| BCBS Alpha Prefix List of “I”-series | Blue Cross Blue Shield insurance Companies – Statewise |
| IAA | Prefix yet to assign |
| IAB | Prefix yet to assign |
| IAD | Prefix yet to assign |
| IAF | Prefix yet to assign |
| IAG | Anthem BCBS Virginia |
| IAI | BCBS South Carolina |
| IAJ | Prefix yet to assign |
| IAK | Prefix yet to assign |
| IAL | Wellmark BCBS |
| IAM | Blue Shield California |
| IAP | Wellmark BCBS |
| IAQ | BCBS Nebraska |
| IAR | BCBS Alabama |
| IAS | Prefix yet to assign |
| IAT | Empire BCBS New York |
| IAU | BCBS Nebraska |
| IAV | Wellmark BCBS |
| IAW | Wellmark BCBS |
| IAX | Prefix yet to assign |
| IAY | BCBS South Carolina |
| IAZ | Prefix yet to assign |
| 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 | Prefix yet to assign |
| IBL | Prefix yet to assign |
| IBM | Prefix yet to assign |
| IBN | Prefix yet to assign |
| IBO | Prefix yet to assign |
| IBP | Wellmark BCBS |
| IBR | BCBS Michigan |
| IBT | BCBS Illinois |
| IBU | BCBS Alabama |
| IBV | Prefix yet to assign |
| IBW | BCBS Illinois |
| IBY | Anthem Central Region (OH, IN, KY) |
| IBZ | Prefix yet to assign |
| 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 | Prefix yet to assign |
| ICJ | BCBS Georgia |
| ICK | Carefirst BCBS Maryland |
| ICL | Carefirst BCBS Maryland |
| ICM | Prefix yet to assign |
| ICN | BCBS Georgia |
| ICO | Prefix yet to assign |
| 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 | Prefix yet to assign |
| ICY | Anthem Central Region (OH, IN, KY) |
| ICZ | Carefirst BCBS Maryland |
| IDA | Blue Cross Idaho |
| IDB | Prefix yet to assign |
| IDC | Prefix yet to assign |
| IDD | Anthem BCBS Virginia |
| IDG | Carefirst BCBS Maryland |
| IDH | Prefix yet to assign |
| IDJ | Anthem BCBS Virginia |
| IDK | Prefix yet to assign |
| IDL | Prefix yet to assign |
| IDN | Prefix yet to assign |
| IDO | Prefix yet to assign |
| IDP | Blue Cross Idaho |
| IDQ | Prefix yet to assign |
| IDR | Anthem Blue Cross California |
| IDS | Prefix yet to assign |
| IDT | Prefix yet to assign |
| IDU | Prefix yet to assign |
| IDW | Anthem Central Region (OH, IN, KY) |
| IDX | BCBS Illinois |
| IDY | Prefix yet to assign |
| IDZ | Carefirst BCBS Maryland |
| IEA | Prefix yet to assign |
| IEB | Anthem |
| IEC | Blue Shield California |
| IED | Anthem Central Region (OH, IN, KY) |
| IEF | Prefix yet to assign |
| IEG | Carefirst BCBS Maryland |
| IEH | Premera Blue Cross |
| IEL | BCBS Illinois |
| IEM | Prefix yet to assign |
| IEN | Prefix yet to assign |
| IEP | BCBS Louisiana |
| IEQ | Anthem Central Region (OH, IN, KY) |
| IER | Prefix yet to assign |
| IES | BCBS Texas |
| IET | Prefix yet to assign |
| IEU | BCBS Louisiana |
| IEV | BCBS Alabama |
| IEW | BCBS Illinois |
| IEX | Prefix yet to assign |
| IFA | Prefix yet to assign |
| IFB | Wellmark BCBS |
| IFC | BCBS Western New York |
| IFD | Prefix yet to assign |
| IFE | Prefix yet to assign |
| IFF | Wellmark BCBS |
| IFG | Anthem Central Region (OH, IN, KY) |
| IFH | Prefix yet to assign |
| IFI | Prefix yet to assign |
| IFL | Regence Blue Cross Blue Shield Oregon |
| IFP | Prefix yet to assign |
| IFQ | Carefirst BCBS Maryland |
| IFR | Anthem Central Region (OH, IN, KY) |
| IFS | BCBS Kansas City |
| IFW | Prefix yet to assign |
| IFX | Prefix yet to assign |
| IFY | Carefirst BCBS Maryland |
| IGB | BCBS Georgia |
| IGC | Carefirst Administrators |
| IGD | Wellmark BCBS |
| IGH | Prefix yet to assign |
| IGI | Wellmark BCBS |
| IGK | Prefix yet to assign |
| IGL | Prefix yet to assign |
| IGN | Prefix yet to assign |
| IGP | Wellmark BCBS |
| IGR | Prefix yet to assign |
| IGS | BCBS Alabama |
| IGT | Blue Shield California |
| IGV | Prefix yet to assign |
