| Prefix | Plan Name | |
|---|---|---|
| T2A | BCBS of Western New York | |
| T2B | Blue Cross Blue Shield of Illinois | |
| T2D | Blue Cross Blue Shield of Texas | |
| T2E | Blue Cross Blue Shield of Texas | |
| T2F | Blue Cross Blue Shield of Texas | |
| T2G | Blue Cross Blue Shield of Texas | |
| T2H | Blue Cross Blue Shield of Illinois | |
| T2J | Blue Cross Blue Shield of Texas | |
| T2K | Blue Cross Blue Shield of Texas | |
| T2L | Regence Blue Cross Blue Shield of Oregon | |
| T2M | Anthem Blue Cross of California | |
| T2N | Anthem Blue Cross of Virginia | |
| T2Q | Blue Cross of California | |
| T2R | Blue Cross Blue Shield of Illinois | |
| T2V | Capital Blue Cross | |
| T2W | Blue Cross Blue Shield of Illinois | |
| T2X | Blue Cross Blue Shield of Illinois | |
| T2Y | Blue Cross Blue Shield of North Dakota | |
| T2Z | Blue Cross Blue Shield of Illinois | |
| T3A | Regence Blue Cross Blue Shield of Oregon | |
| T3B | Highmark BCBS of Pennsylvania | |
| T3C | Regence Blue Cross Blue Shield of Oregon | |
| T3D | Highmark BCBS of Pennsylvania | |
| T3H | Blue Cross Blue Shield of Illinois | |
| T3M | Blue Cross of California | |
| T3P | Blue Cross Blue Shield of Minnesota | |
| T3R | Blue Cross Blue Shield of Texas | |
| T3T | Blue Cross Blue Shield of Minnesota | |
| T3U | Anthem BCBS of Missouri | |
| T4A | Empire BCBS of New York | |
| T4B | Empire BCBS of New York | |
| T4C | Empire BCBS of New York | |
| T4D | Empire BCBS of New York | |
| T4E | Empire BCBS of New York | |
| T4F | Empire BCBS of New York | |
| T4H | Blue Cross Blue Shield of Illinois | |
| T4J | Empire BCBS of New York | |
| T4K | Empire BCBS of New York | |
| T4L | Empire BCBS of New York | |
| T4N | Empire BCBS of New York | |
| T4O | Anthem BCBS of Colorado | |
| T4P | Blue Cross Blue Shield of Illinois | |
| T4R | Blue Cross Blue Shield of Texas | |
| T4T | Blue Cross Blue Shield of Massachusetts | |
| T4U | Empire BCBS of New York | |
| T4V | Empire BCBS of New York | |
| T5A | Blue Cross of California | |
| T5B | Anthem BCBS of Ohio | |
| T5F | Anthem BCBS of Virginia | |
| T5G | Anthem BCBS of Indiana | |
| T5H | Blue Cross Blue Shield of Illinois | |
| T5N | Anthem BCBS of Georgia | |
| T5O | Anthem BCBS of Ohio | |
| T5P | Regence Blue Cross Blue Shield of Oregon | |
| T5R | Blue Cross Blue Shield of Texas | |
| T5T | Regence Blue Cross Blue Shield of Oregon | |
| T6A | Empire BCBS of New York | |
| T6G | Regence Blue Cross Blue Shield of Oregon | |
| T6H | Blue Cross Blue Shield of Illinois | |
| T7H | Blue Cross Blue Shield of Illinois | |
| T8H | Blue Cross Blue Shield of Illinois | |
| T8R | Premera Blue Cross | |
| T8R | Premera Blue Cross | |
| T9H | Blue Cross Blue Shield of Illinois | |
| TAA | Highmark BCBS | |
| TAB | Anthem Blue Cross of California | |
| TAC | Blue Cross of Idaho | |
| TAD | Unassigned Prefix | |
| TAE | Anthem BCBS of Colorado | |
| TAF | BCBS of Illinois | |
| TAG | Anthem BCBS of Ohio | |
| TAH | Premera Blue Cross | |
| TAI | Anthem BCBS of Ohio | |
| TAJ | BCBS of Illinois | |
