| Prefix | Plan Name | |
|---|---|---|
| W2A | Blue Shield of Northeastern New York | |
| W2B | Blue Cross Blue Shield of Illinois | |
| W2C | Anthem BCBS of Georgia | |
| W2E | Anthem BCBS of Colorado | |
| W2F | Blue Cross Blue Shield of Illinois | |
| W2G | Regence Blue Cross Blue Shield of Oregon | |
| W2I | Anthem BCBS of Virginia | |
| W2K | Blue Cross Blue Shield of Arkansas | |
| W2L | Blue Cross Blue Shield of Illinois | |
| W2M | Blue Cross Blue Shield of Illinois | |
| W2N | Blue Cross Blue Shield of Arkansas | |
| W2P | Regence Blue Cross Blue Shield of Oregon | |
| W2S | Regence Blue Shield of Washington | |
| W2T | Regence Blue Cross Blue Shield of Oregon | |
| W2W | Blue Cross Blue Shield of Arkansas | |
| W3A | Highmark BCBS of Pennsylvania | |
| W3C | Regence Blue Shield of Washington | |
| W3E | Blue Cross of California | |
| W3H | Premera Blue Cross | |
| W3K | Premera Blue Cross | |
| W3M | Blue Cross Blue Shield of Illinois | |
| W3P | Empire Blue Cross Blue Shield | |
| W3T | Blue Cross Blue Shield of Arkansas | |
| W3W | Empire Blue Cross Blue Shield | |
| W3X | Empire Blue Cross Blue Shield | |
| W4F | Blue Cross Blue Shield of Texas | |
| W4G | Blue Cross Blue Shield of Texas | |
| W4J | Blue Cross Blue Shield of Texas | |
| W4K | Blue Cross Blue Shield of Texas | |
| W4M | Blue Cross Blue Shield of Texas | |
| W4N | Blue Cross Blue Shield of Texas | |
| W4P | Blue Cross Blue Shield of Texas | |
| W4R | Blue Cross Blue Shield of Texas | |
| W4T | Premera Blue Cross | |
| W4V | Blue Cross Blue Shield of Texas | |
| W4W | Blue Cross Blue Shield of Texas | |
| W4X | Blue Cross Blue Shield of Texas | |
| W4Y | Blue Cross Blue Shield of Texas | |
| W4Z | Blue Cross Blue Shield of Texas | |
| W5H | Premera Blue Cross | |
| W5M | Blue Cross Blue Shield of Illinois | |
| W5T | Premera Blue Cross | |
| W6A | Blue Cross Blue Shield of Texas | |
| W7H | Blue Cross Blue Shield of Illinois | |
| W8A | Anthem BCBS of Wisconsin | |
| W8B | Anthem BCBS of Wisconsin | |
| WAA | BCBS of Alabama | |
| WAB | BCBS of Illinois | |
| WAC | Regence BCBS | |
| WAD | BCBS of Florida | |
| WAE | BCBS of Texas | |
| WAF | Premera BCBS of Alaska | |
| WAG | BCBS of Illinois | |
| WAH | Premera Blue Cross | |
| WAI | Regence BCBS | |
| WAJ | BCBS of South Carolina | |
| WAK | BCBS of South Carolina | |
| WAL | BCBS of Massachusetts | |
| WAM | Highmark BCBS | |
| WAN | BCBS of Michigan | |
| WAO | Blue Shield of California | |
| WAP | Carefirst BCBS of Maryland | |
| WAQ | BCBS of South Carolina | |
| WAR | BCBS of South Carolina | |
| WAS | Unassigned Prefix | |
| WAT | BCBS of Rhode Island | |
| WAU | Wellmark BCBS | |
| WAV | BCBS of Massachusetts | |
| WAW | BCBS of Massachusetts | |
| WAX | Premera Blue Cross | |
| WAY | Horizon BCBS of New Jersey | |
| WAZ | Premera Blue Cross | |
| WBA | BCBS of Illinois | |
| WBB | Blue Shield of California | |
| WBC | Premera Blue Cross | |
| WBD | BCBS of South Carolina | |
| WBE | Blue Cross of Idaho | |
| WBF | Highmark BCBS | |
