| Prefix | Plan Name | |
|---|---|---|
| I2A | Blue Shield of California | |
| I2C | Anthem BCBS of Colorado | |
| I2F | Blue Cross of California | |
| I2I | Blue Cross of California | |
| I2P | Regence BCBS | |
| I2T | Regence BCBS | |
| I2V | Anthem Blue Cross of California | |
| I2W | Regence BCBS | |
| I3H | Blue Cross Blue Shield of Alabama | |
| I3L | Capital Blue Cross | |
| I3T | Anthem BCBS of Virginia | |
| I3W | Regence BCBS | |
| I4A | Anthem BCBS of Virginia | |
| IAA | Anthem BCBS of Wisconsin | |
| IAB | Wellmark BCBS | |
| IAC | Regence BCBS | |
| IAD | Anthem BCBS of Indiana | |
| IAE | Blue Cross Blue Shield of Michigan | |
| IAF | BCBS of Western New York | |
| IAG | Anthem BCBS of Virginia | |
| IAH | Wellmark BCBS | |
| IAI | Blue Cross Blue Shield of South Carolina | |
| IAJ | CareFirst BCBS | |
| IAK | Blue Shield of California | |
| IAL | Wellmark BCBS | |
| IAM | Blue Shield of California | |
| IAN | Unassigned | |
| IAO | BCBS of Western New York | |
| IAP | Wellmark BCBS | |
| IAQ | Blue Cross Blue Shield of Nebraska | |
| IAR | Blue Cross Blue Shield of Alabama | |
| IAS | Blue Cross Blue Shield of Massachusetts | |
| IAT | Empire Blue Cross Blue Shield | |
| IAU | Blue Cross Blue Shield of Nebraska | |
| IAV | Wellmark BCBS | |
| IAW | Wellmark BCBS | |
| IAX | Wellmark BCBS | |
| IAY | Blue Cross Blue Shield of South Carolina | |
| IAZ | Wellmark BCBS | |
| IBA | Blue Cross Blue Shield of Illinois | |
| IBB | Horizon BCBS of New Jersey | |
| IBC | Anthem BCBS of Wisconsin | |
| IBD | Anthem BCBS of Wisconsin | |
| IBE | Blue Cross Blue Shield of Illinois | |
| IBF | Wellmark BCBS | |
| IBG | Blue Cross Blue Shield of Illinois | |
| IBH | Blue Cross Blue Shield of Alabama | |
| IBI | Wellmark BCBS | |
| IBJ | Blue Cross Blue Shield of Michigan | |
| IBK | Blue Cross of California | |
| IBL | Independence Blue Cross FOC | |
| IBM | Blue Shield of California | |
| IBN | Unassigned | |
| IBO | Independence Blue Cross FOC | |
| IBP | Wellmark BCBS | |
| IBQ | Regence BCBS | |
| IBR | Blue Cross Blue Shield of Michigan | |
| IBS | Anthem BCBS of Georgia | |
| IBT | Blue Cross Blue Shield of Illinois | |
| IBU | Blue Cross Blue Shield of Alabama | |
| IBV | Blue Cross Blue Shield of Massachusetts | |
| IBW | Blue Cross Blue Shield of Illinois | |
| IBX | Blue Cross of California | |
| IBY | Unassigned | |
| IBZ | Regence BCBS | |
| ICA | CareFirst BCBS | |
| ICB | Blue Cross Blue Shield of Illinois | |
| ICC | Anthem BCBS of Colorado | |
| ICD | CareFirst BCBS | |
| ICE | CareFirst BCBS | |
| ICF | CareFirst BCBS | |
| ICG | Blue Cross Blue Shield of South Carolina | |
| ICH | Anthem BCBS of Virginia | |
| ICI | Blue Cross Blue Shield of South Carolina | |
| ICJ | Anthem BCBS of Georgia | |
| ICK | CareFirst BCBS | |
| ICL | CareFirst BCBS | |
| ICM | Blue Shield of California | |
| ICN | Anthem BCBS of Georgia | |
| ICO | Blue Cross Blue Shield of North Carolina | |
| ICP | Anthem BCBS of Georgia | |
| ICQ | Anthem BCBS of Virginia | |
| ICR | Anthem BCBS of Ohio | |
| ICS | Anthem BCBS of Missouri | |
| ICT | BCBS of Western New York | |
