| Alliance Health Plan | FFS | nationwide | 202/939-6325 | 1R1 | 1R2 | |
| Amcare Health Plans | HMO | Austin/ San Antonio/ Dallas/ Fort Worth Areas | 800/782-8373 | ZG1 | ZG2 | |
| Amcare Health Plans | HMO | Houston/ El Paso areas | 800/782-8373 | 2V1 | 2V2 | |
| APWU Health Plan | FFS | nationwide | 800/222-2798 | 471 | 472 | |
| Association Benefit Plan | FFS | Specific Groups | 800/634-0069 | 421 | 422 | |
| 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 | |
| FIRSTCARE | HMO | Waco area | 800/884-4901 | 6U1 | 6U2 | |
| FIRSTCARE | HMO | West Texas | 800/884-4901 | CK1 | CK2 | |
| 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 | |
| HMO Blue Texas | HMO | Austin/ C.Christi/ S.Antonio/ Victoria/ Houston | 800/833-5318 | YM1 | YM2 | |
| HMO Blue Texas | HMO | Dallas/ Ft. Worth/ East & West Texas | 800/486-3040 | YX1 | YX2 | |
| Humana Health Plan of Texas | HMO | San Antonio area | 888/393-6765 | UR1 | UR2 | |
| Mail Handlers-High | FFS | nationwide | 800/410-7778 | 451 | 452 | |
| Mail Handlers-Std | FFS | nationwide | 800/410-7778 | 454 | 455 | |
| Mercy Health Plans/Premier | POS | Webb/ Zapata/ Duval/ Jim Hogg Counties | 800/617-3433 | HM1 | HM2 | |
| NALC | FFS | nationwide | 888/636-6252 | 321 | 322 | |
| PacifiCare Health Plans | HMO | San Antonio/ Dallas/ Ft Worth | 800/531-3341 | GF1 | GF2 | |
| Panama Canal Area | FFS | Specific Groups | 732/222-2229 | 431 | 432 | |
| 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 | |