| WBG | Regence BCBS of Washington | |
| WBH | Anthem BCBS of Ohio | |
| WBI | Anthem BCBS of Ohio | |
| WBJ | Premera Blue Cross | |
| WBK | BCBS of North Carolina | |
| WBL | Anthem BCBS of Kentucky | |
| WBM | Wellmark BCBS | |
| WBN | Highmark BCBS | |
| WBO | BCBS of Oklahoma | |
| WBP | Regence BCBS of Washington | |
| WBQ | BCBS of Michigan | |
| WBR | Anthem Blue Cross of California | |
| WBS | Wellmark BCBS | |
| WBT | Anthem BCBS of Ohio | |
| WBU | BCBS of Michigan | |
| WBV | BCBS of Illinois | |
| WBW | BCBS of Nebraska | |
| WBX | Blue Shield of Northeastern New York | |
| WBY | BCBS of Minnesota | |
| WBZ | Blue Cross of Idaho | |
| WCA | Unassigned Prefix | |
| WCB | Wellmark BCBS |
| WCC | BCBS of Illinois | |
| WCD | BCBS of Minnesota | |
| WCE | Anthem Blue Cross of California | |
| WCF | Unassigned Prefix | |
| WCG | Anthem BCBS of Ohio | |
| WCH | BCBS of Massachusetts | |
| WCI | Anthem BCBS of Wisconsin | |
| WCJ | Unassigned Prefix | |
| WCK | BCBS of Massachusetts | |
| WCL | Premera Blue Cross | |
| WCM | Highmark BCBS | |
| WCN | Regence BCBS | |
| WCO | Capital Blue Cross | |
| WCP | Regence Blue Cross Blue Shield of Oregon | |
| WCQ | Wellmark BCBS | |
| WCR | Unassigned Prefix | |
| WCS | BCBS of Minnesota | |
| WCT | Anthem Blue Cross of California | |
| WCU | Anthem Blue Cross of California | |
| WCV | BCBS of Massachusetts | |
| WCW | Blue Shield of California | |
| WCX | Wellmark BCBS | |
| WCY | Regence BCBS of Washington | |
| WCZ | Blue Cross of Idaho | |
| WDA | Carefirst BCBS of Maryland | |
| WDB | Anthem BCBS of Virginia | |
| WDC | Unassigned Prefix | |
| WDD | Carefirst BCBS of Maryland | |
| WDE | BCBS of Alabama | |
| WDF | Carefirst BCBS of Maryland | |
| WDG | Carefirst BCBS of Maryland | |
| WDH | Wellmark BCBS | |
| WDI | Independence Blue Cross | |
| WDJ | Unassigned Prefix | |
| WDK | Carefirst BCBS of Maryland | |
| WDL | Unassigned Prefix | |
| WDM | BCBS of Nebraska | |
| WDN | Unassigned Prefix | |
| WDO | Independence Blue Cross | |
| WDP | HIghmark BCBS | |
| WDQ | Anthem BCBS of Ohio | |
| WDR | Regence Blue Shield of Washington | |
| WDS | BCBS of South Carolina | |
| WDT | Regence Blue Cross Blue Shield of Utah | |
| WDU | Blue Shield of Ohio | |
| WDV | Independence Blue Cross | |
| WDW | Unassigned Prefix | |
| WDX | Anthem BCBS of Virginia | |
| WDY | Unassigned Prefix | |
| WDZ | Anthem Blue Cross of California | |
| WEA | Anthem BCBS of Georgia | |
| WEB | Regence Blue Cross Blue Shield of Oregon | |
| WEC | BCBS of Minnesota | |
| WED | Blue Shield of California | |
| WEE | Wellmark BCBS | |
| WEF | BCBS of Minnesota | |
| WEG | BCBS of Texas | |
| WEH | Wellmark BCBS | |
| WEI | Wellmark BCBS | |
| WEJ | Carefirst BCBS | |
| WEK | Wellmark BCBS | |
| WEL | BCBS of Massachusetts | |
| WEM | Anthem Blue Cross of California | |
| WEN | Unassigned Prefix | |
| WEO | Unassigned Prefix | |
| WEP | Anthem Blue Cross of California | |
| WEQ | BCBS of Nebraska | |
| WER | BCBS of Nebraska | |
| WES | BCBS of Arkansas Blue Advantage | |