| TAK | Unassigned Prefix | |
| TAL | BCBS of Minnesota | |
| TAM | BCBS of Alabama | |
| TAN | Independence Blue Cross | |
| TAO | Unassigned Prefix | |
| TAP | Premera Blue Cross | |
| TAQ | BCBS of Western New York | |
| TAR | Unassigned Prefix | |
| TAS | Anthem BCBS of Wisconsin | |
| TAT | Premera Blue Cross | |
| TAU | BCBS of Massachusetts | |
| TAV | BCBS of South Carolina | |
| TAW | Anthem BCBS of Hampshire | |
| TAX | BCBS of Georgia | |
| TAY | BCBS of North Carolina | |
| TAZ | BCBS of Georgia | |
| TBA | BCBS of Michigan | |
| TBB | Anthem BCBS of Wisconsin | |
| TBC | BCBS of Texas | |
| TBD | BCBS of Tennessee | |
| TBE | BCBS of Illinois | |
| TBF | Anthem BCBS of Missouri | |
| TBG | Horizon BCBS of New Jersey | |
| TBH | Anthem BCBS of Missouri | |
| TBI | Anthem BCBS of Virginia | |
| TBJ | BCBS of Massachusetts |
| TBK | BCBS of Illinois | |
| TBL | BCBS of Illinois | |
| TBM | Highmark BCBS | |
| TBN | BCBS of Minnesota | |
| TBO | Anthem BCBS of Missouri | |
| TBP | BCBS of Michigan | |
| TBQ | Anthem BCBS of Wisconsin | |
| TBR | BCBS of Michigan | |
| TBS | BCBS of Kansas City | |
| TBT | Anthem Blue Cross of California | |
| TBU | Unassigned Prefix | |
| TBV | BCBS of Minnesota | |
| TBW | Anthem BCBS of Virginia | |
| TBX | BCBS of Michigan | |
| TBY | BCBS of Florida | |
| TBZ | BCBS of Massachusetts | |
| TCA | BCBS of Alabama | |
| TCB | Anthem BCBS of Ohio | |
| TCC | BCBS of Illinois | |
| TCD | Anthem BCBS of Virginia | |
| TCE | Anthem Blue Cross of California | |
| TCF | BCBS of South Carolina | |
| TCG | BCBS of Texas | |
| TCH | Anthem BCBS of Ohio | |
| TCI | BCBS of Massachusetts | |
| TCJ | BCBS of Massachusetts | |
| TCK | BCBS of Massachusetts | |
| TCL | Unassigned Prefix | |
| TCM | BCBS of Michigan | |
| TCN | Unassigned Prefix | |
| TCO | BCBS of Alabama | |
| TCP | BCBS of Texas | |
| TCQ | Blue Shield of California | |
| TCR | BCBS of Texas | |
| TCS | Carefirst Administrators | |
| TCT | Anthem BCBS of Ohio | |
| TCU | Unassigned Prefix | |
| TCV | BCBS of South Carolina | |
| TCW | Anthem Blue Cross of California | |
| TCX | Blue Shield of California | |
| TCY | BCBS of Georgia | |
| TCZ | BCBS of Nebraska | |
| TDA | BCBS of Illinois | |
| TDB | Blue Cross of Idaho | |
| TDC | Highmark BCBS | |
| TDD | Unassigned Prefix | |
| TDE | BCBS of Texas | |
| TDF | Unassigned Prefix | |
| TDG | Anthem Blue Cross of California | |
| TDH | Unassigned Prefix | |
| TDI | BCBS of Texas | |
| TDJ | BCBS of Michigan | |
| TDK | BCBS of North Carolina | |
| TDL | Highmark BCBS | |
| TDM | Highmark BCBS | |
| TDN | Anthem BCBS of Ohio | |
| TDO | Anthem BCBS of Virginia | |
| TDP | Anthem BCBS of Wisconsin | |
| TDQ | BCBS of Michigan | |
| TDR | Blue Cross of Idaho | |
| TDS | BCBS of Georgia | |
| TDT | Premera Blue Cross | |
| TDU | BCBS of Michigan | |
| TDV | BCBS of Michigan | |
| TDW | Anthem BCBS of Georgia | |
| TDX | Blue Shield of California | |
| TDY | Independence Blue Cross | |
| TDZ | Anthem BCBS of Georgia | |
| TEA | BCBS of Illinois | |
