BCBS alpha prefix IAA-IZZ
| BCBS Prefix | BCBS Plan Name |
| IAA | Not Assigned Prefix |
| IAB | Not Assigned Prefix |
| IAD | Not Assigned Prefix |
| IAF | Not Assigned Prefix |
| IAG | Anthem BCBS Virginia |
| IAI | BCBS South Carolina |
| IAJ | Not Assigned Prefix |
| IAK | Not Assigned Prefix |
| IAL | Wellmark BCBS |
| IAM | Blue Shield California |
| IAP | Wellmark BCBS |
| IAQ | BCBS Nebraska |
| IAR | BCBS Alabama |
| IAS | Not Assigned Prefix |
| IAT | Empire BCBS New York |
| IAU | BCBS Nebraska |
| IAV | Wellmark BCBS |
| IAW | Wellmark BCBS |
| IAX | Not Assigned Prefix |
| IAY | BCBS South Carolina |
| IAZ | Not Assigned Prefix |
| IBA | BCBS Illinois |
| IBB | Horizon BCBS New Jersey |
| IBC | BCBS South Carolina |
| IBD | BCBS South Carolina |
| IBE | BCBS Illinois |
| IBF | Wellmark BCBS |
| IBG | BCBS Illinois |
| IBH | BCBS Alabama |
| IBI | Wellmark BCBS |
| IBJ | BCBS Michigan |
| IBK | Not Assigned Prefix |
| IBL | Not Assigned Prefix |
| IBM | Not Assigned Prefix |
| IBN | Not Assigned Prefix |
| IBO | Not Assigned Prefix |
| IBP | Wellmark BCBS |
| IBR | BCBS Michigan |
| IBT | BCBS Illinois |
| IBU | BCBS Alabama |
| IBV | Not Assigned Prefix |
| IBW | BCBS Illinois |
| IBY | Anthem Central Region (OH, IN, KY) |
| IBZ | Not Assigned Prefix |
| ICA | Carefirst BCBS Maryland |
| ICB | BCBS Illinois |
| ICC | Independence Blue Cross |
| ICD | Carefirst BCBS Maryland |
| ICE | Carefirst BCBS Maryland |
| ICF | Carefirst BCBS Maryland |
| ICG | BCBS South Carolina |
| ICH | Empire BCBS New York |
| ICI | Not Assigned Prefix |
| ICJ | BCBS Georgia |
| ICK | Carefirst BCBS Maryland |
| ICL | Carefirst BCBS Maryland |
| ICM | Not Assigned Prefix |
| ICN | BCBS Georgia |
| ICO | Not Assigned Prefix |
| ICP | BCBS Georgia |
| ICQ | Anthem BCBS Virginia |
| ICR | Anthem Central Region (OH, IN, KY) |
| ICS | BCBS Michigan |
| ICT | BCBS Western New York |
| ICU | Regence BCBS Utah |
| ICV | BCBS Michigan |
| ICW | BCBS Massachusetts |
| ICX | Not Assigned Prefix |
| ICY | Anthem Central Region (OH, IN, KY) |
| ICZ | Carefirst BCBS Maryland |
| IDA | Blue Cross Idaho |
| IDB | Not Assigned Prefix |
| IDC | Not Assigned Prefix |
| IDD | Anthem BCBS Virginia |
| IDG | Carefirst BCBS Maryland |
| IDH | Not Assigned Prefix |
| IDJ | Anthem BCBS Virginia |
| IDK | Not Assigned Prefix |
| IDL | Not Assigned Prefix |
| IDN | Not Assigned Prefix |
| IDO | Not Assigned Prefix |
| IDP | Blue Cross Idaho |
| IDQ | Not Assigned Prefix |
| IDR | Anthem Blue Cross California |
| IDS | Not Assigned Prefix |
| IDT | Not Assigned Prefix |
| IDU | Not Assigned Prefix |
| IDW | Anthem Central Region (OH, IN, KY) |
| IDX | BCBS Illinois |
| IDY | Not Assigned Prefix |
| IDZ | Carefirst BCBS Maryland |
