| State University of Iowa | Coralville | 1,897 |
| Iowa Physicians Clinic Medical Foundation | Des Moines | 1,246 |
| Medstream Anesthesia PLLC | Ottumwa | 573 |
| Mercy Clinics Inc | Clive | 443 |
| McFarland Clinic PC | Ames | 363 |
| The Iowa Clinic PC | Ankeny | 310 |
| Broadlawns Medical Center | Des Moines | 306 |
| Mercy Medical Center | Cedar Rapids | 305 |
| North Iowa Mercy Clinics | Mason City | 302 |
| Progressive Rehabilitation Associates LLC | Iowa City | 287 |
| Genesis Health System | Davenport | 261 |
| Southeast Iowa Regional Medical Center Inc | West Burlignton | 259 |
| Central Iowa Hospital Corporation | Des Moines | 239 |
| Covenant Medical Center Inc | Waterloo | 235 |
| Rock Valley Physical Therapy Center | Davenport | 234 |
| Medical Associates Clinic P C | Dubuque | 233 |
| Genesis Health System | De Witt | 224 |
| Trinity Regional Medical Center | Humboldt | 167 |
| Villagehealth Dm LLC | Kellogg | 160 |
| Allen Memorial Hospital Corporation | Waterloo | 157 |
| Curana Health of Iowa PLLC | Osceola | 151 |
| Alegent Creighton Health | Council Bluffs | 140 |
| Ch Specialty Services Ia PC | Osceola | 136 |
| Physicians Clinic of Iowa PC | Cedar Rapids | 135 |
| Sports Rehab and Professional Therapy Associates Inc | Storm Lake | 132 |
| Complexcare Medical Group Midwest H PLLC | Webster City | 127 |
| Unified Therapy Services, Inc | Dubuque | 120 |
| Catholic Health Initiatives-Iowa Corp | Ames | 113 |
| Orthowest, LLC | Council Bluffs | 110 |
| Des Moines Orthopaedic Surgeons PC | Des Moines | 105 |
| Grinnell Regional Medical Center | Grinnell | 105 |
| Mercy Physician Associates Inc | Hiawatha | 101 |
| Winneshiek Medical Center | Decorah | 101 |
| Cnos PC | Sioux City | 99 |
| Iowa Specialty Hospital- Clarion | Clarion | 98 |
| Pella Regional Health Center | Knoxville | 98 |
| Belmond Community Hospital | Belmond | 92 |
| Spencer Municipal Hospital | Spencer | 92 |
| The Finley Hospital | Dubuque | 84 |
| St Lukes Methodist Hospital | Cedar Rapids | 82 |
| Empowerme Asl LLC | Fort Madison | 80 |
| Delaware County Memorial Hospital | Manchester | 77 |
| Radiology Consultants of Iowa PLC | Cedar Rapids | 73 |
| Primary Health Care Inc | Des Moines | 71 |
| Iowa Orthopaedic Center PC | Waukee | 69 |
| Cass County Memorial Hospital | Atlantic | 68 |
| Unity Healthcare | Muscatine | 67 |
| Mercy Specialty Clinic | Clinton | 65 |
| Associated Anesthesiologists PC | Des Moines | 65 |
| Cogent Healthcare of Iowa PC | Mason City | 61 |
| Fox Rehab PT Ia PLLC | Norwalk | 61 |
| Community Health Care Inc. | Muscatine | 60 |
| Jennie Edmundson Memorial Hospital | Council Bluffs | 57 |
| Fox Rehab OT Ia LLC | Norwalk | 56 |
| Deer Oaks Mental Health Associates PC | Baxter | 55 |
| The Robert Young Center for Community Mental Health | Muscatine | 54 |
| Greater Regional Medical Center | Creston | 54 |
| Shenandoah Medical Center | Shenandoah | 54 |
| Gundersen Regional Clinics, LLC | Decorah | 53 |
| Clarinda Regional Health Center | Clarinda | 51 |
| Evizzit of Iowa Psychiatry PC | West Des Moines | 50 |
| St Anthony Regional Hospital and Nursing Home | Carroll | 50 |
| Shelby County Chris A Myrtue Memorial Hospital | Harlan | 50 |
| Family Health Care of Siouxland PLC | Sioux City | 50 |
| Des Moines River Physicians LLC | Des Moines | 48 |
| Peoples Memorial Hospital | Independence | 48 |
| Wayne County Hospital | Humeston | 47 |
| Jefferson County Hospital | Fairfield | 47 |
| Psychiatric Associates of Iowa, PC | North Liberty | 47 |
| Hegg Memorial Hospital | Rock Valley | 45 |
| Younker Rehabilitation Therapy Services LLC | Ankeny | 44 |
| Orange City Municipal Hospital | Paullina | 44 |
| Waverly Health Center | Waverly | 44 |
| Marengo Memorial Hospital | Marengo | 43 |
| Hy-Vee Health PC | Des Moines | 43 |
| Cedar Valley Medical Specialists PC | Cedar Falls | 43 |
| Clarke County Public Hospital | Osceola | 43 |
| Montgomery County Memorial Hospital | Red Oak | 43 |
| Veterans Memorial Hospital City of Waukon Ia | Waukon | 41 |
| Madison County Memorial Hospital | Winterset | 41 |
| Abbe Center for Community Mental Health Inc | Cedar Rapids | 40 |
| Mercy Medical Center-Centerville | Centerville | 40 |
| Floyd County Memorial Hospital Commission | Charles City | 39 |
| Washington County Hospital | Washington | 39 |
| Metro Geriatric Services | West Des Moines | 39 |
| Linn County Anesthesiologists PC | Cedar Rapids | 39 |
| Wolfe Clinic Inc | Spencer | 39 |
| Linn County Emergency Medicine PC | Hiawatha | 39 |
| Lakes Regional Healthcare | Spirit Lake | 38 |
| Iowa Radiology P C | Des Moines | 38 |
| Floyd Valley Healthcare | Le Mars | 38 |
| Steindler Orthopedic Clinic PLC | Washington | 38 |
| Qv Urgent Care Ia PLLC | Grinnell | 37 |
| Palmer Lutheran Health Center Inc | West Union | 37 |
| Stewart Memorial Community Hospital | Lake City | 37 |
| Iowa Diagnostic Imaging and Procedure Center L C | Des Moines | 36 |
| Des Moines University Osteopathic Medical Center | Des Moines | 36 |
| Sioux Center Health | Sioux Center | 36 |
| Work Systems Rehab PC | Centerville | 35 |
| Vera French Community Mental Health | Davenport | 34 |