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