| ICU | Regence BCBS | |
| ICV | Blue Cross Blue Shield of Michigan | |
| ICW | Blue Cross Blue Shield of Massachusetts | |
| ICX | Anthem BCBS of Wisconsin | |
| ICY | Anthem BCBS of Ohio | |
| ICZ | CareFirst BCBS | |
| IDA | Blue Cross of Idaho | |
| IDB | Blue Cross Blue Shield of South Carolina | |
| IDC | Blue Cross of California | |
| IDD | Anthem BCBS of Virginia | |
| IDE | Blue Cross of Idaho | |
| IDF | Blue Cross of Idaho | |
| IDG | CareFirst BCBS | |
| IDH | Highmark BCBS of Pennsylvania | |
| IDI | Blue Shield of California |
| IDJ | Anthem BCBS of Virginia | |
| IDK | Empire Blue Cross Blue Shield | |
| IDL | Blue Cross of Idaho | |
| IDM | Blue Cross of Idaho | |
| IDN | Blue Cross of Idaho | |
| IDO | Blue Cross Blue Shield of South Carolina | |
| IDP | Blue Cross of Idaho | |
| IDQ | Anthem BCBS of Virginia | |
| IDR | Blue Cross of California | |
| IDS | Blue Cross Blue Shield of South Carolina | |
| IDT | Anthem BCBS of Virginia | |
| IDU | Blue Cross Blue Shield of South Carolina | |
| IDV | Blue Cross of Idaho | |
| IDW | Unassigned | |
| IDX | Blue Cross Blue Shield of Illinois | |
| IDY | Blue Cross Blue Shield of South Carolina | |
| IDZ | Wellmark BCBS | |
| IEA | Regence BCBS | |
| IEB | Anthem BCBS of Indiana | |
| IEC | Blue Shield of California | |
| IED | Anthem BCBS of Indiana | |
| IEE | Unassigned | |
| IEF | Blue Cross Blue Shield of Massachusetts | |
| IEG | CareFirst BCBS | |
| IEH | Premera Blue Cross | |
| IEI | Independence Blue Cross FOC | |
| IEJ | Blue Cross Blue Shield of South Carolina | |
| IEK | CareFirst BCBS | |
| IEL | Blue Cross Blue Shield of Illinois | |
| IEM | Blue Shield of Northeastern New York | |
| IEN | Blue Cross of California | |
| IEO | Blue Cross Blue Shield of South Carolina | |
| IEP | Blue Cross Blue Shield of Louisiana | |
| IEQ | Empire Blue Cross Blue Shield | |
| IER | Anthem BCBS of Virginia | |
| IES | Blue Cross Blue Shield of Texas | |
| IET | Anthem BCBS of Connecticut | |
| IEU | Blue Cross Blue Shield of Louisiana | |
| IEV | Blue Cross Blue Shield of Alabama | |
| IEW | Blue Cross Blue Shield of Illinois | |
| IEX | Blue Cross Blue Shield of Michigan | |
| IEY | Blue Cross Blue Shield of South Carolina | |
| IEZ | CareFirst BCBS | |
| IFA | Anthem BCBS of Georgia | |
| IFB | Wellmark BCBS | |
| IFC | BCBS of Western New York | |
| IFD | Regence BCBS | |
| IFE | Anthem BCBS of Georgia | |
| IFF | Wellmark BCBS | |
| IFG | Unassigned | |
| IFH | Highmark BCBS of Pennsylvania | |
| IFI | Highmark BCBS of Pennsylvania | |
| IFJ | Highmark BCBS of Pennsylvania | |
| IFK | Highmark BCBS of Pennsylvania | |
| IFL | Regence BCBS | |
| IFM | Blue Cross of California | |
| IFN | Highmark BCBS of Pennsylvania | |
| IFO | Highmark BCBS of Pennsylvania | |
| IFP | Anthem BCBS of Nevada | |
| IFQ | CareFirst BCBS | |
| IFR | Anthem BCBS of Kentucky | |
| IFS | Blue Cross Blue Shield of Kansas City | |
| IFT | Highmark BCBS of Pennsylvania | |
| IFU | Highmark BCBS of Pennsylvania | |
| IFV | Highmark BCBS of Pennsylvania | |
| IFW | Highmark BCBS of Pennsylvania | |