| TEB | Horizon BCBS of New Jersey | |
| TEC | BCBS of Texas | |
| TED | Anthem BCBS of Colorado | |
| TEE | Unassigned Prefix | |
| TEF | Anthem Blue Cross of California | |
| TEG | Carefirst BCBS | |
| TEH | Blue Shield of California | |
| TEI | Anthem BCBS of Ohio | |
| TEJ | Blue Shield of Northeastern New York | |
| TEK | BCBS of Illinois | |
| TEL | Unassigned Prefix | |
| TEM | Blue Shield of California | |
| TEN | BCBS of Illinois | |
| TEO | Unassigned Prefix | |
| TEP | BCBS of Illinois | |
| TEQ | BCBS of Alabama | |
| TER | Carefirst BCBS | |
| TES | Blue Shield of California | |
| TET | BCBS of South Carolina | |
| TEU | Blue Shield of California | |
| TEV | BCBS of Michigan | |
| TEW | BCBS of Illinois | |
| TEX | BCBS of Texas | |
| TEY | Anthem Blue Cross of California | |
| TEZ | BCBS of Texas | |
| TFA | Unassigned Prefix | |
| TFB | Regence Blue Cross Blue Shield of Utah | |
| TFC | Regence Blue Shield of Idaho | |
| TFD | BCBS of Illinois | |
| TFE | Independence Blue Cross | |
| TFF | Anthem BCBS of Ohio |
| TFG | Carefirst BCBS | |
| TFH | BCBS of Tennessee | |
| TFI | Blue Cross of Idaho | |
| TFJ | Anthem BCBS of Connecticut | |
| TFK | Unassigned Prefix | |
| TFL | BCBS of Minnesota | |
| TFM | BCBS of Minnesota | |
| TFN | Unassigned Prefix | |
| TFO | Blue Shield of California | |
| TFP | Carefirst Administrators | |
| TFQ | Unassigned Prefix | |
| TFR | BCBS of Alabama | |
| TFS | BCBS of Georgia | |
| TFT | Unassigned Prefix | |
| TFU | Carefirst BCBS | |
| TFV | Anthem BCBS of Ohio | |
| TFW | Anthem BCBS of Georgia | |
| TFX | Highmark BCBS | |
| TFY | BCBS of Texas | |
| TFZ | BCBS of Illinois | |
| TGA | Empire BCBS of New York | |
| TGB | BCBS of Texas | |
| TGC | Anthem BCBS of Ohio | |
| TGD | BCBS of Western New York | |
| TGE | BCBS of Alabama | |
| TGF | BCBS of Texas | |
| TGG | Anthem Blue Cross of California | |
| TGH | BCBS of Illinois | |
| TGI | BCBS of Western New York | |
| TGJ | Wellmark BCBS | |
| TGK | Blue Shield of California | |
| TGL | BCBS of Arizona | |
| TGM | BCBS of Alabama | |
| TGN | BCBS of Michigan | |
| TGO | Regence BCBS | |
| TGP | Unassigned Prefix | |
| TGQ | Anthem BCBS of Wisconsin | |
| TGR | BCBS of Texas | |
| TGS | BCBS of Minnesota | |
| TGT | Unassigned Prefix | |
| TGU | Unassigned Prefix | |
| TGV | Blue Shield of California | |
| TGW | Horizon BCBS of New Jersey | |
| TGX | Blue Shield of California | |
| TGY | Unassigned Prefix | |
| TGZ | Anthem BCBS of Colorado | |
| THA | Anthem BCBS of Kentucky | |
| THB | Carefirst Administrators | |
| THC | Carefirst BCBS | |
| THD | Wellmark BCBS | |
| THE | Carefirst BCBS | |
| THF | Anthem Blue Cross of California | |
| THG | BCBS of Alabama | |
| THH | Carefirst BCBS | |
| THI | Unassigned Prefix | |
| THJ | BCBS of Kansas City | |
| THK | Carefirst BCBS | |
| THL | Carefirst BCBS | |
| THM | BCBS of Florida | |
| THN | Wellmark BCBS | |
| THO | Blue Shield of California | |
| THP | Anthem BCBS of Virginia | |
| THQ | BCBS of Florida | |
| THR | Regence BCBS | |
| THS | Independence Blue Cross | |
