| QAC QAF QAS QAV QBD QBF QBI QBJ QBK QBM QBO QBQ QBT QBU QBV QBW QBX QBY QBZ QCM QCQ QDI QEA QEB QEC QEF QEI QEM QET QEU QEV QEZ QFA QFB QFG QFI QFL QFN QFO QFQ QFR QFT QFZ QGA QGP QHY QIM QIX QLH QLM QMH QMK QMM QMP QMT QND QNM QNO QNS QOS QOV QOX QPA QPB QPC QPD QPE QPF QPG QPH QPI QPL QPU QQH QQS QRA QRB QRC QRD QRE QRF QRL QRP QSA QSB QSC QSD QSE QSF QSK QSO QSQ QSR QST QTF QTI QTW QUS QVA QVC QVE QVF QVH QVN QWT QWU QWV QWZ QXV QXW QXZ QYX QZB QZE QZF QZO QZU QZY | Alpha Prefix not assigned or unallocated |
| QAB QAR QER QFS QFV QGW QMU QPW QQP QRN QRR QRS QRT QRU QRV QRW QRX QRY QSM QSS QTE QTT QUW QVM QWP QWW QZH | Anthem Blue Cross Blue Shield of Colorado |
| QAE QAI QAT QAX QEQ QEY QFM QGK QGV QHP QHW QIA QIT QJD QJT QJV QKD QKE QKM QKN QLE QMW QMX QMZ QNB QNG QNH QNQ QNV QPP QPZ QQA QQM QRM QRQ QSG QSJ QSU QSW QTP QTY QTZ QUP QYL QYR QZL | Anthem Blue Cross Blue Shield of Georgia |
| QOA | Anthem Blue Cross Blue Shield of Indiana |
| QNA QNP QSL QTS | Anthem Blue Cross Blue Shield of Kentucky |
| QWX | Anthem Blue Cross Blue Shield of Maine |
| QCT QJF QKJ QKU QLQ QLR QNU QPS QRI QRK QTU | Anthem Blue Cross Blue Shield of Missouri |
| QEP QEW QJA QQB QSI QVS QYS QZS | Anthem Blue Cross Blue Shield of Nevada |
| QAO QAQ QFY QGB QGI QGN QGQ QHZ QJM QKL QLX QMR QOP QPK QPM QPY QSN QSZ QTA QUO QVB QVG QVP QWL QWR QYP | Anthem Blue Cross Blue Shield of Ohio |
| QAJ QBC QDB QDG QDK QDL QDT QEK QGR QGS QHQ QHT QIE QIH QJH QKA QKB QKH QLT QQJ QTB QUH QYB QYH | Anthem Blue Cross Blue Shield of Virginia |
| QLJ QLK QQU QUB | Anthem Blue Cross Blue Shield of Wisconsin |
| QAP QBH QCY QED QEG QFU QFX QGD QGF QGG QGH QGJ QGO QIN QIP QKP QKV QLB QNC QOB QOH QPX QQV QQW QRG QRH QTC QTL QTQ QUA QUC QUF QVT QWA QWB QWC QWD QWE QWF QWG QWH QWN QWS QZT | Anthem Bluecross of California |
| QAK QAU QAW QAY QEH QGE QGX QIG QIL QLC QLG QLN QNF QTD QVL | Blue Cross Blue Shield of Alabama |
| QMA QMB QMC QMD QME QMF QMG | Blue Cross Blue Shield of Illinois |
| QBA QBB QBE QBG QBS | Blue Cross Blue Shield of Louisiana |
| QCS QNE QSV QTK QVR QXX | Blue Cross Blue Shield of Massachusetts |
| QEO QGY QGZ QID QII QIJ QIO QIQ QIR QIU QIY QIZ QJG QJI QJJ QJL QJN QJR QJU QJX QJY QJZ QKF QKG QKI QKK QKO QKQ QKR QKX QKY QKZ QLZ QNI QNJ QNK QNX QNY QOD QOE QOF QOG QOJ QOK QOL QON QOO QOQ QOR QOT QOU QOW QOY QOZ QQO QQX QQY QRJ QRO QUG QUI QUJ QUQ QUR QUU QUV QUX QUY QUZ QVD QVI QVJ QVK QVO QVQ QVU QVV QVW QVX QVY QVZ QWK QWO QWQ QXO QXY QYI QYJ QYK QYN QYO QYQ QYU QYV QYW QYY QZI QZR QZV QZZ | Blue Cross Blue Shield of Michigan |
| QAM QBL QCU QCV QEL QIS QKW QQG QQI QQK QQL QQN QQQ QWI | Blue Cross Blue Shield of Minnesota |
| QCZ QFC | Blue Cross Blue Shield of Nebraska |
| QOI | Blue Cross Blue Shield of North Carolina |
| QIF QJE QLW QTJ QTO QUD QUN | Blue Cross Blue Shield of Rhode Island |
| QLI | Blue Cross Blue Shield of South Carolina |
| QAA QAZ QLL QMI QMJ QZN QZW | Blue Cross Blue Shield of Tennessee |
| QEJ QFK QFW QGC QJB QJK QJQ QJW QLD QLF QMN QNW QNZ QPT QQZ QWJ QXQ QYM QYZ QZG QZJ QZK QZQ QZX | Blue Cross Blue Shield of Western New York |
| QWY | Blue Cross Blue Shield of Wyoming |
| QGM QPO | Bluecross of Idaho |
| QAN QCF QEE QGU QIB QMS QNN QPQ QQC QUT | Blueshield of California |
| QHV QKT QRZ QZP | Blueshield of Northeastern New York |
| QMQ | Capital Bluecross of Pennsylvania |
| QUL QXA QXB QXC QXD QXE QXF QXG QXH QXI QXK QXL QXM QXN QXP QXR QXS QXT QXU | Carefirst Blue Cross Blue Shield(Maryland/District of Columbia/Northern Virginia) |
| QBP QBR QCD QCW QKC QLA QLP QNR QPV QSH QZM | Empire Blue Cross Blue Shield of New York |
| QFE QFF QFH QFJ QHA QHB QHC QHD QHE QHF QHG QHH QHI QHJ QHK QHL QHM QHN QHO QHS | Geo Blue Blue Cross Blue Shield |
| QTX | Highmark Blue Cross Blue Shield of Delaware |
| QDA QDC QDD QDE QDF QDH QDJ QDM QDN QDO QDP QDQ QDR QDS QDU QDV QDW QDY QDZ QIW QJO QJP QJS QKS QLS QMV QNL QOC QYA QYC QYD QYE QYF QYG QZA QZC QZD | Highmark Blue Cross Blue Shield of Pennsylvania |
| QBN QCA QCC QCE QCG QCH QCI QCJ QCK QCL QCN QCO QCR QCX QDX QES QEX QHX QMO QSP QXJ | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| QAH QEN QFP QHR QHU QML QNT QSX QSY QTH QTV | Premera Blue Cross Blue Shield of Alaska |
| QAD QAG QAL QIC QIV QJC QLV QLY QMY QOM QPJ QPN QQD QQE QQF QQR QQT QTG QTM QTN QTR QUK QUM QYT | Regence Blue Cross Blue Shield(Oregon/Idaho/Utah/Washington) |
| QCB QCP QFD QGL QGT QIK QLO QLU QPR QUE QWM | Wellmark Blue Cross Blue Shield of South Dakota/Iowa |