| IFX | Anthem BCBS of Ohio | |
| IFY | CareFirst BCBS | |
| IFZ | Blue Cross Blue Shield of South Carolina | |
| IGA | Independence Blue Cross FOC | |
| IGB | Anthem BCBS of Georgia | |
| IGC | CareFirst BCBS | |
| IGD | Wellmark BCBS | |
| IGE | Blue Cross Blue Shield of Alabama | |
| IGF | Blue Shield of California | |
| IGG | Blue Shield of California | |
| IGH | Independence Blue Cross FOC | |
| IGI | Wellmark BCBS | |
| IGJ | Independence Blue Cross FOC | |
| IGK | Highmark BCBS of Pennsylvania | |
| IGL | Highmark BCBS of Pennsylvania | |
| IGM | CareFirst BCBS | |
| IGN | Highmark BCBS of Pennsylvania | |
| IGO | BCBS of Western New York | |
| IGP | Wellmark BCBS | |
| IGQ | Highmark BCBS of Pennsylvania | |
| IGR | Empire Blue Cross Blue Shield | |
| IGS | Blue Cross Blue Shield of Alabama | |
| IGT | Blue Shield of California | |
| IGU | Blue Cross Blue Shield of Louisiana | |
| IGV | Highmark BCBS of Pennsylvania | |
| IGW | CareFirst BCBS | |
| IGX | CareFirst BCBS | |
| IGY | CareFirst BCBS | |
| IGZ | Highmark BCBS of Pennsylvania | |
| IHA | Blue Shield of California | |
| IHB | Wellmark BCBS | |
| IHC | CareFirst BCBS | |
| IHD | Blue Cross Blue Shield of Nebraska | |
| IHE | Anthem BCBS of Ohio |
| IHF | Empire Blue Cross Blue Shield | |
| IHG | Anthem BCBS of Georgia | |
| IHH | Blue Cross Blue Shield of Alabama | |
| IHI | Highmark BCBS of Pennsylvania | |
| IHJ | Empire Blue Cross Blue Shield | |
| IHK | Highmark BCBS of Pennsylvania | |
| IHL | Highmark BCBS of Pennsylvania | |
| IHM | Highmark BCBS of Pennsylvania | |
| IHN | Blue Shield of California | |
| IHO | Blue Cross Blue Shield of South Carolina | |
| IHP | CareFirst BCBS | |
| IHQ | Blue Cross Blue Shield of South Carolina | |
| IHR | Blue Shield of California | |
| IHS | Blue Cross Blue Shield of Massachusetts | |
| IHT | Blue Cross Blue Shield of Alabama | |
| IHU | Unassigned | |
| IHV | Anthem BCBS of Georgia | |
| IHW | Blue Shield of California | |
| IHX | Anthem BCBS of Colorado | |
| IHY | Anthem BCBS of Georgia | |
| IHZ | Blue Cross of California | |
| IIA | Blue Shield of California | |
| IIB | Blue Cross Blue Shield of Michigan | |
| IIC | Horizon BCBS of New Jersey | |
| IID | Blue Cross of Idaho | |
| IIE | Highmark BCBS of Pennsylvania | |
| IIF | Anthem BCBS of Georgia | |
| IIG | Highmark BCBS of Pennsylvania | |
| IIH | Regence BCBS | |
| III | Blue Cross Blue Shield of Tennessee Commercial | |
| IIJ | Highmark BCBS of Pennsylvania | |
| IIK | Highmark BCBS of Pennsylvania | |
| IIL | Highmark BCBS of Pennsylvania | |
| IIM | Highmark BCBS of Pennsylvania | |
| IIN | Blue Cross Blue Shield of Massachusetts | |
| IIO | Unassigned | |
| IIP | BCBS of Western New York | |
| IIQ | Blue Cross Blue Shield of South Carolina | |
| IIR | Blue Cross Blue Shield of South Carolina | |
| IIS | Blue Cross Blue Shield of Michigan | |
| IIT | Blue Cross Blue Shield of Illinois | |
| IIU | Independence Blue Cross FOC | |
| IIV | Blue Cross Blue Shield of South Carolina | |
| IIW | Blue Shield of California | |
| IIX | Blue Cross of Idaho | |