| THT | BCBS of North Carolina | |
| THU | Anthem Blue Cross of California | |
| THV | BCBS of Alabama | |
| THW | Blue Shield of California | |
| THX | BCBS of Tennessee | |
| THY | Anthem BCBS of Virginia | |
| THZ | BCBS of Minnesota | |
| TIA | Blue Shield of California | |
| TIB | Carefirst BCBS | |
| TIC | Independence Blue Cross | |
| TID | BCBS of Western New York | |
| TIE | BCBS of Michigan | |
| TIF | BCBS of Massachusetts | |
| TIG | BCBS of Nebraska | |
| TIH | Unassigned Prefix | |
| TII | Anthem BCBS of Georgia | |
| TIJ | Unassigned Prefix | |
| TIK | Independence Blue Cross | |
| TIL | BCBS of Alabama | |
| TIM | Regence Blue Cross Blue Shield of Oregon | |
| TIN | BCBS of South Carolina | |
| TIO | Anthem BCBS of Ohio | |
| TIP | Anthem BCBS of Virginia | |
| TIQ | BCBS of Massachusetts | |
| TIR | Anthem BCBS of Virginia | |
| TIS | BCBS of Georgia | |
| TIT | Unassigned Prefix | |
| TIU | BCBS of Michigan | |
| TIV | Regence BCBS | |
| TIW | BCBS of Illinois | |
| TIX | Anthem BCBS of Virginia | |
| TIY | BCBS of Michigan | |
| TIZ | Blue Shield of California | |
| TJA | Anthem BCBS of Virginia | |
| TJB | BCBS of Texas |
| TJC | BCBS of Massachusetts | |
| TJD | BCBS of Michigan | |
| TJE | Carefirst BCBS | |
| TJF | BCBS of Texas | |
| TJG | Premera Blue Cross | |
| TJH | Anthem BCBS of Ohio | |
| TJI | Carefirst BCBS | |
| TJJ | BCBS of Massachusetts | |
| TJK | BCBS of Texas | |
| TJL | Unassigned Prefix | |
| TJM | Unassigned Prefix | |
| TJN | BCBS of Alabama | |
| TJO | Unassigned Prefix | |
| TJP | BCBS of Michigan | |
| TJQ | Blue Shield of Northeastern New York | |
| TJR | BCBS of Nebraska | |
| TJS | Anthem Blue Cross of California | |
| TJT | Anthem BCBS of Virginia | |
| TJU | Horizon BCBS of New Jersey | |
| TJV | Blue Shield of California | |
| TJW | BCBS of Massachusetts | |
| TJX | BCBS of Massachusetts | |
| TJY | BCBS of Texas | |
| TJZ | BCBS of Illinois | |
| TKA | BCBS of Michigan | |
| TKB | BCBS of Mississippi | |
| TKC | Anthem BCBS of Ohio | |
| TKD | Premera Blue Cross | |
| TKE | BCBS of Illinois | |
| TKF | Regence BCBS | |
| TKG | BCBS of Illinois | |
| TKH | BCBS of Illinois | |
| TKI | Anthem BCBS of Ohio | |
| TKJ | Unassigned Prefix | |
| TKK | BCBS of Illinois | |
| TKL | Carefirst BCBS | |
| TKM | BCBS of Illinois | |
| TKN | BCBS of Illinois | |
| TKO | BCBS of Rhose Island | |
| TKP | BCBS of Massachusetts | |
| TKQ | BCBS of Georgia | |
| TKR | BCBS of Georgia | |
| TKS | BCBS of Illinois | |
| TKT | BCBS of Texas | |
| TKU | Empire BCBS of New York | |
| TKV | Anthem BCBS of Virginia | |
| TKW | BCBS of Michigan | |
| TKX | BCBS of Texas | |
| TKY | BCBS of Michigan | |
| TKZ | BCBS of Michigan | |
| TLA | Horizon BCBS of New Jersey | |
| TLB | Carefirst BCBS | |
| TLC | Unassigned Prefix | |
| TLD | BCBS of Massachusetts | |
| TLE | BCBS of Illinois | |
| TLF | BCBS of North Carolina | |
| TLG | BCBS of Minnesota | |
| TLH | Horizon BCBS of New Jersey | |
| TLI | BCBS of Massachusetts | |
| TLJ | BCBS of Alabama | |