| IGW | Carefirst BCBS Maryland |
| IGX | Carefirst BCBS Maryland |
| IGY | Carefirst BCBS Maryland |
| IGZ | Prefix yet to assign |
| 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 | Prefix yet to assign |
| IHH | BCBS Alabama |
| IHK | Prefix yet to assign |
| IHL | Prefix yet to assign |
| IHM | Prefix yet to assign |
| IHN | Prefix yet to assign |
| IHP | Carefirst BCBS Maryland |
| IHQ | Prefix yet to assign |
| IHR | Prefix yet to assign |
| IHS | Prefix yet to assign |
| 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 | Prefix yet to assign |
| IJK | Prefix yet to assign |
| IJM | Prefix yet to assign |
| IJO | Prefix yet to assign |
| IJP | Prefix yet to assign |
| IJR | Blue Cross Idaho |
| IJS | Anthem Central Region (OH, IN, KY) |
| IJU | BCBS Texas |
| IJW | Horizon BCBS New Jersey |
| IJX | Prefix yet to assign |
| IKA | Prefix yet to assign |
| IKB | Prefix yet to assign |
| IKC | Prefix yet to assign |
| IKD | Wellmark BCBS |
| IKE | Independence Blue Cross |
| IKF | Independence Blue Cross |
| IKH | Wellmark BCBS |
| IKI | Prefix yet to assign |
| IKL | Anthem BCBS Virginia |
| IKM | Independence Blue Cross |
| IKN | Prefix yet to assign |
| IKO | Prefix yet to assign |
| IKP | Prefix yet to assign |
| IKQ | Wellmark BCBS |
| IKT | Blue Cross Idaho |
| IKZ | Prefix yet to assign |
| ILA | Prefix yet to assign |
| ILB | BCBS Massachusetts |
| ILC | Wellmark BCBS |
| ILD | BCBS Michigan |
| ILF | Prefix yet to assign |
| 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 | Prefix yet to assign |
| ILR | Anthem Central Region (OH, IN, KY) |
| ILS | Premera Blue Cross |
| ILT | BCBS Illinois |
| ILU | Anthem Blue Cross California |
| ILW | Prefix yet to assign |
| ILY | Anthem Blue Cross California |
| IMA | Excellus BCBS New York |
| IMB | Prefix yet to assign |
| IMC | Premera Blue Cross |
| IMD | Anthem |
| IME | Prefix yet to assign |
| IMF | Prefix yet to assign |
| IMG | Anthem Blue Cross California |
| IMI | Wellmark BCBS |
| IMM | Anthem BCBS Nevada |
| IMO | Prefix yet to assign |
| IMP | BCBS Alabama |
| IMQ | Prefix yet to assign |
| IMR | Prefix yet to assign |
| IMU | Prefix yet to assign |
| IMV | Prefix yet to assign |
| IMW | Prefix yet to assign |
| IMY | Prefix yet to assign |
| IMZ | Prefix yet to assign |
| INA | Prefix yet to assign |
| INB | Premera Blue Cross |
| INC | Anthem Blue Cross California |
| IND | Anthem BCBS Virginia |
| INE | BCBS South Carolina |
| INF | Blue Shield California |
| ING | Prefix yet to assign |
| INH | Regence Blue Cross Blue Shield Utah |
| INI | BCBS Delaware |
| INJ | Prefix yet to assign |
| INM | Prefix yet to assign |
| INO | Blue Shield California |
| INQ | Prefix yet to assign |
| INR | Prefix yet to assign |
| INS | Wellmark BCBS |
| INT | BCBS Alabama |
| INU | BCBS South Carolina |
| INV | Prefix yet to assign |
| INW | Independence Blue Cross |
| INX | Prefix yet to assign |
| INY | Anthem Blue Cross California |
| INZ | Prefix yet to assign |
| IOA | BCBS Arizona |
| IOB | Prefix yet to assign |
| IOD | Prefix yet to assign |
| IOE | Empire BCBS New York |
| IOK | Anthem BCBS Virginia |
| ION | BCBS Florida |
| IOP | Prefix yet to assign |
| IOQ | Prefix yet to assign |
| IOS | BCBS Louisiana |
| IOT | Highmark BCBS |
| IOV | Prefix yet to assign |
| IOZ | Prefix yet to assign |
| IPA | Highmark BCBS |
| IPB | Prefix yet to assign |
| IPD | Prefix yet to assign |
| IPE | Blue Shield California |
| IPF | Wellmark BCBS |
| IPG | Anthem BCBS Virginia |
| IPH | BCBS Kansas |
| IPK | Prefix yet to assign |
| 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 | Prefix yet to assign |
| IQE | BCBS Tennessee |
| IQH | Prefix yet to assign |