| IIY | Blue Cross Blue Shield of South Carolina | |
| IIZ | Blue Cross Blue Shield of South Carolina | |
| IJA | Anthem BCBS of Wisconsin | |
| IJB | Anthem BCBS of Ohio | |
| IJC | Blue Cross Blue Shield of South Carolina | |
| IJD | Anthem BCBS of New Hampshire | |
| IJE | BCBS of Western New York | |
| IJF | Anthem BCBS of Georgia | |
| IJG | Anthem BCBS of Georgia | |
| IJH | Anthem BCBS of Georgia | |
| IJI | Anthem BCBS of Georgia | |
| IJJ | Anthem BCBS of Georgia | |
| IJK | Anthem BCBS of Georgia | |
| IJL | Anthem BCBS of Georgia | |
| IJM | Blue Cross Blue Shield of South Carolina | |
| IJN | Blue Cross Blue Shield of South Carolina | |
| IJO | Blue Cross Blue Shield of South Carolina | |
| IJP | Blue Cross Blue Shield of South Carolina | |
| IJQ | Anthem BCBS of Georgia | |
| IJR | Blue Cross of Idaho | |
| IJS | Anthem BCBS of Wisconsin | |
| IJT | Anthem BCBS of Georgia | |
| IJU | Blue Cross Blue Shield of Texas | |
| IJV | Anthem BCBS of Georgia | |
| IJW | Horizon BCBS of New Jersey | |
| IJX | Anthem BCBS of Georgia | |
| IJY | Capital Blue Cross | |
| IJZ | Blue Cross Blue Shield of South Carolina | |
| IKA | Anthem BCBS of Kentucky | |
| IKB | Anthem BCBS of Virginia | |
| IKC | Anthem BCBS of Virginia | |
| IKD | Wellmark BCBS | |
| IKE | Independence Blue Cross FOC | |
| IKF | Independence Blue Cross FOC | |
| IKG | Anthem BCBS of Georgia | |
| IKH | Wellmark BCBS | |
| IKI | Blue Cross Blue Shield of South Carolina | |
| IKJ | Blue Cross Blue Shield of South Carolina | |
| IKK | Blue Cross Blue Shield of Michigan | |
| IKL | Anthem BCBS of Virginia | |
| IKM | Independence Blue Cross FOC | |
| IKN | Unassigned | |
| IKO | Highmark BCBS of Pennsylvania | |
| IKP | Unassigned | |
| IKQ | Wellmark BCBS | |
| IKR | Anthem BCBS of Missouri | |
| IKS | Blue Shield of California | |
| IKT | Anthem BCBS of Kentucky | |
| IKU | Anthem BCBS of Georgia | |
| IKV | Blue Cross Blue Shield of Michigan | |
| IKW | Anthem BCBS of Georgia | |
| IKX | Blue Cross Blue Shield of Michigan | |
| IKY | Blue Cross Blue Shield of South Carolina | |
| IKZ | Unassigned | |
| ILA | Empire Blue Cross Blue Shield |
| ILB | Blue Cross Blue Shield of Massachusetts | |
| ILC | Wellmark BCBS | |
| ILD | Blue Cross Blue Shield of Michigan | |
| ILE | Wellmark BCBS | |
| ILF | Blue Cross Blue Shield of Alabama | |
| ILG | Blue Shield of California | |
| ILH | Blue Cross of California | |
| ILI | Blue Shield of California | |
| ILJ | Anthem BCBS of Wisconsin | |
| ILK | Regence Group Administrators – Washington | |
| ILL | Blue Cross of California | |
| ILM | Blue Cross of California | |
| ILN | Blue Cross Blue Shield of Tennessee Commercial | |
| ILO | Anthem BCBS of Wisconsin | |
| ILP | Blue Cross Blue Shield of South Carolina | |
| ILQ | Blue Cross of California | |
| ILR | Unassigned | |
| ILS | Premera Blue Cross | |
| ILT | Blue Cross Blue Shield of Illinois | |
| ILU | Blue Cross of California | |
| ILV | BCBS of Alabama | |
| ILW | Blue Shield of California | |
| ILX | BCBS of Alabama | |
| ILY | Blue Cross of California | |
| ILZ | Blue Cross Blue Shield of Michigan | |