| TLK | BCBS of Michigan | |
| TLL | Anthem Blue Cross of California | |
| TLM | BCBS of Alabama | |
| TLN | BCBS of Illinois | |
| TLO | BCBS of Illinois | |
| TLP | Anthem BCBS of Connecticut | |
| TLQ | Anthem BCBS of Ohio | |
| TLR | BCBS of Illinois | |
| TLS | BCBS of Illinois | |
| TLT | BCBS of Illinois | |
| TLU | BCBS of Illinois | |
| TLV | BCBS of Rhose Island | |
| TLW | BCBS of Western New York | |
| TLX | BCBS of Illinois | |
| TLY | BCBS of Western New York | |
| TLZ | Highmark BCBS | |
| TMA | BCBS of Alabama | |
| TMB | Independence Blue Cross | |
| TMC | Anthem BCBS of Colorado | |
| TMD | BCBS of Texas | |
| TME | Blue Cross of Idaho | |
| TMF | Wellmark BCBS | |
| TMG | BCBS of Alabama | |
| TMH | BCBS of Michigan | |
| TMI | BCBS of Massachusetts | |
| TMJ | BCBS of Illinois | |
| TMK | BCBS of Texas | |
| TML | BCBS of Illinois | |
| TMM | BCBS of Texas | |
| TMN | Anthem Blue Cross of California | |
| TMO | BCBS of North Dakota | |
| TMP | Premera Blue Cross | |
| TMQ | Independence Blue Cross | |
| TMR | Anthem BCBS of Kentucky | |
| TMS | BCBS of Illinois | |
| TMT | Blue Shield of California | |
| TMU | Horizon BCBS of New Jersey | |
| TMV | BCBS of Illinois | |
| TMW | Independence Blue Cross | |
| TMX | BCBS of Alabama |
| TMY | Regence Blue Cross Blue Shield of Utah | |
| TMZ | BCBS of Arizona | |
| TNA | BCBS of South Carolina | |
| TNB | BCBS of Minnesota | |
| TNC | Unassigned Prefix | |
| TND | Carefirst Administrators | |
| TNE | Wellmark BCBS | |
| TNF | Anthem BCBS of Ohio | |
| TNG | Regence Blue Cross Blue Shield of Oregon | |
| TNH | Unassigned Prefix | |
| TNI | BCBS of Michigan | |
| TNJ | Anthem BCBS of Nevada | |
| TNK | Anthem BCBS of Wisconsin | |
| TNL | BCBS of Minnesota | |
| TNM | BCBS of Georgia | |
| TNN | BCBS of Arkansas | |
| TNO | BCBS of North Carolina | |
| TNP | Anthem Blue Cross of California | |
| TNQ | Anthem BCBS of Ohio | |
| TNR | BCBS of Massachusetts | |
| TNS | Excellus BCBS of New York | |
| TNT | BCBS of North Dakota | |
| TNU | Independence Blue Cross | |
| TNV | Empire BCBS of New York | |
| TNW | Wellmark BCBS | |
| TNX | Anthem Blue Cross of California | |
| TNY | Excellus BCBS of New York | |
| TNZ | BCBS of Tennessee | |
| TOA | Anthem BCBS of Ohio | |
| TOB | Carefirst BCBS | |
| TOC | Unassigned Prefix | |
| TOD | BCBS of Alabama | |
| TOE | BCBS of Kansas | |
| TOF | Unassigned Prefix | |
| TOG | Regence BCBS of Washington | |
| TOH | Anthem BCBS of Ohio | |
| TOI | Unassigned Prefix | |
| TOJ | Carefirst BCBS | |
| TOK | BCBS of North Carolina | |
| TOL | BCBS of Minnesota | |
| TOM | Wellmark BCBS | |
| TON | Independence Blue Cross | |
| TOO | Blue Shield of California | |
| TOP | Unassigned Prefix | |
| TOQ | BCBS of Minnesota | |
| TOR | Unassigned Prefix | |
| TOS | BCBS of Illinois | |
| TOT | Anthem Blue Cross of California | |
| TOU | BCBS of Michigan | |
| TOV | BCBS of Michigan | |
| TOW | BCBS of Michigan | |
| TOX | BCBS of Minnesota | |
| TOY | BCBS of Michigan | |
| TOZ | Unassigned Prefix | |