| WET | Anthem Blue Cross of California | |
| WEU | Premera Blue Cross | |
| WEV | BCBS of Western New York | |
| WEW | Carefirst BCBS of Maryland | |
| WEX | Regence BCBS of Utah | |
| WEY | Unassigned Prefix | |
| WEZ | Unassigned Prefix | |
| WFA | Highmark BCBS | |
| WFB | Carefirst BCBS of Maryland | |
| WFC | Blue Cross of Idaho | |
| WFD | Anthem Blue Cross of California | |
| WFE | Regence BCBS of Washington | |
| WFF | BCBS of Tennessee | |
| WFG | Regence BCBS | |
| WFH | BCBS of Alabama | |
| WFI | Empire BCBS of New York | |
| WFJ | Carefirst BCBS of Maryland | |
| WFK | BCBS of Michigan | |
| WFL | Anthem BCBS of Georgia | |
| WFM | Excellus BCBS of New York | |
| WFN | Regence BCBS of Washington | |
| WFO | BCBS of Tennessee | |
| WFP | BCBS of Illinois | |
| WFQ | Anthem BCBS of Indiana | |
| WFR | Unassigned Prefix | |
| WFS | BCBS of Kansas City | |
| WFT | Premera Blue Cross | |
| WFU | BCBS of South Carolina | |
| WFV | Carefirst BCBS of Maryland | |
| WFW | Highmark BCBS | |
| WFX | Premera Blue Cross |
| WFY | Carefirst BCBS of Maryland | |
| WFZ | BCBS of South Carolina | |
| WGA | Premera Blue Cross | |
| WGB | Blue Cross of Idaho | |
| WGC | BCBS of Massachusetts | |
| WGD | Wellmark BCBS | |
| WGE | BCBS of Alabama | |
| WGF | Anthem Blue Cross of California | |
| WGG | Unassigned Prefix | |
| WGH | Wellmark BCBS | |
| WGI | BCBS of Michigan | |
| WGJ | Carefirst BCBS of Maryland | |
| WGK | Unassigned Prefix | |
| WGL | Anthem BCBS of Georgia | |
| WGM | Anthem BCBS of Virginia | |
| WGN | Excellus BCBS of New York | |
| WGO | Blue Shield of California | |
| WGP | Wellmark BCBS | |
| WGQ | Anthem BCBS of New Hampshire | |
| WGR | Wellmark BCBS | |
| WGS | Unassigned Prefix | |
| WGT | BCBS of Western New York | |
| WGU | Unassigned Prefix | |
| WGV | Anthem Blue Cross of California | |
| WGW | Anthem BCBS of Missouri | |
| WGX | BCBS of Arkansas | |
| WGY | Carefirst BCBS of Maryland | |
| WGZ | BCBS of Illinois | |
| WHA | Unassigned Prefix | |
| WHB | BCBS of Massachusetts | |
| WHC | BCBS of Michigan | |
| WHD | BCBS of Michigan | |
| WHE | Carefirst BCBS | |
| WHF | Wellmark BCBS | |
| WHG | Highmark BCBS | |
| WHH | Blue Shield of California | |
| WHI | Empire BCBS of New York | |
| WHJ | BCBS of Massachusetts | |
| WHK | BCBS of Louisiana | |
| WHL | BCBS of Western New York | |
| WHM | Unassigned Prefix | |
| WHN | BCBS of Michigan | |
| WHO | BCBS of Michigan | |
| WHP | Carefirst BCBS of Maryland | |
| WHQ | Highmark BCBS | |
| WHR | Highmark BCBS | |
| WHS | BCBS of Illinois | |
| WHT | BCBS of Massachusetts | |
| WHU | Wellmark BCBS | |
| WHV | Independence Blue Cross | |
| WHW | BCBS of Minnesota | |
| WHX | BCBS of Massachusetts | |
| WHY | Anthem BCBS of Ohio | |
| WHZ | Anthem BCBS of Georgia | |
| WIA | Anthem BCBS of Virginia | |
| WIB | BCBS of South Carolina | |
| WIC | Capital Blue Cross | |
| WID | BCBS of Michigan | |
| WIE | BCBS of Arkansas Blue Advantage | |
| WIF | BCBS of North Carolina | |
| WIG | Anthem BCBS of Wisconsin | |