| IMA | Excellus BCBS | |
| IMB | Blue Cross Blue Shield of Massachusetts | |
| IMC | Premera Blue Cross | |
| IMD | Unassigned | |
| IME | Highmark BCBS of Pennsylvania | |
| IMF | Unassigned | |
| IMG | Blue Cross of California | |
| IMH | Anthem BCBS of Colorado | |
| IMI | Wellmark BCBS | |
| IMJ | Anthem BCBS of Missouri | |
| IMK | Anthem BCBS of Maine | |
| IML | Unassigned | |
| IMM | BCBS of Western New York | |
| IMN | Unassigned | |
| IMO | Blue Cross of California | |
| IMP | Blue Cross Blue Shield of Alabama | |
| IMQ | Blue Cross Blue Shield of Tennessee Commercial | |
| IMR | Blue Cross Blue Shield of Alabama | |
| IMS | Anthem BCBS of Kentucky | |
| IMT | Wellmark BCBS | |
| IMU | Blue Cross Blue Shield of South Carolina | |
| IMV | Blue Cross Blue Shield of Massachusetts | |
| IMW | Anthem BCBS of Ohio | |
| IMX | Anthem BCBS of Missouri | |
| IMY | Blue Cross Blue Shield of South Carolina | |
| IMZ | Wellmark BCBS | |
| INA | Anthem BCBS of Kentucky | |
| INB | Premera Blue Cross | |
| INC | Blue Cross of California | |
| IND | Anthem BCBS of Virginia | |
| INE | Blue Cross Blue Shield of South Carolina | |
| INF | Blue Shield of California | |
| ING | Anthem BCBS of Ohio | |
| INH | Unassigned | |
| INI | Highmark BCBS of Pennsylvania | |
| INJ | Anthem BCBS of Kentucky | |
| INK | Blue Cross of California | |
| INL | Blue Cross Blue Shield of Tennessee Commercial | |
| INM | Unassigned | |
| INN | Blue Cross Blue Shield of Nebraska | |
| INO | Blue Shield of California | |
| INP | Blue Cross Blue Shield of North Carolina | |
| INQ | Regence Group Administrators – Washington | |
| INR | Anthem BCBS of Indiana | |
| INS | Wellmark BCBS | |
| INT | Anthem BCBS of Virginia | |
| INU | Blue Cross Blue Shield of South Carolina | |
| INV | Blue Cross Blue Shield of South Carolina | |
| INW | Independence Blue Cross FOC | |
| INX | Blue Cross Blue Shield of North Carolina | |
| INY | Blue Cross of California | |
| INZ | Blue Shield of California | |
| IOA | Blue Cross Blue Shield of Arizona | |
| IOB | Blue Cross Blue Shield of Tennessee Commercial | |
| IOC | Blue Shield of California | |
| IOD | Blue Cross Blue Shield of Michigan | |
| IOE | Empire Blue Cross Blue Shield | |
| IOF | Blue Shield of California | |
| IOG | Blue Shield of Northeastern New York | |
| IOH | Unassigned | |
| IOI | Blue Cross Blue Shield of Michigan | |
| IOJ | Blue Cross Blue Shield of Michigan | |
| IOK | Anthem BCBS of Virginia | |
| IOL | Blue Cross Blue Shield of Michigan | |
| IOM | Blue Cross Blue Shield of Michigan | |
| ION | BCBS of Florida | |
| IOO | Blue Cross Blue Shield of Michigan | |
| IOP | BCBS of Western New York | |
| IOQ | Blue Cross Blue Shield of Michigan | |
| IOR | Blue Cross Blue Shield of South Carolina | |
| IOS | Blue Cross Blue Shield of North Carolina | |
| IOT | Highmark BCBS of Pennsylvania | |
| IOU | Blue Cross Blue Shield of South Carolina | |
| IOV | Blue Cross Blue Shield of South Carolina | |
| IOW | Unassigned |
| IOX | Anthem BCBS of Ohio | |
| IOY | Blue Cross Blue Shield of South Carolina | |