| TPA | Unassigned Prefix | |
| TPB | BCBS of Michigan | |
| TPC | Wellmark BCBS | |
| TPD | Carefirst BCBS | |
| TPE | Anthem BCBS of Kentucky | |
| TPF | Anthem Blue Cross of California | |
| TPG | BCBS of Rhose Island | |
| TPH | Wellmark BCBS | |
| TPI | BCBS of Illinois | |
| TPJ | Unassigned Prefix | |
| TPK | BCBS of Illinois | |
| TPL | Anthem BCBS of Kentucky | |
| TPM | BCBS of Michigan | |
| TPN | Anthem BCBS of Ohio | |
| TPO | BCBS of Western New York | |
| TPP | Empire BCBS of New York | |
| TPQ | Wellmark BCBS | |
| TPR | Wellmark BCBS | |
| TPS | Anthem Blue Cross of California | |
| TPT | Excellus BCBS of New York | |
| TPU | Anthem BCBS of Virginia | |
| TPV | BCBS of Illinois | |
| TPW | Regence BCBS | |
| TPX | Anthem BCBS of Ohio | |
| TPY | Independence Blue Cross | |
| TPZ | Blue Shield of California | |
| TQA | Premera Blue Cross | |
| TQB | Regence BCBS of Washington | |
| TQC | BCBS of Minnesota | |
| TQD | BCBS of Michigan | |
| TQE | Anthem BCBS of Indiana | |
| TQF | BCBS of Michigan | |
| TQG | Highmark BCBS | |
| TQH | BCBS of Massachusetts | |
| TQI | Wellmark BCBS | |
| TQJ | Independence Blue Cross | |
| TQK | BCBS of Michigan | |
| TQL | Horizon BCBS of New Jersey | |
| TQM | BCBS of Minnesota | |
| TQN | Anthem BCBS of Ohio | |
| TQO | BCBS of North Dakota | |
| TQP | Anthem BCBS of Ohio | |
| TQQ | BCBS of Minnesota | |
| TQR | Regence Blue Cross Blue Shield of Utah | |
| TQS | Anthem BCBS of Ohio | |
| TQT | Horizon BCBS of New Jersey |
| TQU | BCBS of Minnesota | |
| TQV | Unassigned Prefix | |
| TQW | Horizon BCBS of New Jersey | |
| TQX | BCBS of Georgia | |
| TQY | BCBS of Alabama | |
| TQZ | BCBS of Massachusetts | |
| TRA | BCBS of Illinois | |
| TRB | BCBS of Illinois | |
| TRC | BCBS of Illinois | |
| TRD | Anthem BCBS of Wisconsin | |
| TRE | BCBS of Arizona | |
| TRF | BCBS of Michigan | |
| TRG | Premera Blue Cross | |
| TRH | BCBS of Tennessee | |
| TRI | Capital Blue Cross | |
| TRJ | Anthem Blue Cross of California | |
| TRK | BCBS of Illinois | |
| TRL | BCBS of Massachusetts | |
| TRM | Blue Shield of California | |
| TRN | Anthem BCBS of Connecticut | |
| TRO | Carefirst Administrators | |
| TRP | BCBS of Minnesota | |
| TRQ | Independence Blue Cross | |
| TRR | BCBS of Tennessee | |
| TRS | BCBS of Kansas City | |
| TRT | BCBS of Alabama | |
| TRU | Blue Cross of Idaho | |
| TRV | BCBS of Tennessee | |
| TRW | Unassigned Prefix | |
| TRX | Independence Blue Cross | |
| TRY | Unassigned Prefix | |
| TRZ | Highmark BCBS | |
| TSA | BCBS of Texas | |
| TSB | BCBS of Minnesota | |
| TSC | Wellmark BCBS | |
| TSD | Wellmark BCBS | |
| TSE | Anthem Blue Cross of California | |
| TSF | Unassigned Prefix | |
| TSG | Wellmark BCBS | |
| TSH | Blue Cross of Idaho | |
| TSI | BCBS of Illinois | |
| TSJ | Anthem BCBS of Connecticut | |
| TSK | Carefirst BCBS | |
| TSL | BCBS of Nebraska | |
| TSM | Highmark BCBS | |
| TSN | Anthem Blue Cross of California | |
| TSO | Unassigned Prefix | |
| TSP | Wellmark BCBS | |
| TSQ | BCBS of Minnesota | |
| TSR | Highmark BCBS | |