| WIH | Premera Blue Cross | |
| WII | BCBS of Alabama | |
| WIJ | BCBS of Georgia | |
| WIK | Blue Shield of California | |
| WIL | BCBS of Alabama | |
| WIM | Blue Shield of California | |
| WIN | Wellmark BCBS | |
| WIO | Blue Shield of California | |
| WIP | Regence BCBS | |
| WIQ | Independence Blue Cross | |
| WIR | BCBS of Michigan | |
| WIS | Unassigned Prefix | |
| WIT | BCBS of Michigan | |
| WIU | Anthem BCBS of Wisconsin | |
| WIV | Independence Blue Cross | |
| WIW | BCBS of Georgia | |
| WIX | Anthem BCBS of Georgia | |
| WIY | BCBS of Kansas City | |
| WIZ | Regence Blue Cross Blue Shield of Oregon | |
| WJA | Premera Blue Cross | |
| WJB | Anthem BCBS of California | |
| WJC | Carefirst BCBS of Maryland | |
| WJD | Anthem BCBS of Georgia | |
| WJE | BCBS of Georgia | |
| WJF | BCBS of Illinois | |
| WJG | BCBS of Massachusetts | |
| WJH | Carefirst Administrators | |
| WJI | Highmark BCBS | |
| WJJ | Carefirst Administrators | |
| WJK | Capital Blue Cross | |
| WJL | BCBS of Nebraska | |
| WJM | Wellmark BCBS | |
| WJN | BCBS of South Carolina | |
| WJO | Highmark BCBS | |
| WJP | Anthem BCBS of Wisconsin | |
| WJQ | Unassigned Prefix | |
| WJR | Anthem BCBS of Virginia | |
| WJS | Anthem BCBS of Ohio | |
| WJT | Anthem BCBS of Missouri |
| WJU | Wellmark BCBS | |
| WJV | BCBS of Texas | |
| WJW | BCBS of Illinois | |
| WJX | BCBS of Illinois | |
| WJY | BCBS of Illinois | |
| WJZ | BCBS of Massachusetts | |
| WKA | Anthem BCBS of Ohio | |
| WKB | Unassigned Prefix | |
| WKC | Capital Blue Cross | |
| WKD | BCBS of Alabama | |
| WKE | Unassigned Prefix | |
| WKF | Anthen Blue Cross of California | |
| WKG | Unassigned Prefix | |
| WKH | Anthem Blue Cross of California | |
| WKI | Regence BCBS | |
| WKJ | Anthem BCBS of Ohio | |
| WKK | BCBS of Illinois | |
| WKL | Premera Blue Cross | |
| WKM | Empire BCBS of New York | |
| WKN | Empire BCBS of New York | |
| WKO | BCBS of Alabama | |
| WKP | Capital Blue Cross | |
| WKQ | Carefirst Administrators | |
| WKR | Anthem BCBS of Wisconsin | |
| WKS | BCBS of Massachusetts | |
| WKT | Anthem BCBS of Wisconsin | |
| WKU | BCBS of North Carolina | |
| WKV | Unassigned Prefix | |
| WKW | BCBS of Massachusetts | |
| WKX | Anthem BCBS of Wisconsin | |
| WKY | BCBS of Illinois | |
| WKZ | Anthem BCBS of Wisconsin | |
| WLA | BCBS of Delaware | |
| WLB | BCBS of South Carolina | |
| WLC | BCBS of Illinois | |
| WLD | Blue Shield of California | |
| WLE | BCBS of Michigan | |
| WLF | BCBS of Illinois | |
| WLG | BCBS of Alabama | |
| WLH | Blue Shield of California | |
| WLI | Anthem BCBS of Ohio | |
| WLJ | Premera Blue Cross | |
| WLK | Blue Cross of Idaho | |
| WLL | BCBS of Illinois | |
| WLM | BCBS of Illinois | |
| WLN | BCBS of Delaware | |
| WLO | BCBS of Kansas City | |
| WLP | Anthem Blue Cross of California | |
| WLQ | Wellmark BCBS | |
| WLR | Empire BCBS of New York | |
| WLS | BCBS of Alabama | |
| WLT | Wellmark BCBS | |
| WLU | Anthem BCBS of Indiana | |
| WLV | BCBS of Alabama | |
| WLW | Wellmark BCBS | |
| WLX | Wellmark BCBS | |