| IOZ | Blue Shield of California | |
| IPA | Anthem BCBS of Virginia | |
| IPB | Highmark BCBS of Pennsylvania | |
| IPC | Unassigned | |
| IPD | Highmark BCBS of Pennsylvania | |
| IPE | Blue Shield of California | |
| IPF | Wellmark BCBS | |
| IPG | Anthem BCBS of Virginia | |
| IPH | Blue Cross Blue Shield of Kansas | |
| IPI | Anthem BCBS of Georgia | |
| IPJ | Anthem BCBS of Georgia | |
| IPK | Blue Shield of California | |
| IPL | Unassigned | |
| IPM | Highmark BCBS of Pennsylvania | |
| IPN | Highmark BCBS of Pennsylvania | |
| IPO | Unassigned | |
| IPP | Blue Cross Blue Shield of Alabama | |
| IPQ | Anthem BCBS of Ohio | |
| IPR | Wellmark BCBS | |
| IPS | Blue Shield of California | |
| IPT | Blue Cross Blue Shield of Illinois | |
| IPU | Blue Cross of Idaho | |
| IPV | Blue Cross Blue Shield of Michigan | |
| IPW | Regence Blue Shield of Idaho | |
| IPX | Wellmark BCBS | |
| IPY | BCBS of Western New York | |
| IPZ | Blue Cross Blue Shield of Rhode Island | |
| IQA | Premera Blue Cross | |
| IQB | Anthem BCBS of Georgia | |
| IQC | Capital Blue Cross | |
| IQD | Anthem BCBS of Georgia | |
| IQE | Blue Cross Blue Shield of Tennessee Commercial | |
| IQF | Blue Cross Blue Shield of Tennessee Commercial | |
| IQG | Anthem BCBS of Indiana | |
| IQH | Anthem BCBS of Kentucky | |
| IQI | Anthem BCBS of Missouri | |
| IQJ | Anthem BCBS of Virginia | |
| IQK | Anthem BCBS of Georgia | |
| IQL | Blue Cross of California | |
| IQM | Anthem BCBS of Georgia | |
| IQN | Blue Cross Blue Shield of South Carolina | |
| IQO | Blue Cross of California | |
| IQP | Anthem BCBS of Georgia | |
| IQQ | Blue Cross of California | |
| IQR | Anthem BCBS of Georgia | |
| IQS | Independence Blue Cross FOC | |
| IQT | Anthem BCBS of Ohio | |
| IQU | Blue Cross Blue Shield of Michigan | |
| IQV | Blue Cross of California | |
| IQW | Blue Cross of California | |
| IQX | Blue Cross of California | |
| IQY | Blue Cross Blue Shield of South Carolina | |
| IQZ | Horizon BCBS of New Jersey | |
| IRA | Horizon BCBS of New Jersey | |
| IRB | Blue Cross Blue Shield of Massachusetts | |
| IRC | Anthem BCBS of Colorado | |
| IRD | Blue Cross Blue Shield of Massachusetts | |
| IRE | Independence Blue Cross FOC | |
| IRF | Blue Cross of California | |
| IRG | Blue Cross Blue Shield of South Carolina | |
| IRH | Anthem BCBS of Georgia | |
| IRI | Blue Cross Blue Shield of Rhode Island | |
| IRJ | Blue Cross Blue Shield of South Carolina | |
| IRK | BCBS of Alabama | |
| IRL | Unassigned | |
| IRM | Blue Cross Blue Shield of Kansas City | |
| IRN | Unassigned | |
| IRO | Anthem BCBS of Ohio | |
| IRP | BCBS of Florida | |
| IRQ | Blue Cross Blue Shield of South Carolina | |
| IRR | Anthem BCBS of Ohio | |
| IRS | BCBS of Florida | |
| IRT | Wellmark BCBS | |
| IRU | Anthem BCBS of Connecticut | |
| IRV | Blue Cross Blue Shield of Massachusetts | |
| IRW | Blue Shield of California | |
| IRX | Blue Cross Blue Shield of Massachusetts | |
| IRY | Independence Blue Cross FOC | |
| IRZ | Blue Cross of California | |
| ISA | Anthem BCBS of Ohio | |
| ISB | Premera Blue Cross | |
