| Washington University | Saint Louis | 3,029 |
| The Curators of the University of Missouri | Columbia | 1,131 |
| Mercy Clinic Springfield Communities | Lebanon | 1,120 |
| Ssm Health Care Group | Saint Louis | 940 |
| Southeastern Physician Services PC | Saint Peters | 593 |
| Mercy Clinic East Communities | Saint Louis | 571 |
| Ssm Medical Group Inc | Saint Charles | 568 |
| Physician Groups Lc | Farmington | 521 |
| Meritas Health Corporation | Kansas City | 502 |
| Saint Francis Medical Center | Cape Girardeau | 443 |
| Heartland Regional Medical Center | St Joseph | 394 |
| Freeman-Oak Hill Health System | Joplin | 394 |
| University Health Physicians | Kansas City | 350 |
| Lester E Cox Medical Centers | Springfield | 345 |
| Compass Health Inc | Columbia | 326 |
| Mercy Clinic Joplin LLC | Joplin | 295 |
| Hannibal Regional Healthcare System Inc | Hannibal | 272 |
| Western Anesthesiology Associates Inc | Chesterfield | 256 |
| Boone Physician Services LLC | Columbia | 250 |
| Lester E Cox Medical Centers | Ozark | 246 |
| Aging Well Health Care, LLC | Saint Louis | 238 |
| Truman Medical Center Incorporated | Kansas City | 236 |
| Lester E Cox Medical Centers | Springfield | 232 |
| Burrell Inc | Springfield | 221 |
| Skaggs Community Hospital Association | Branson | 221 |
| Empowerme Rehabilitation Missouri LLC | Saint Charles | 216 |
| Southeast Missouri Hospital Physicians LLC | Cape Girardeau | 209 |
| Serc Rehabilitation Partners, LLC | Sedalia | 209 |
| Metro-West Anesthesia Group Inc | Saint Charles | 205 |
| Sound Physicians of Illinois LLC | Lake Saint Louis | 193 |
| Mercy Clinic Surgical Specialists LLC | Saint Louis | 182 |
| Washington University Physicians in Illinois Inc | Saint Louis | 175 |
| Mercy ACO Clinical Services Inc | Chesterfield | 170 |
| Ability Kc | Kansas City | 167 |
| Ssm Health Care St Louis | Saint Charles | 167 |
| Ssm Regional Health Services | Jefferson City | 166 |
| Ozarks Medical Center | West Plains | 156 |
| Health Facilities Rehab Services Inc | Sikeston | 154 |
| Empowerme Wellness Kansas City, LLC | Kansas City | 147 |
| Citizens Memorial Healthcare | Bolivar | 146 |
| Curana Health of Missouri-Kansas LLC | Saint Louis | 146 |
| St Anthonys Physician Organization Hospitalist Services Lc | Saint Louis | 144 |
| Cortlyn Therapy PC | Valley Park | 142 |
| Golden Valley Memorial Hospital District | Clinton | 139 |
| Lake Regional Health System | Osage Beach | 138 |
| Mercy Clinic Adult Hospitalists - St. Louis, LLC | Saint Louis | 137 |
| The Childrens Mercy Hospital | Kansas City | 135 |
| New Liberty Hospital Corporation | Liberty | 135 |
| Missouri Delta Medical Center | Sikeston | 134 |
| Physical Therapy Spine and Sports Medicine LLC | Ballwin | 129 |
| Total Access Urgent Care PC | Saint Louis | 126 |
| Northland Physical Therapy and Rehab Services Inc | Lees Summit | 125 |
| Missouri Baptist Medical Center | Saint Louis | 124 |
| Pcrmc Medical Group Inc | Waynesville | 120 |
| Jefferson City Medical Group PC | Jefferson City | 119 |
| Bothwell Regional Health Center | Sedalia | 118 |
| Mercy Hospital Perry | Perryville | 117 |
| American Multispecialty Group Inc | Saint Charles | 116 |
| Phelps County Regional Medical Center | Rolla | 116 |
| Axes Physical Therapy LLC | Saint Peters | 116 |
| Mercy Clinic Heart and Vascular LLC | Saint Louis | 113 |
| Ch Specialty Services Mo LLC | Saint Louis | 108 |
| Mercy East Ambulatory Services LLC | Chesterfield | 105 |
| Washington University Community Specialists LLC | Saint Louis | 105 |
| Ssm Health Slu Hospital Anesthesia Physician Billing LLC | Saint Louis | 102 |
| West County Radiological Group Inc | Saint Louis | 102 |
| Mercy Hospitals East Communities | Saint Louis | 98 |
| Miracl LLC | Rolla | 98 |
| Southeastern Emergency Physicians of Memphis LLC | Farmington | 94 |
| Urology of St Louis Inc | Saint Peters | 94 |
| Sgoh Acquisition Inc | Rogersville | 93 |
| McPherson Medical and Diagnostic LLC | Kennett | 93 |
| Columbia Orthopaedic Group LLP | Columbia | 92 |
| Elite Physical Therapy of Creve Coeur LLC | Creve Coeur | 91 |
| Cherry Health Center, LLC | Springfield | 89 |
| Northstar Anesthesia of Missouri LLC | Joplin | 89 |
| Radiology Associates of the Main Line P C | Saint Louis | 88 |
| Ozark Anesthesia Associates Inc | Springfield | 87 |
| Emergency Medicine Services of Mo LLC | Lee's Summit | 86 |
| Nevada City Hospital | Nevada | 85 |
| South County Anesthesia Associates Ltd | Saint Louis | 84 |
| Arnold Physical Therapy and Sports Medicine LLC | Saint Louis | 83 |
| Clarkson Optometry Inc | O Fallon | 82 |
| Physician Specialists of St Lukes LLC | Chesterfield | 82 |
| Missouri Hb Medical Services LLC | Poplar Bluff | 78 |
| Mosaic Medical Center - Maryville | Maryville | 77 |
| Tapestry Telehealth PLLC | Chesterfield | 76 |
| Prime Healthcare Kansas City - Physician Services LLC | Kansas City | 75 |
| Ste Genevieve County Memorial Hospital | Ste Genevieve | 71 |
| Kansas City Urology Care PA | Independence | 71 |
| Capital Anesthesia Solutions of Missouri LLC | Kansas City | 68 |
| Carroll County Memorial Hospital | Carrollton | 67 |
| St. Louis Behavioral Medicine Institute Inc | Saint Louis | 67 |
| Kansas Carenow Urgent Care LLC | Blue Springs | 67 |
| Mercy Clinic Gastroenterology LLC | Washington | 67 |
| Key Rehabilitation Inc | Gladstone | 67 |
| Western Missouri Medical Center | Warrensburg | 66 |
| Bjc Behavioral Health | Farmington | 65 |
| Healing Arts Center L.L.C. | Branson | 65 |
| Cameron Regional Medical Center Inc | Cameron | 63 |