| WLY | Wellmark BCBS | |
| WLZ | BCBS of Delaware | |
| WMA | Wellmark BCBS | |
| WMB | BCBS of Arkansas Blue Advantage | |
| WMC | BCBS of Minnesota | |
| WMD | BCBS of Minnesota | |
| WME | BCBS of Illinois | |
| WMF | Wellmark BCBS | |
| WMG | Anthem Blue Cross of California | |
| WMH | Blue Cross of Northeast Pennsylvania | |
| WMI | BCBS of Michigan | |
| WMJ | BCBS of Arkansas Blue Advantage | |
| WMK | Capital Blue Cross | |
| WML | Anthem BCBS of Wisconsin | |
| WMM | BCBS of Minnesota | |
| WMN | BCBS of Illinois | |
| WMO | Anthem Blue Cross of California | |
| WMP | BCBS of Minnesota | |
| WMQ | Capital Blue Cross | |
| WMR | Anthem BCBS of Indiana | |
| WMS | Anthem BCBS of Indiana | |
| WMT | Anthem Blue Cross of California | |
| WMU | BCBS of Texas | |
| WMV | BCBS of Tennessee | |
| WMW | BCBS of Arkansas Blue Advantage | |
| WMX | Anthem BCBS of Indiana | |
| WMY | BCBS of Arkansas Blue Advantage | |
| WMZ | Anthem BCBS of Indiana | |
| WNA | Anthem BCBS of Indiana | |
| WNB | Empire BCBS of New York | |
| WNC | BCBS of Alabama | |
| WND | Excellus BCBS of New York | |
| WNE | Premera Blue Cross | |
| WNF | Highmark BCBS | |
| WNG | Anthem BCBS of Wisconsin | |
| WNH | Empire BCBS of New York | |
| WNI | Regence BCBS | |
| WNJ | Unassigned Prefix | |
| WNK | BCBS of Arkansas Blue Advantage | |
| WNL | Carefirst BCBS | |
| WNM | BCBS of Western New York | |
| WNN | BCBS of Illinois | |
| WNO | BCBS of Massachusetts | |
| WNP | Anthem Blue Cross of California |
| WNQ | BCBS of Michigan | |
| WNR | Anthem BCBS of Georgia | |
| WNS | BCBS of Illinois | |
| WNT | BCBS of Illinois | |
| WNU | BCBS of Massachusetts | |
| WNV | Unassigned Prefix | |
| WNW | BCBS of Massachusetts | |
| WNX | BCBS of Arkansas | |
| WNY | BCBS of Illinois | |
| WNZ | BCBS of Massachusetts | |
| WOA | Anthem Blue Cross of California | |
| WOB | Premera Blue Cross | |
| WOC | Carefirst Administrators | |
| WOD | Independence Blue Cross | |
| WOE | Blue Cross of California | |
| WOF | BCBS of Michigan | |
| WOG | Unassigned Prefix | |
| WOH | Blue Cross of Northeast Pennsylvania | |
| WOI | Unassigned Prefix | |
| WOJ | BCBS of Arkansas Blue Advantage | |
| WOK | BCBS of South Carolina | |
| WOL | Blue Shield of Northeastern New York | |
| WOM | Independence Blue Cross | |
| WON | Unassigned Prefix | |
| WOO | BCBS of Michigan | |
| WOP | BCBS of Michigan | |
| WOQ | BCBS of Michigan | |
| WOR | Unassigned Prefix | |
| WOS | Anthem BCBS of Nevada | |
| WOT | BCBS of Michigan | |
| WOU | Wellmark BCBS | |
| WOV | Anthem Blue Cross of California | |
| WOW | Premera Blue Cross | |
| WOX | Anthem Blue Cross of California | |
| WOY | BCBS of Michigan | |
| WOZ | Anthem BCBS of Colorado | |
| WPA | BCBS of Arkansas | |
| WPB | Capital Blue Cross | |
| WPC | Anthem Blue Cross of California | |
| WPD | Anthem BCBS of Ohio | |
| WPE | Anthem of Missouri | |
| WPF | Unassigned Prefix | |
| WPG | Carefirst BCBS of Maryland | |
| WPH | BCBS of Alabama | |
| WPI | BCBS of Michigan | |
| WPJ | Unassigned Prefix | |
