | 113 |
| McLaren Bay Region | Bay City | 113 |
| Henry Ford Urgent Care | Chesterfield | 112 |
| Henry Ford Health Rochester Hospital | Rochester | 112 |
| Mercy Physician Network | Spring Lake | 112 |
| Promedica Central Corporation of Michigan | Adrian | 111 |
| Cancer and Hematology Centers of Western Mi, P.C. | Holland | 110 |
| Probility Therapy Services | Livonia | 108 |
| Pure Psychiatry of Michigan PLLC | Fort Gratiot | 107 |
| Munson Healthcare Cadillac | Cadillac | 103 |
| Mymichigan Medical Center Sault | Sault S Marie | 102 |
| Sjmhs Anesthesia Services | Ypsilanti | 102 |
| Huron Gastroenterology Associates PC | Livonia | 99 |
| McLaren Greater Lansing | Lansing | 99 |
| Henry Ford Medical Group Genesys | Burton | 97 |
| Rau Physical Therapy Inc | Frankenmuth | 96 |
| Long Lake Anesthesiology Consultants PLC | Troy | 95 |
| Dearborn Physical Therapy Ltd | Dearborn | 94 |
| Uwh of Michigan PLC | Mason | 92 |
| Jawad A Shah MD PC | Flint | 92 |
| Spectrum Health United | Greenville | 92 |
| Mymichigan Medical Center Alpena | Alpena | 91 |