| ADENA HEALTH SYSTEM | Organization | CHILLICOTHE |
| BETHESDA CARE EASTGATE | Organization | CINCINNATI |
| BLANCHARD VALLEY MEDICAL PRACTICE LLC | Organization | FINDLAY |
| BSMH EMPLOYER SERVICES LLC | Organization | FAIRFIELD |
| BSMH EMPLOYER SERVICES LLC | Organization | BLUFFTON |
| C.H. HEALTH SERVICES COMPANY | Organization | SPRINGFIELD |
| CENTER FOR OCCUPATIONAL HEALTH, LLC | Organization | WARREN |
| CITRAN OCCUPATIONAL HEALTH, LLC | Organization | FAIRBORN |
| COMMUNITY FIRST HEALTH VENTURES | Organization | CINCINNATI |
| COMPLETE OCCUPATIONAL HEALTH CENTER LLC | Organization | WARREN |
| COSHOCTON OCCUPATIONAL MEDICINE | Organization | COSHOCTON |
| CRYSTALWORKS LTD. | Organization | AKRON |
| DR. A. O. ALLENIUS AND ASSOCIATES, INC. | Organization | COLUMBUS |
| EMH PROFESSIONAL SERVICES | Organization | NORTH RIDGEVILLE |
| FORUM HEALTH SERVICES | Organization | YOUNGSTOWN |
| FORUM HEALTH SERVICES CO. | Organization | HUBBARD |
| GABRIEL SELLA INC | Organization | MARTINS FERRY |
| GENESIS REHAB SERVICES | Organization | CLEVELAND |
| HARNESS HEALTH PARTNERS, LLC | Organization | CINCINNATI |
| HEALTH PARTNERS LIMITED | Organization | MARYSVILLE |
| HEALTHCARE ONLINE AND MEDICAL EXCHANGE, INC. | Organization | COLUMBUS |
| INVO HEALTHCARE | Organization | AKRON |
| MEDWORK LLC | Organization | DAYTON |
| MOUNT CARMEL HEALTH SYSTEM | Organization | DELAWARE |
| NORTH PARK SENIOR CARE LLC | Organization | FAIRVIEW PARK |
| OCCUCENTERS EAST SIDE | Organization | CLEVELAND |
| OCCUPATIONAL HEALTH CENTERS OF OHIO PA, CO | Organization | BLANCHESTER |
| OCCUPATIONAL HEALTH CENTERS OF OHIO PA, CO | Organization | COLUMBUS |
| OCCUPATIONAL HEALTH CENTERS OF OHIO PA, CO | Organization | GROVEPORT |
| OCCUPATIONAL HEALTH CENTERS OF OHIO, P.A., CO. | Organization | CLEVELAND |
| OCCUPATIONAL HEALTH CENTERS OF OHIO, P.A., CO. | Organization | COLUMBUS |
| OCCUPATIONAL HEALTH CENTERS OF OHIO, P.A., CO. | Organization | HUBER HEIGHTS |
| OCCUPATIONAL HEALTH CENTERS OF OHIO, P.A., CO. | Organization | OAKWOOD VILLAGE |
| OCCUPATIONAL HEALTH CENTERS OF OHIO, P.A., CO. | Organization | CINCINNATI |
| OCCUPATIONAL HEALTH CENTERS OF OHIO, P.A., CO. | Organization | DAYTON |
| OCCUPATIONAL HEALTH CENTERS OF OHIO, P.A., CO. | Organization | AKRON |
| OCCUPATIONAL HEALTH CENTERS OF OHIO, P.A., CO. | Organization | WILLOUGHBY |
| OCCUPATIONAL HEALTH CENTERS OF OHIO, P.A., CO. | Organization | CANTON |
| OCCUPATIONAL HEALTH CENTERS OF OHIO, P.A., CO. | Organization | CINCINNATI |
| OCCUPATIONAL HEALTH CENTERS OF OHIO, P.A., CO. | Organization | CINCINNATI |
| OCCUPATIONAL HEALTH CENTERS OF OHIO, P.A., CO. | Organization | CLEVELAND |
| OCCUPATIONAL HEALTH CENTERS OF OHIO, PA, CO | Organization | HUBER HEIGHTS |
| OCCUPATIONAL HEALTH CENTERS OF OHIO, PA, CO | Organization | AKRON |
| OCCUPATIONAL HEALTH CENTERS OF OHIO, PA, CO | Organization | OREGON |
| OCCUPATIONAL HEALTH CENTERS OF OHIO, PA, CO | Organization | VANDALIA |
| OCCUPATIONAL HEALTH CENTERS OF OHIO, PA, CO | Organization | FRANKLIN |
| OCCUPATIONAL HEALTH CENTERS OF OHIO, PA, CO | Organization | DAYTON |
| OCCUPATIONAL HEALTH CENTERS OF OHIO, PA, CO | Organization | HOLLAND |
| OCCUPATIONAL MEDICINE ASSOCIATES OF WAYNE COUNTY, INC | Organization | WOOSTER |
| OCCUPATIONAL MEDICINE OF NORTHWEST OHIO | Organization | TIFFIN |
| OHIO INJURY DOCTORS | Organization | WESTERVILLE |
| OHIOHEALTH CORPORATION | Organization | COLUMBUS |
| ONWARD HEALTH CARE | Organization | WAPAKONETA |
| PREMIER COMMUNITY HEALTH | Organization | MIDDLETOWN |
| PREMIER COMMUNITY HEALTH | Organization | LEBANON |
| PREMIER COMMUNITY HEALTH | Organization | TROY |
| PREMIER COMMUNITY HEALTH | Organization | GREENVILLE |
| PREMIER COMMUNITY HEALTH | Organization | MONROE |
| PREMIER COMMUNITY HEALTH | Organization | DAYTON |
| PREMIER INJURY MEDICAL SERVICES, LLC | Organization | COLUMBUS |