| WPK | Anthem Blue Cross of California | |
| WPL | Anthem BCBS of Ohio | |
| WPM | Unassigned Prefix | |
| WPN | Unassigned Prefix | |
| WPO | BCBS of Michigan | |
| WPP | Anthem Blue Cross of California | |
| WPQ | Anthem BCBS of Colorado | |
| WPR | Empire BCBS of New York | |
| WPS | BCBS of Arkansas Blue Advantage | |
| WPT | Wellmark BCBS | |
| WPU | Anthem Blue Cross of California | |
| WPV | Anthem Blue Cross of California | |
| WPW | Anthem BCBS of Indiana | |
| WPX | Anthem Blue Cross of California | |
| WPY | Anthem Blue Cross of California | |
| WPZ | Wellmark BCBS | |
| WQA | Unassigned Prefix | |
| WQB | Independence Blue Cross | |
| WQC | BCBS of Rhose Island | |
| WQD | BCBS of Western New York | |
| WQE | Highmark BCBS | |
| WQF | Anthem BCBS of Virginia | |
| WQG | Highmark BCBS | |
| WQH | Highmark BCBS | |
| WQI | Highmark BCBS | |
| WQJ | BCBS of Western New York | |
| WQK | BCBS of Western New York | |
| WQL | Unassigned Prefix | |
| WQM | Anthem BCBS of Wisconsin | |
| WQN | BCBS of Illinois | |
| WQO | BCBS of Western New York | |
| WQP | Anthem BCBS of Ohio | |
| WQQ | BCBS of Western New York | |
| WQR | Highmark BCBS | |
| WQS | Unassigned Prefix | |
| WQT | BCBS of South Carolina | |
| WQU | Anthem BCBS of Ohio | |
| WQV | BCBS of Minnesota | |
| WQW | BCBS of Florida | |
| WQX | Blue Shield of California | |
| WQY | Anthem BCBS of Ohio | |
| WQZ | BCBS of North Carolina | |
| WRA | Wellmark BCBS | |
| WRB | Unassigned Prefix | |
| WRC | Horizon BCBS of New Jersey | |
| WRD | Blue Shield of Northeastern New York | |
| WRE | Blue Cross of Idaho | |
| WRF | BCBS of Massachusetts | |
| WRG | Anthem BCBS of Ohio | |
| WRH | Unassigned Prefix | |
| WRI | BCBS of Alabama | |
| WRJ | BCBS of South Carolina | |
| WRK | BCBS of Rhose Island | |
| WRL | Regence Blue Cross Blue Shield of Utah |
| WRM | Highmark BCBS | |
| WRN | Regence BCBS | |
| WRO | Anthem BCBS of Georgia | |
| WRP | Unassigned Prefix | |
| WRQ | Anthem BCBS of Georgia | |
| WRR | BCBS of Western New York | |
| WRS | Anthem Blue Cross of California | |
| WRT | Blue Cross of Idaho | |
| WRU | Wellmark BCBS | |
| WRV | BCBS of Alabama | |
| WRW | BCBS of Rhose Island | |
| WRX | Anthem Blue Cross of California | |
| WRY | Anthem BCBS of Georgia | |
| WRZ | Anthem BCBS of Georgia | |
| WSA | Empire BCBS of New York | |
| WSB | BCBS of Minnesota | |
| WSC | BCBS of Illinois | |
| WSD | Anthem BCBS of Wisconsin | |
| WSE | BCBS of Arizona | |
| WSF | BCBS of Arkansas | |
| WSG | Blue Shield of California | |
| WSH | Highmark BCBS | |
| WSI | Carefirst BCBS of Maryland | |
| WSJ | Anthem Blue Cross of California | |
| WSK | Anthem BCBS of Nevada | |
| WSL | Wellmark BCBS | |
| WSM | BCBS of Wisconsin | |
| WSN | Anthem Blue Cross of California | |
| WSO | Anthem BCBS of Ohio | |
| WSP | Anthem BCBS of Indiana | |
| WSQ | BCBS of Massachusetts | |
| WSR | Unassigned Prefix | |
| WSS | BCBS of Western New York | |
| WST | BCBS of Massachusetts | |
| WSU | Wellmark BCBS | |
| WSV | Wellmark BCBS | |
