| Aetna U. S. Healthcare, Inc. | HMO | Cleveland and Toledo areas | 800/537-9384 | 7D1 | 7D2 | |
| Aetna U. S. Healthcare, Inc. | HMO | Greater Cincinnati area | 800/537-9384 | RD1 | RD2 | |
| Alliance Health Plan | FFS | nationwide | 202/939-6325 | 1R1 | 1R2 | |
| APWU Health Plan | FFS | nationwide | 800/222-2798 | 471 | 472 | |
| Association Benefit Plan | FFS | Specific Groups | 800/634-0069 | 421 | 422 | |
| AultCare HMO | HMO | Stark/ Carroll/ Holmes/ Tuscarawas/ Wayne Co | 330/438-6360 | 3A1 | 3A2 | |
| Blue Cross and Blue Shield Service Benefit Plan-Basic | FFS | nationwide | Local phone # | 111 | 112 | |
| Blue Cross and Blue Shield Service Benefit Plan-Std | FFS | nationwide | Local phone # | 104 | 105 | |
| Foreign Service | FFS | Specific Groups | 202/833-4910 | 401 | 402 | |
| GEHA Benefit Plan-High | FFS | nationwide | 800/821-6136 | 311 | 312 | |
| GEHA Benefit Plan-Std | FFS | nationwide | 800/821-6136 | 314 | 315 | |
| Health Maintenance Plan(HMP) | HMO | Most of Ohio | 800/228-4375 | R51 | R52 | |
| Health Plan Upper OH Valley | HMO | Eastern Ohio | 800/624-6961 | U41 | U42 | |
| HMO Health Ohio | HMO | Northeast Ohio | 800/522-2066 | L41 | L42 | |
| Kaiser Permanente | HMO | Akron/ Cleveland areas | 800/686-7100 | 641 | 642 | |
| Mail Handlers-High | FFS | nationwide | 800/410-7778 | 451 | 452 | |
| Mail Handlers-Std | FFS | nationwide | 800/410-7778 | 454 | 455 | |
| NALC | FFS | nationwide | 888/636-6252 | 321 | 322 | |
| Panama Canal Area | FFS | Specific Groups | 732/222-2229 | 431 | 432 | |
| Paramount Health Care | HMO | Northwest/ North Central Ohio | 800/462-3589 | U21 | U22 | |
| PBP Health Plan-High | FFS | nationwide | 703/683-5585 | 361 | 362 | |
| PBP Health Plan-Std | FFS | nationwide | 703/683-5585 | 364 | 365 | |
| Rural Carrier Benefit Plan | FFS | Specific Groups | 800/638-8432 | 381 | 382 | |
| SAMBA | FFS | Specific Groups | 800/638-6589 | 441 | 442 | |
| Secret Service | FFS | Specific Groups | 800/424-7474 | Y71 | Y72 | |
| SummaCare Health Plan | HMO | Cleveland, Akron areas | 330/996-8415 | 5W1 | 5W2 | |
| SuperMed HMO | HMO | Northeast Ohio | 800/522-2066 | 5M1 | 5M2 | |
| United Health Care of Ohio, Inc. | HMO | Cincinnati/ Dayton/ Springfield | 800/231-2918 | 3U1 | 3U2 | |