| IEA | Not Assigned Prefix |
| IEB | Anthem |
| IEC | Blue Shield California |
| IED | Anthem Central Region (OH, IN, KY) |
| IEF | Not Assigned Prefix |
| IEG | Carefirst BCBS Maryland |
| IEH | Premera Blue Cross |
| IEL | BCBS Illinois |
| IEM | Not Assigned Prefix |
| IEN | Not Assigned Prefix |
| IEP | BCBS Louisiana |
| IEQ | Anthem Central Region (OH, IN, KY) |
| IER | Not Assigned Prefix |
| IES | BCBS Texas |
| IET | Not Assigned Prefix |
| IEU | BCBS Louisiana |
| IEV | BCBS Alabama |
| IEW | BCBS Illinois |
| IEX | Not Assigned Prefix |
| IFA | Not Assigned Prefix |
| IFB | Wellmark BCBS |
| IFC | BCBS Western New York |
| IFD | Not Assigned Prefix |
| IFE | Not Assigned Prefix |
| IFF | Wellmark BCBS |
| IFG | Anthem Central Region (OH, IN, KY) |
| IFH | Not Assigned Prefix |
| IFI | Not Assigned Prefix |
| IFL | Regence Blue Cross Blue Shield Oregon |
| IFP | Not Assigned Prefix |
| IFQ | Carefirst BCBS Maryland |
| IFR | Anthem Central Region (OH, IN, KY) |
| IFS | BCBS Kansas City |
| IFW | Not Assigned Prefix |
| IFX | Not Assigned Prefix |
| IFY | Carefirst BCBS Maryland |
| IGB | BCBS Georgia |
| IGC | Carefirst Administrators |
| IGD | Wellmark BCBS |
| IGH | Not Assigned Prefix |
| IGI | Wellmark BCBS |
| IGK | Not Assigned Prefix |
| IGL | Not Assigned Prefix |
| IGN | Not Assigned Prefix |
| IGP | Wellmark BCBS |
| IGR | Not Assigned Prefix |
| IGS | BCBS Alabama |
| IGT | Blue Shield California |
| IGV | Not Assigned Prefix |
| IGW | Carefirst BCBS Maryland |
| IGX | Carefirst BCBS Maryland |
| IGY | Carefirst BCBS Maryland |
| IGZ | Not Assigned Prefix |
| IHA | Blue Shield California |
| IHB | Wellmark BCBS |
| IHC | Carefirst BCBS Maryland |
| IHD | BCBS Nebraska |
| IHE | Anthem Central Region (OH, IN, KY) |
| IHF | Empire BCBS New York |
| IHG | Not Assigned Prefix |
| IHH | BCBS Alabama |
| IHK | Not Assigned Prefix |
| IHL | Not Assigned Prefix |
| IHM | Not Assigned Prefix |
| IHN | Not Assigned Prefix |
| IHP | Carefirst BCBS Maryland |
| IHQ | Not Assigned Prefix |
| IHR | Not Assigned Prefix |
| IHS | Not Assigned Prefix |
| IHT | BCBS Alabama |
| IHV | Horizon BCBS New Jersey |
| IHW | Blue Shield California |
| IHX | Horizon BCBS New Jersey |
| IHZ | Anthem Blue Cross California |
| IIB | BCBS Michigan |
| III | BCBS Tennessee |
| IIS | BCBS Michigan |
| IIT | BCBS Illinois |
| IJA | Anthem Central Region (OH, IN, KY) |
| IJB | Anthem |
| IJC | BCBS South Carolina |
| IJD | Not Assigned Prefix |
| IJK | Not Assigned Prefix |
| IJM | Not Assigned Prefix |
| IJO | Not Assigned Prefix |
| IJP | Not Assigned Prefix |
| IJR | Blue Cross Idaho |
| IJS | Anthem Central Region (OH, IN, KY) |
| IJU | BCBS Texas |
| IJW | Horizon BCBS New Jersey |