| IQM | Prefix yet to assign |
| IQT | Prefix yet to assign |
| 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 | Prefix yet to assign |
| IRG | Prefix yet to assign |
| IRM | Prefix yet to assign |
| IRO | Prefix yet to assign |
| IRP | BCBS Florida |
| IRS | BCBS Florida |
| IRT | Prefix yet to assign |
| IRU | Anthem Central Region (OH, IN, KY) |
| IRX | Prefix yet to assign |
| IRZ | Anthem Blue Cross California |
| ISA | Anthem Central Region (OH, IN, KY) |
| ISB | Premera Blue Cross |
| ISC | Horizon BCBS New Jersey |
| ISD | Prefix yet to assign |
| ISE | Prefix yet to assign |
| ISF | Prefix yet to assign |
| ISG | Anthem Central Region (OH, IN, KY) |
| ISH | Carefirst BCBS Maryland |
| ISI | Anthem Blue Cross California |
| ISJ | Prefix yet to assign |
| ISK | Carefirst BCBS Maryland |
| ISL | Wellmark BCBS |
| ISM | Highmark BCBS |
| ISP | Blue Cross Idaho |
| ISQ | Prefix yet to assign |
| ISR | Carefirst BCBS Maryland |
| ISS | Horizon BCBS New Jersey |
| IST | Blue Cross Idaho |
| ISV | BCBS Michigan |
| ISX | Wellmark BCBS |
| ISY | Prefix yet to assign |
| ISZ | Prefix yet to assign |
| ITA | Carefirst BCBS Maryland |
| ITB | Wellmark BCBS |
| ITC | BCBS Massachusetts |
| ITD | Prefix yet to assign |
| ITE | BCBS North Carolina |
| ITF | BCBS Michigan |
| ITG | Prefix yet to assign |
| 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 | Prefix yet to assign |
| ITV | Regence BCBS Washington |
| ITW | BCBS Illinois |
| ITY | Regence BCBS Washington |
| IUA | Wellmark BCBS |
| IUB | Anthem Central Region (OH, IN, KY) |
| IUC | Prefix yet to assign |
| 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 | Prefix yet to assign |
| IUO | Anthem Central Region (OH, IN, KY) |
| IUP | Anthem Taft Hartley National Account |
| IUQ | Carefirst BCBS Maryland |
| IUR | Independence Blue Cross |
| IUS | Prefix yet to assign |
| IUU | Anthem Central Region (OH, IN, KY) |
| IUW | Anthem Central Region (OH, IN, KY) |
| IUX | Prefix yet to assign |
| IUZ | Empire BCBS New York |
| IVB | BCBS Michigan |
| IVD | Prefix yet to assign |
| IVG | Prefix yet to assign |
| IVJ | Anthem |
| IVK | BCBS Mississippi |
| IVL | Prefix yet to assign |
| IVM | Prefix yet to assign |
| IVO | Horizon BCBS New Jersey |
| IVP | BCBS Michigan |
| IVR | Prefix yet to assign |
| IVS | Anthem Blue Cross California |
| IVT | Regence BCBS Oregon |
| IVU | Prefix yet to assign |
| IVW | Anthem Central Region (OH, IN, KY) |
| IVY | Prefix yet to assign |
| 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 | Prefix yet to assign |
| 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 | Prefix yet to assign |
| IWY | Empire BCBS New York |
| IWZ | BCBS Michigan |
| IXA | Prefix yet to assign |
| IXB | Prefix yet to assign |
| IXC | Prefix yet to assign |
| 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 | Prefix yet to assign |
| IXJ | Anthem Central Region (OH, IN, KY) |
| IXK | Anthem Central Region (OH, IN, KY) |
| IXN | Anthem Central Region (OH, IN, KY) |
| IXP | Prefix yet to assign |
| IXR | Prefix yet to assign |
| 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 | Prefix yet to assign |
| IYF | Anthem Central Region (OH, IN, KY) |
| IYH | Anthem |
| IYO | Prefix yet to assign |
| IYP | Prefix yet to assign |
| IYQ | Prefix yet to assign |
| IYS | Prefix yet to assign |
| IYT | Prefix yet to assign |
| IZA | BCBS Alabama |
| IZC | Anthem Central Region (OH, IN, KY) |
| IZD | Prefix yet to assign |
| IZE | Carefirst BCBS Maryland |
| IZO | Prefix yet to assign |
| IZP | Blue Cross Idaho |
| IZQ | Prefix yet to assign |
| IZS | BCBS Michigan |
| IZU | Wellmark BCBS |
| IZZ | Anthem Blue Cross California |
| ISU | Blue Cross Idaho |