| TSS | Unassigned Prefix | |
| TST | Premera Blue Cross | |
| TSU | Premera Blue Cross | |
| TSV | Wellmark BCBS | |
| TSW | Anthem Blue Cross of California | |
| TSX | Anthem BCBS of Ohio | |
| TSY | Anthem Blue Cross of California | |
| TSZ | BCBS of Texas | |
| TTA | Blue Cross of Idaho | |
| TTB | BCBS of Texas | |
| TTC | Anthem BCBS of Ohio | |
| TTD | Anthem Blue Cross of California | |
| TTE | Wellmark BCBS | |
| TTF | BCBS of Texas | |
| TTG | Anthem BCBS of Ohio | |
| TTH | Carefirst BCBS | |
| TTI | BCBS of Alabama | |
| TTJ | BCBS of Florida | |
| TTK | BCBS of Arizona | |
| TTL | Anthem BCBS of Ohio | |
| TTM | Anthem BCBS of Ohio | |
| TTN | Anthem BCBS of Ohio | |
| TTO | Unassigned Prefix | |
| TTP | Carefirst BCBS | |
| TTQ | Anthem Blue Cross of California | |
| TTR | BCBS of Michigan | |
| TTS | Anthem BCBS of Virginia | |
| TTT | Unassigned Prefix | |
| TTU | BCBS of Mississippi | |
| TTV | Wellmark BCBS | |
| TTW | BCBS of Georgia | |
| TTX | BCBS of Massachusetts | |
| TTY | Anthem BCBS of Ohio | |
| TTZ | Anthem BCBS of Ohio | |
| TUA | Capital Blue Cross | |
| TUB | BCBS of Illinois | |
| TUC | Anthem BCBS of Ohio | |
| TUD | Unassigned Prefix | |
| TUE | Highmark BCBS | |
| TUF | BCBS of Illinois | |
| TUG | Premera Blue Cross | |
| TUH | Carefirst BCBS | |
| TUI | Regence BCBS | |
| TUJ | Carefirst BCBS | |
| TUK | BCBS of Illinois | |
| TUL | Horizon BCBS of New Jersey | |
| TUM | Anthem BCBS of Ohio | |
| TUN | BCBS of Alabama | |
| TUO | BCBS of Tennessee | |
| TUP | Anthem BCBS of Wisconsin |
| TUQ | Unassigned Prefix | |
| TUR | Empire BCBS of New York | |
| TUS | BCBS of Texas | |
| TUT | BCBS of Illinois | |
| TUU | Horizon BCBS of New Jersey | |
| TUV | Horizon BCBS of New Jersey | |
| TUW | Unassigned Prefix | |
| TUX | BCBS of Illinois | |
| TUY | BCBS of Michigan | |
| TUZ | Anthem BCBS of Ohio | |
| TVA | BCBS of Tennessee | |
| TVB | Unassigned Prefix | |
| TVC | BCBS of Massachusetts | |
| TVD | BCBS of Nebraska | |
| TVE | Wellmark BCBS | |
| TVF | Regence BCBS of Washington | |
| TVG | Anthem BCBS of Missouri | |
| TVH | BCBS of Illinois | |
| TVI | BCBS of Tennessee | |
| TVJ | BCBS of Minnesota | |
| TVK | Carefirst Administrators | |
| TVL | Anthem BCBS of Virginia | |
| TVM | Anthem BCBS of Virginia | |
| TVN | BCBS of Georgia | |
| TVO | BCBS of Tennessee | |
| TVP | Blue Shield of California | |
| TVQ | Anthem BCBS of Ohio | |
| TVR | Regence Blue Shield of Washington | |
| TVS | BCBS of Tennessee | |
| TVT | BCBS of Minnesota | |
| TVU | BCBS of Michigan | |
| TVV | Horizon BCBS of New Jersey | |
| TVW | BCBS of Minnesota | |
| TVX | Unassigned Prefix | |
| TVY | Wellmark BCBS | |
| TVZ | Regence BCBS | |
| TWA | BCBS of Georgia | |
| TWB | BCBS of Minnesota | |
| TWC | BCBS of Illinois | |
| TWD | Highmark BCBS | |
| TWE | BCBS of Massachusetts | |
| TWF | Horizon BCBS of New Jersey | |
| TWG | BCBS of North Carolina | |
| TWH | Blue Shield of California | |
| TWI | Regence BCBS of Washington | |
| TWJ | BCBS of Western New York | |