| WSW | BCBS of Illinois | |
| WSX | BCBS of Minnesota | |
| WSY | Anthem BCBS of Ohio | |
| WSZ | BCBS of Illinois | |
| WTA | Anthem BCBS of Ohio | |
| WTB | Wellmark BCBS | |
| WTC | Premera Blue Cross | |
| WTD | BCBS of Western New York | |
| WTE | BCBS of Illinois | |
| WTF | BCBS of Nebraska | |
| WTG | Regence BCBS of Oregon | |
| WTH | BCBS of Illinois | |
| WTI | Anthem BCBS of Virginia | |
| WTJ | Unassigned Prefix | |
| WTK | Anthem Blue Cross of California | |
| WTL | Unassigned Prefix | |
| WTM | BCBS of Illinois | |
| WTN | Wellmark BCBS | |
| WTO | BCBS of Arkansas Blue Advantage | |
| WTP | Carefirst BCBS of Maryland | |
| WTQ | BCBS of Alabama | |
| WTR | BCBS of Illinois | |
| WTS | Anthem BCBS of Wisconsin | |
| WTT | Premera Blue Cross | |
| WTU | Premera Blue Cross | |
| WTV | Premera Blue Cross | |
| WTW | Independence Blue Cross | |
| WTX | Unassigned Prefix | |
| WTY | Unassigned Prefix | |
| WTZ | BCBS of Illinois | |
| WUA | BCBS of Massachusetts | |
| WUB | BCBS of Texas | |
| WUC | Empire BCBS of New York | |
| WUD | Unassigned Prefix | |
| WUE | Blue Shield of California | |
| WUF | Independence Blue Cross | |
| WUG | Horizon BCBS of New Jersey | |
| WUH | Carefirst BCBS | |
| WUI | Anthem BCBS of Ohio | |
| WUJ | BCBS of Rhose Island | |
| WUK | Anthem BCBS of Indiana | |
| WUL | Anthem BCBS of Indiana | |
| WUM | Highmark BCBS | |
| WUN | BCBS of North Carolina | |
| WUO | Blue Shield of California | |
| WUP | Anthem Blue Cross of California | |
| WUQ | Wellmark BCBS | |
| WUR | Horizon BCBS of New Jersey | |
| WUS | Anthem BCBS of Colorado | |
| WUT | Anthem BCBS of Ohio | |
| WUU | BCBS of South Carolina | |
| WUV | BCBS of Massachusetts | |
| WUW | Anthem Blue Cross of California | |
| WUX | Anthem BCBS of Ohio | |
| WUY | Blue Cross of Idaho | |
| WUZ | Unassigned Prefix | |
| WVA | Blue Cross of Idaho | |
| WVB | Unassigned Prefix | |
| WVC | Anthem BCBS of Wisconsin | |
| WVD | BCBS of South Carolina | |
| WVE | BCBS of Illinois | |
| WVF | Unassigned Prefix | |
| WVG | BCBS of South Carolina | |
| WVH | Highmark BCBS of West Virginia |
| WVI | Blue Shield of California | |
| WVJ | BCBS of Georgia | |
| WVK | BCBS of North Carolina | |
| WVL | BCBS of Alabama | |
| WVM | BCBS of Michigan | |
| WVN | Anthem Blue Cross of California | |
| WVO | BCBS of Arkansas Blue Advantage | |
| WVP | Carefirst Administrators | |
| WVQ | Unassigned Prefix | |
| WVR | Anthem BCBS of Georgia | |
| WVS | Blue Shield of California | |
| WVT | Highmark BCBS | |
| WVU | Anthem BCBS of Kentucky | |
| WVV | BCBS of Illinois | |
| WVW | Unassigned Prefix | |
| WVX | Anthem BCBS of Virginia | |
| WVY | Anthem BCBS of Colorado | |
| WVZ | Wellmark BCBS | |
| WWA | Empire BCBS of New York | |
| WWB | BCBS of Massachusetts | |
| WWC | BCBS of Massachusetts | |
| WWD | Regence Blue Cross Blue Shield of Oregon | |
| WWE | Wellmark BCBS | |
| WWF | BCBS of Illinois | |
| WWG | BCBS of Alabama | |
| WWH | BCBS of Texas | |
| WWI | Premera Blue Cross | |
| WWJ | Anthem BCBS of Ohio | |