| ISC | Horizon BCBS of New Jersey | |
| ISD | Blue Cross Blue Shield of Arizona | |
| ISE | Anthem BCBS of Virginia | |
| ISF | Blue Cross Blue Shield of Arizona | |
| ISG | Unassigned | |
| ISH | CareFirst BCBS | |
| ISI | Blue Shield of California | |
| ISJ | Independence Blue Cross FOC | |
| ISK | CareFirst BCBS | |
| ISL | Wellmark BCBS | |
| ISM | Highmark BCBS of Pennsylvania | |
| ISN | Blue Cross of Idaho | |
| ISO | Blue Cross Blue Shield of Massachusetts | |
| ISP | Anthem BCBS of Wisconsin | |
| ISQ | Blue Cross Blue Shield of Kansas City | |
| ISR | CareFirst BCBS | |
| ISS | Horizon BCBS of New Jersey |
| IST | Anthem BCBS of Ohio | |
| ISU | Blue Cross of Idaho | |
| ISV | Blue Cross Blue Shield of Michigan | |
| ISW | Blue Cross of Idaho | |
| ISX | Wellmark BCBS | |
| ISY | Unassigned | |
| ISZ | Blue Cross of Idaho | |
| ITA | CareFirst BCBS | |
| ITB | Wellmark BCBS | |
| ITC | Blue Cross Blue Shield of Massachusetts | |
| ITD | Independence Blue Cross FOC | |
| ITE | Blue Cross Blue Shield of North Carolina | |
| ITF | Blue Cross Blue Shield of Michigan | |
| ITG | Anthem BCBS of Georgia | |
| ITH | Capital Blue Cross | |
| ITI | Anthem BCBS of Georgia | |
| ITJ | Blue Cross Blue Shield of Tennessee Commercial | |
| ITK | CareFirst BCBS | |
| ITL | Unassigned | |
| ITM | Blue Cross Blue Shield of Michigan | |
| ITN | Blue Shield of California | |
| ITO | Blue Shield of Northeastern New York | |
| ITP | Anthem BCBS of Ohio | |
| ITQ | Wellmark BCBS | |
| ITR | Empire Blue Cross Blue Shield | |
| ITS | Blue Cross Blue Shield of Arkansas | |
| ITT | Blue Cross of California | |
| ITU | Regence BCBS | |
| ITV | Anthem BCBS of Georgia | |
| ITW | Blue Cross Blue Shield of Illinois | |
| ITX | Regence BCBS | |
| ITY | Independence Blue Cross FOC | |
| ITZ | Anthem BCBS of Georgia | |
| IUA | Wellmark BCBS | |
| IUB | Anthem BCBS of Connecticut | |
| IUC | Anthem BCBS of Ohio | |
| IUD | Unassigned | |
| IUE | Empire Blue Cross Blue Shield | |
| IUF | Anthem BCBS of Missouri | |
| IUG | Premera Blue Cross | |
| IUH | Blue Cross Blue Shield of Massachusetts | |
| IUI | Blue Cross Blue Shield of Rhode Island | |
| IUJ | Blue Cross Blue Shield of South Carolina | |
| IUK | Blue Cross Blue Shield of South Carolina | |
| IUL | CareFirst BCBS | |
| IUM | Blue Cross Blue Shield of Massachusetts | |
| IUN | Unassigned | |
| IUO | Empire Blue Cross Blue Shield | |
| IUP | Anthem BCBS of Connecticut | |
| IUQ | CareFirst BCBS | |
| IUR | Independence Blue Cross FOC | |
| IUS | Independence Blue Cross FOC | |
| IUT | Anthem BCBS of Ohio | |
| IUU | Unassigned | |
| IUV | Regence BCBS | |
| IUW | Anthem BCBS of Ohio | |
| IUX | Empire Blue Cross Blue Shield | |
| IUY | Anthem BCBS of Georgia | |
| IUZ | Empire Blue Cross Blue Shield | |
| IVA | Unassigned | |
| IVB | Blue Cross Blue Shield of Michigan | |
| IVC | Blue Cross Blue Shield of Kansas City | |
| IVD | Highmark BCBS of Pennsylvania | |
| IVE | Blue Shield of California | |
| IVF | Blue Cross Blue Shield of Tennessee Commercial | |
| IVG | Blue Cross of California | |
| IVH | Blue Cross Blue Shield of Rhode Island | |
