| Cleveland Clinic | Cleveland | 7,090 |
| Ohiohealth Corporation | Columbus | 2,314 |
| University Hospitals Medical Group Inc | Cleveland | 2,294 |
| University of Cincinnati Physicians Company LLC | Cincinnati | 1,506 |
| Sondermind Provider Network LLC | Columbus | 1,339 |
| Osu Internal Medicine LLC | Columbus | 1,161 |
| The Metrohealth System | Cleveland | 1,144 |
| University Primary Care Practices Inc | Conneaut | 1,079 |
| Trihealth H LLC | Cincinnati | 850 |
| Promedica Central Physicians | Toledo | 785 |
| Children's Hospital Medical Center | Cincinnati | 711 |
| Kettering Independent Medical Group Inc | Xenia | 710 |
| Summa Physicians LLC | Akron | 671 |
| Psychological and Behavioral Consultants LLC | Beachwood | 624 |
| Premier Health Specialists Inc | Dayton | 580 |
| Central Ohio Primary Care Physicians, Inc. | Columbus | 488 |
| Mercy Health Physicians Youngstown Specialty Care LLC | Warren | 472 |
| Beacon Orthopaedics and Sports Medicine Ltd | Granville | 471 |
| Oxford Physical Therapy and Rehabilitation | Mason | 440 |
| Osu Observation Medicine, LLC | Columbus | 436 |
| Partners Physician Group | Akron | 413 |
| Mvhe Inc | Middletown | 408 |
| University of Toledo Physicians LLC | Toledo | 403 |
| Kings Daughters Medical Specialties Inc | Wheelersburg | 400 |
| Marietta Memorial Hospital | Marietta | 392 |
| Aegis Group Practice LLC | Toledo | 390 |
| Somc Medical Care Foundation, Inc. | Portsmouth | 389 |
| Adena Medical Group LLC | Chillicothe | 386 |
| Southwest Ohio Anesthesia Consultants LLC | Cincinnati | 361 |
| Mercy Health Physicians North Specialty Care LLC | Maumee | 355 |
| Empowerme Rehabilitation Illinois LLC | Springboro | 354 |
| Mercy Health Physicians Cincinnati Specialty Care LLC | Cincinnati | 349 |
| Alliance Physicians Inc | West Carrollton | 324 |
| Trihealth G LLC | Cincinnati | 299 |
| Wooster Clinic LLC | Wooster | 299 |
| Columbus Radiology Corp | Columbus | 292 |
| Orthopedic One, Inc. | Upper Arlington | 282 |
| Osu General Internal Medicine LLC | Columbus | 276 |
| The Christ Hospital Medical Associates, LLC | Cincinnati | 274 |
| Promedica Multi Specialty Physicians | Toledo | 270 |
| Genesis Medical Group, LLC | Zanesville | 270 |
| Holzer Clinic LLC | Gallipolis | 269 |
| Pediatric Academic Association, Inc. | Columbus | 260 |
| Premier Therapy and Health Centers Inc | Wheelersburg | 258 |
| Triad Health Services LLC | Youngstown | 258 |
| Mercy Health Physicians Lima Specialty Care LLC | Lima | 253 |
| Northern Ohio Medical Specialists,llc | Youngstown | 251 |
| Phs Anesthesia Billing, LLC | Middletown | 249 |
| Licking Memorial Professional Corporation | Newark | 234 |
| Usacs Integrated Acute Care Services of Ohio LLC | Cincinnati | 233 |
| Mount Carmel Healthproviders Two LLC | Dublin | 225 |
| Dayton Anesthesia and Pain Services LLC | Akron | 222 |
| Southwest General Medical Group Inc | Cleveland | 221 |
| Osu Surgery, LLC | Columbus | 210 |
| Toledo Clinic Incorporated | Toledo | 210 |
| The Little Clinic of Ohio LLC | Columbus | 210 |
| North Central Ohio Family Care Center Inc | Galion | 195 |
| Pai Participant 1 LLC | Chillicothe | 191 |
| Osu Radiology LLC | Columbus | 191 |
| Mercy Health Physicians Cincinnati LLC | Liberty Township | 190 |
| Central Ohio Hospitalists, Inc | Columbus | 190 |
| Minuteclinic Diagnostic of Ohio LLC | Cleveland | 188 |
| Marion Area Physicians LLC | Marion | 181 |
| Osu Emergency Medicine LLC | Columbus | 174 |
| Cg Medical Associates Inc | Cincinnati | 173 |
| Lima Memorial Professional Corporation | Lima | 165 |
| Midwest Physician Anesthesia Services, Inc. | Columbus | 160 |
| Cei Physicians PSC, LLC | Blue Ash | 158 |
| Hospitalist Medicine Physicians of Ohio, Professional Corporation | Columbus | 158 |
| Bel-Park Anesthesia Associates, Inc. | Youngstown | 155 |
| Ohrh, LLC | Delaware | 154 |
| Reynolds Memorial Hospital, Inc | Shadyside | 153 |
| Wrh Physicians, Inc | Cuyahoga Falls | 152 |
| The Christ Hospital Cardiovascular Associates LLC | Cincinnati | 152 |
| Osup Community Outreach LLC | Westerville | 151 |
| Trinity West | Steubenville | 148 |
| Oh Independent Medical Group LLC | Tallmadge | 144 |
| Fox Rehabilitation Services Oh, LLC | Worthington | 143 |
| Nationwide Children's Hospital | Columbus | 142 |
| Mount Carmel Healthproviders Inc | Grove City | 142 |
| Children's Hospital Medical Center of Akron | Akron | 141 |
| Ohio Physician Professional Corporation | Canton | 141 |
| Osu Psychiatry LLC | Columbus | 138 |
| Mercy Health Physicians Lorain Specialty Care LLC | Lorain | 137 |
| Radia California Radiology Medical Group Inc | Marietta | 136 |
| Mercy Health Physicians Springfield Specialty Care LLC | Springfield | 135 |
| Fairfield Healthcare Professionals Inc | Lancaster | 134 |
| Eventus Wholehealth Midwest Inc | Hilliard | 133 |
| Mercy Health Physicians-North LLC | Toledo | 132 |
| Anesthesia Associates of Cincinnati, Inc | Cincinnati | 130 |
| Ohio Valley Physicians Inc | Gallipolis | 129 |
| Ohio Anesthesia Group, Inc | Wooster | 128 |
| Ohiohealth Urgent Care LLC | Dublin | 127 |
| Premier Anesthesia of Ohio LLC | Grove City | 126 |
| Christ Hospital Medical Specialists LLC | Cincinnati | 125 |
| Radia Oregon Radiology Medical Group LLC | Marietta | 121 |
| Emergency Professional Services, Inc. | Upper Sandusky | 121 |
| Osu Neuroscience Center LLC | Columbus | 121 |
| Knox Community Hospital | Mount Vernon | 120 |
| Sandusky Anesthesia LLC | Kettering | 120 |