| IJX | Not Assigned Prefix |
| IKA | Not Assigned Prefix |
| IKB | Not Assigned Prefix |
| IKC | Not Assigned Prefix |
| IKD | Wellmark BCBS |
| IKE | Independence Blue Cross |
| IKF | Independence Blue Cross |
| IKH | Wellmark BCBS |
| IKI | Not Assigned Prefix |
| IKL | Anthem BCBS Virginia |
| IKM | Independence Blue Cross |
| IKN | Not Assigned Prefix |
| IKO | Not Assigned Prefix |
| IKP | Not Assigned Prefix |
| IKQ | Wellmark BCBS |
| IKT | Blue Cross Idaho |
| IKZ | Not Assigned Prefix |
| ILA | Not Assigned Prefix |
| ILB | BCBS Massachusetts |
| ILC | Wellmark BCBS |
| ILD | BCBS Michigan |
| ILF | Not Assigned Prefix |
| ILG | Blue Shield California |
| ILH | Anthem Blue Cross California |
| ILI | Blue Shield California |
| ILL | Anthem Blue Cross California |
| ILM | Anthem Blue Cross California |
| ILN | BCBS Tennessee |
| ILP | Not Assigned Prefix |
| ILR | Anthem Central Region (OH, IN, KY) |
| ILS | Premera Blue Cross |
| ILT | BCBS Illinois |
| ILU | Anthem Blue Cross California |
| ILW | Not Assigned Prefix |
| ILY | Anthem Blue Cross California |
| IMA | Excellus BCBS New York |
| IMB | Not Assigned Prefix |
| IMC | Premera Blue Cross |
| IMD | Anthem |
| IME | Not Assigned Prefix |
| IMF | Not Assigned Prefix |
| IMG | Anthem Blue Cross California |
| IMI | Wellmark BCBS |
| IMM | Anthem BCBS Nevada |
| IMO | Not Assigned Prefix |
| IMP | BCBS Alabama |
| IMQ | Not Assigned Prefix |
| IMR | Not Assigned Prefix |
| IMU | Not Assigned Prefix |
| IMV | Not Assigned Prefix |
| IMW | Not Assigned Prefix |
| IMY | Not Assigned Prefix |
| IMZ | Not Assigned Prefix |
| INA | Not Assigned Prefix |
| INB | Premera Blue Cross |
| INC | Anthem Blue Cross California |
| IND | Anthem BCBS Virginia |
| INE | BCBS South Carolina |
| INF | Blue Shield California |
| ING | Not Assigned Prefix |
| INH | Regence Blue Cross Blue Shield Utah |
| INI | BCBS Delaware |
| INJ | Not Assigned Prefix |
| INM | Not Assigned Prefix |
| INO | Blue Shield California |
| INQ | Not Assigned Prefix |
| INR | Not Assigned Prefix |
| INS | Wellmark BCBS |
| INT | BCBS Alabama |
| INU | BCBS South Carolina |
| INV | Not Assigned Prefix |
| INW | Independence Blue Cross |
| INX | Not Assigned Prefix |
| INY | Anthem Blue Cross California |
| INZ | Not Assigned Prefix |
| IOA | BCBS Arizona |
| IOB | Not Assigned Prefix |
| IOD | Not Assigned Prefix |
| IOE | Empire BCBS New York |
| IOK | Anthem BCBS Virginia |
| ION | BCBS Florida |
| IOP | Not Assigned Prefix |
| IOQ | Not Assigned Prefix |
| IOS | BCBS Louisiana |
| IOT | Highmark BCBS |
| IOV | Not Assigned Prefix |
| IOZ | Not Assigned Prefix |
| IPA | Highmark BCBS |
| IPB | Not Assigned Prefix |
| IPD | Not Assigned Prefix |