| WWK | Anthem BCBS of Ohio | |
| WWL | Unassigned Prefix | |
| WWM | Premera Blue Cross | |
| WWN | BCBS of Nebraska | |
| WWO | Carefirst BCBS of Maryland | |
| WWP | Anthem Blue Cross of California | |
| WWQ | Anthem BCBS of Wisconsin | |
| WWR | Wellmark BCBS | |
| WWS | Anthem Blue Cross of California | |
| WWT | Carefirst BCBS of Maryland | |
| WWU | BCBS of Massachusetts | |
| WWV | BCBS of Texas | |
| WWW | Carefirst BCBS | |
| WWX | Carefirst BCBS of Maryland | |
| WWY | BCBS of Massachusetts | |
| WWZ | BCBS of Michigan | |
| WXA | Premera Blue Cross | |
| WXB | Wellmark BCBS | |
| WXC | BCBS of Texas | |
| WXD | BCBS of Texas | |
| WXE | Nebraska BCBS | |
| WXF | BCBS of Texas | |
| WXG | BCBS of Texas | |
| WXH | BCBS of South Carolina | |
| WXI | Unassigned Prefix | |
| WXJ | Regence BCBS | |
| WXK | Wellmark BCBS | |
| WXL | BCBS of Minnesota | |
| WXM | Highmark BCBS | |
| WXN | BCBS of Illinois | |
| WXO | Anthem BCBS of Colorado | |
| WXP | Anthem BCBS of Missouri | |
| WXQ | Wellmark BCBS | |
| WXR | BCBS of Texas | |
| WXS | BCBS of Tennessee | |
| WXT | Blue Shield of California | |
| WXU | BCBS of Texas | |
| WXV | BCBS of Michigan | |
| WXW | Blue Shield of California | |
| WXX | BCBS of Texas | |
| WXY | Anthem Blue Cross of California | |
| WXZ | BCBS of South Carolina | |
| WYA | Unassigned Prefix | |
| WYB | BCBS of Illinois | |
| WYC | Anthem Blue Cross of California | |
| WYD | Anthem BCBS of Virginia | |
| WYE | Horizon BCBS of New Jersey | |
| WYF | Wellmark BCBS | |
| WYG | Anthem BCBS of Ohio | |
| WYH | BCBS of Illinois | |
| WYI | BCBS of Michigan | |
| WYJ | Anthem BCBS of Virginia | |
| WYK | Anthem BCBS of Virginia | |
| WYL | Anthem Blue Cross of California | |
| WYM | BCBS of Illinois | |
| WYN | Unassigned Prefix | |
| WYO | BCBS of Michigan | |
| WYP | Premera Blue Cross | |
| WYQ | Anthem BCBS of Virginia | |
| WYR | BCBS of Arkansas Blue Advantage | |
| WYS | BCBS of Alabama | |
| WYT | Carefirst BCBS of Maryland | |
| WYU | BCBS of Illinois | |
| WYV | Regence BCBS of Washington | |
| WYW | Blue Cross of Idaho | |
| WYX | Independence Blue Cross | |
| WYY | BCBS of Oklahoma | |
| WYZ | BCBS of South Carolina | |
| WZA | BCBS of Illinois | |
| WZB | Anthem BCBS of Wisconsin | |
| WZC | Wellmark BCBS | |
| WZD | Anthem BCBS of Wisconsin |
| WZE | Unassigned Prefix | |
| WZF | Carefirst BCBS | |
| WZG | BCBS of Texas | |
| WZH | Premera Blue Cross | |
| WZI | Blue Shield of California | |
| WZJ | Unassigned Prefix | |
| WZK | Regence BCBS of Washington | |
| WZL | Anthem BCBS of Wisconsin | |
| WZM | Anthem BCBS of Ohio | |
| WZN | Wellmark BCBS | |
| WZO | Regence BCBS | |
| WZP | Anthem BCBS of Wisconsin | |
| WZQ | Regence BCBS of Washington | |
| WZR | Anthem BCBS of Colorado | |
| WZS | Anthem BCBS of Colorado | |
| WZT | Anthem BCBS of Colorado | |
| WZU | Anthem BCBS of Wisconsin | |
| WZV | Anthem BCBS of Wisconsin | |
| WZW | BCBS of South Carolina | |
| WZX | Wellmark BCBS | |
| WZY | Anthem BCBS of Ohio | |
| WZZ | BCBS of Minnesota |