| TWK | Anthem BCBS of Ohio | |
| TWL | BCBS of Alabama | |
| TWM | Anthem Blue Cross of California | |
| TWN | Regence Blue Cross Blue Shield of Oregon | |
| TWO | Independence Blue Cross | |
| TWP | Horizon BCBS of New Jersey | |
| TWQ | Empire BCBS of New York | |
| TWR | Anthem Blue Cross of California | |
| TWS | Independence Blue Cross | |
| TWT | Carefirst BCBS | |
| TWU | Anthem BCBS of Ohio | |
| TWV | BCBS of Illinois | |
| TWW | Anthem BCBS of Ohio | |
| TWX | BCBS of Texas | |
| TWY | BCBS of Western New York | |
| TWZ | Regence BCBS | |
| TXA | BCBS of Illinois | |
| TXB | BCBS of Illinois | |
| TXC | BCBS of Alabama | |
| TXD | BCBS of Texas | |
| TXE | Unassigned Prefix | |
| TXF | BCBS of Illinois | |
| TXG | BCBS of Tennessee | |
| TXH | Anthem BCBS of Maine | |
| TXI | Unassigned Prefix | |
| TXJ | Anthem BCBS of Nevada | |
| TXK | Unassigned Prefix | |
| TXL | BCBS of Illinois | |
| TXM | Anthem BCBS of Ohio | |
| TXN | BCBS of Michigan | |
| TXO | Blue Shield of California | |
| TXP | Premera Blue Cross | |
| TXQ | Blue Shield of California | |
| TXR | BCBS of Texas | |
| TXS | BCBS of Texas | |
| TXT | BCBS of Massachusetts | |
| TXU | BCBS of Western New York | |
| TXV | BCBS of Tennessee | |
| TXW | BCBS of Texas | |
| TXX | BCBS of Massachusetts | |
| TXY | Unassigned Prefix | |
| TXZ | BCBS of Tennessee | |
| TYA | Premera Blue Cross | |
| TYB | Blue Shield of California | |
| TYC | Anthem Blue Cross of California | |
| TYD | Unassigned Prefix | |
| TYE | Unassigned Prefix | |
| TYF | Anthem BCBS of Ohio | |
| TYG | BCBS of Arkansas Blue Advantage | |
| TYH | Unassigned Prefix | |
| TYI | Wellmark BCBS | |
| TYJ | Anthem BCBS of Wisconsin | |
| TYK | Anthem BCBS of Ohio | |
| TYL | BCBS of Texas |
| TYM | BCBS of South Carolina | |
| TYN | Horizon BCBS of New Jersey | |
| TYO | BCBS of Western New York | |
| TYP | Wellmark BCBS | |
| TYQ | Carefirst BCBS | |
| TYR | Premera Blue Cross | |
| TYS | Unassigned Prefix | |
| TYT | BCBS of Illinois | |
| TYU | Carefirst Administrators | |
| TYV | Anthem BCBS of Wisconsin | |
| TYW | BCBS of Arizona | |
| TYX | Anthem BCBS of Ohio | |
| TYY | BCBS of Texas | |
| TYZ | BCBS of Arkansas – Health Advantage | |
| TZA | BCBS of Illinois | |
| TZB | Highmark BCBS | |
| TZC | BCBS of Illinois | |
| TZD | Anthem BCBS of Ohio | |
| TZE | BCBS of Illinois | |
| TZF | Horizon BCBS of New Jersey | |
| TZG | Blue Shield of California | |
| TZH | Unassigned Prefix | |
| TZI | Empire BCBS of New York | |
| TZJ | BCBS of Illinois | |
| TZK | Unassigned Prefix | |
| TZL | Highmark BCBS | |
| TZM | Anthem Blue Cross of California | |
| TZN | Anthem BCBS of Ohio | |
| TZO | Anthem Blue Cross of California | |
| TZP | Regence Blue Cross Blue Shield of Utah | |
| TZQ | Anthem BCBS of Ohio | |
| TZR | BCBS of Illinois | |
| TZS | Premera Blue Cross | |
| TZT | BCBS of Arkansas | |
| TZU | Highmark BCBS | |
| TZV | BCBS of Georgia | |
| TZW | Highmark BCBS | |
| TZX | Anthem BCBS of Colorado | |
| TZY | Highmark BCBS | |
| TZZ | Anthem Blue Cross of California |