| IPE | Blue Shield California |
| IPF | Wellmark BCBS |
| IPG | Anthem BCBS Virginia |
| IPH | BCBS Kansas |
| IPK | Not Assigned Prefix |
| IPM | Highmark BCBS |
| IPN | Highmark BCBS |
| IPP | BCBS Alabama |
| IPR | Wellmark BCBS |
| IPS | Blue Shield California |
| IPT | BCBS Illinois |
| IPU | Blue Cross Idaho |
| IPV | BCBS Michigan |
| IPW | Regence Blue Shield Idaho |
| IQA | Premera Blue Cross |
| IQC | Not Assigned Prefix |
| IQE | BCBS Tennessee |
| IQH | Not Assigned Prefix |
| IQM | Not Assigned Prefix |
| IQT | Not Assigned Prefix |
| IQU | BCBS Michigan |
| IQV | Anthem Blue Cross California |
| IQW | Anthem Blue Cross California |
| IQX | Anthem Blue Cross California |
| IQZ | Horizon BCBS New Jersey |
| IRA | Horizon BCBS New Jersey |
| IRD | BCBS Massachusetts |
| IRE | Not Assigned Prefix |
| IRG | Not Assigned Prefix |
| IRM | Not Assigned Prefix |
| IRO | Not Assigned Prefix |
| IRP | BCBS Florida |
| IRS | BCBS Florida |
| IRT | Not Assigned Prefix |
| IRU | Anthem Central Region (OH, IN, KY) |
| IRX | Not Assigned Prefix |
| IRZ | Anthem Blue Cross California |
| ISA | Anthem Central Region (OH, IN, KY) |
| ISB | Premera Blue Cross |
| ISC | Horizon BCBS New Jersey |
| ISD | Not Assigned Prefix |
| ISE | Not Assigned Prefix |
| ISF | Not Assigned Prefix |
| ISG | Anthem Central Region (OH, IN, KY) |
| ISH | Carefirst BCBS Maryland |
| ISI | Anthem Blue Cross California |
| ISJ | Not Assigned Prefix |
| ISK | Carefirst BCBS Maryland |
| ISL | Wellmark BCBS |
| ISM | Highmark BCBS |
| ISP | Blue Cross Idaho |
| ISQ | Not Assigned Prefix |
| ISR | Carefirst BCBS Maryland |
| ISS | Horizon BCBS New Jersey |
| IST | Blue Cross Idaho |
| ISV | BCBS Michigan |
| ISX | Wellmark BCBS |
| ISY | Not Assigned Prefix |
| ISZ | Not Assigned Prefix |
| ITA | Carefirst BCBS Maryland |
| ITB | Wellmark BCBS |
| ITC | BCBS Massachusetts |
| ITD | Not Assigned Prefix |
| ITE | BCBS North Carolina |
| ITF | BCBS Michigan |
| ITG | Not Assigned Prefix |
| ITL | BCBS Illinois |
| ITM | BCBS Michigan |
| ITP | Anthem Central Region (OH, IN, KY) |
| ITQ | Wellmark BCBS |
| ITR | Empire BCBS New York |
| ITS | BCBS Arkansas Blue Advantage |
| ITT | Anthem Blue Cross California |
| ITU | Not Assigned Prefix |
| ITV | Regence BCBS Washington |
| ITW | BCBS Illinois |
| ITY | Regence BCBS Washington |
| IUA | Wellmark BCBS |
| IUB | Anthem Central Region (OH, IN, KY) |
| IUC | Not Assigned Prefix |
| IUE | Empire BCBS New York |
| IUF | Anthem Central Region (OH, IN, KY) |
| IUG | Premera Blue Cross |
| IUH | BCBS Massachusetts |
| IUK | BCBS South Carolina |
| IUL | Carefirst BCBS Maryland |
| IUM | Not Assigned Prefix |
| IUO | Anthem Central Region (OH, IN, KY) |
| IUP | Anthem Taft Hartley National Account |
| IUQ | Carefirst BCBS Maryland |
| IUR | Independence Blue Cross |
| IUS | Not Assigned Prefix |
| IUU | Anthem Central Region (OH, IN, KY) |
| IUW | Anthem Central Region (OH, IN, KY) |
| IUX | Not Assigned Prefix |
| IUZ | Empire BCBS New York |
| IVB | BCBS Michigan |
| IVD | Not Assigned Prefix |
| IVG | Not Assigned Prefix |
| IVJ | Anthem |
| IVK | BCBS Mississippi |
| IVL | Not Assigned Prefix |
| IVM | Not Assigned Prefix |
| IVO | Horizon BCBS New Jersey |
| IVP | BCBS Michigan |
| IVR | Not Assigned Prefix |
| IVS | Anthem Blue Cross California |
| IVT | Regence BCBS Oregon |
| IVU | Not Assigned Prefix |
| IVW | Anthem Central Region (OH, IN, KY) |
| IVY | Not Assigned Prefix |
| IVZ | Anthem Central Region (OH, IN, KY) |
| IWA | Anthem |
| IWB | BCBS Nebraska |
| IWD | Carefirst BCBS Maryland |
| IWE | Wellmark BCBS |
| IWG | Excellus BCBS New York |
| IWH | Carefirst BCBS Maryland |
| IWJ | Anthem |
| IWK | BCBS Michigan |
| IWL | Not Assigned Prefix |
| IWM | Blue Shield Northeastern New York |
| IWN | Anthem Central Region (OH, IN, KY) |
| IWO | Anthem Central Region (OH, IN, KY) |
| IWP | BCBS Michigan |
| IWS | Wellmark BCBS |
| IWT | Capital Blue Cross |
| IWU | Anthem BCBS Virginia |
| IWV | BCBS Kansas City |
| IWW | Not Assigned Prefix |
| IWY | Empire BCBS New York |
| IWZ | BCBS Michigan |
| IXA | Not Assigned Prefix |
| IXB | Not Assigned Prefix |
| IXC | Not Assigned Prefix |
| IXD | Anthem Blue Cross California |
| IXE | Anthem Central Region (OH, IN, KY) |
| IXF | Anthem Central Region (OH, IN, KY) |
| IXG | Anthem Central Region (OH, IN, KY) |
| IXH | Anthem Central Region (OH, IN, KY) |
| IXI | Not Assigned Prefix |
| IXJ | Anthem Central Region (OH, IN, KY) |
| IXK | Anthem Central Region (OH, IN, KY) |
| IXN | Anthem Central Region (OH, IN, KY) |
| IXP | Not Assigned Prefix |
| IXR | Not Assigned Prefix |
| IXT | Anthem Blue Cross California |
| IXU | Independence Blue Cross |
| IXW | BCBS Michigan |
| IXX | Anthem Central Region (OH, IN, KY) |
| IXY | Anthem Central Region (OH, IN, KY) |
| IYC | Independence Blue Cross |
| IYE | Not Assigned Prefix |
| IYF | Anthem Central Region (OH, IN, KY) |
| IYH | Anthem |
| IYO | Not Assigned Prefix |
| IYP | Not Assigned Prefix |
| IYQ | Not Assigned Prefix |
| IYS | Not Assigned Prefix |
| IYT | Not Assigned Prefix |
| IZA | BCBS Alabama |
| IZC | Anthem Central Region (OH, IN, KY) |
| IZD | Not Assigned Prefix |
| IZE | Carefirst BCBS Maryland |
| IZO | Not Assigned Prefix |
| IZP | Blue Cross Idaho |
| IZQ | Not Assigned Prefix |
| IZS | BCBS Michigan |
| IZU | Wellmark BCBS |
| IZZ | Anthem Blue Cross California |
| ISU | Blue Cross Idaho |
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