| IVI | Blue Cross Blue Shield of South Carolina | |
| IVJ | Anthem BCBS of Wisconsin | |
| IVK | Blue Cross Blue Shield of Mississippi | |
| IVL | Blue Cross Blue Shield of South Carolina | |
| IVM | Blue Cross Blue Shield of South Carolina | |
| IVN | Blue Cross Blue Shield of Tennessee Commercial | |
| IVO | Horizon BCBS of New Jersey | |
| IVP | Blue Cross Blue Shield of Michigan | |
| IVQ | Unassigned | |
| IVR | Blue Cross Blue Shield of South Carolina | |
| IVS | Blue Cross of California | |
| IVT | Wellmark BCBS | |
| IVU | Blue Cross Blue Shield of South Carolina | |
| IVV | Highmark BCBS of Pennsylvania | |
| IVW | Anthem BCBS of Wisconsin | |
| IVX | Anthem BCBS of Ohio | |
| IVY | Blue Cross Blue Shield of Rhode Island | |
| IVZ | Anthem BCBS of Ohio | |
| IWA | Anthem BCBS of Ohio | |
| IWB | Blue Cross Blue Shield of Nebraska | |
| IWC | Anthem BCBS of Virginia | |
| IWD | CareFirst BCBS | |
| IWE | Wellmark BCBS | |
| IWF | Empire Blue Cross Blue Shield | |
| IWG | Excellus BCBS | |
| IWH | CareFirst BCBS | |
| IWI | Anthem BCBS of Georgia | |
| IWJ | Anthem BCBS of Ohio | |
| IWK | Blue Cross Blue Shield of Michigan | |
| IWL | Blue Cross of California | |
| IWM | Blue Shield of Northeastern New York | |
| IWN | Anthem BCBS of Ohio | |
| IWO | Anthem BCBS of Missouri |
| IWP | Blue Cross Blue Shield of Michigan | |
| IWQ | Blue Cross of California | |
| IWR | Anthem BCBS of Connecticut | |
| IWS | Wellmark BCBS | |
| IWT | Capital Blue Cross | |
| IWU | Anthem BCBS of Virginia | |
| IWV | Blue Cross Blue Shield of Kansas City | |
| IWW | Blue Cross Blue Shield of Massachusetts | |
| IWX | BCBS of Western New York | |
| IWY | Empire Blue Cross Blue Shield | |
| IWZ | Blue Cross Blue Shield of Michigan | |
| IXA | Blue Cross Blue Shield of Arkansas | |
| IXB | Blue Shield of California | |
| IXC | Blue Shield of California | |
| IXD | Blue Cross of California | |
| IXE | Anthem BCBS of Ohio | |
| IXF | Anthem BCBS of Indiana | |
| IXG | Anthem BCBS of Indiana | |
| IXH | Anthem BCBS of Indiana | |
| IXI | Blue Cross Blue Shield of South Carolina | |
| IXJ | Anthem BCBS of Indiana | |
| IXK | Empire Blue Cross Blue Shield | |
| IXL | Blue Shield of California | |
| IXM | Blue Shield of California | |
| IXN | Anthem BCBS of Ohio | |
| IXO | Blue Shield of California | |
| IXP | Anthem BCBS of Missouri | |
| IXQ | Blue Cross Blue Shield of South Carolina | |
| IXR | Blue Cross Blue Shield of Michigan | |
| IXS | Independence Blue Cross FOC | |
| IXT | Blue Cross of California | |
| IXU | Independence Blue Cross FOC | |
| IXV | Unassigned | |
| IXW | Blue Cross Blue Shield of Michigan | |
| IXX | Empire Blue Cross Blue Shield | |
| IXY | Anthem BCBS of Ohio | |
| IXZ | Anthem BCBS of Georgia | |
| IYA | Unassigned | |
| IYB | Anthem BCBS of Wisconsin | |
| IYC | Independence Blue Cross FOC | |
| IYD | Capital Blue Cross | |
| IYE | Wellmark BCBS | |
| IYF | Unassigned | |
| IYG | Blue Cross Blue Shield of South Carolina | |
| IYH | Anthem BCBS of Kentucky | |
| IYI | Blue Cross Blue Shield of Michigan | |
| IYJ | Blue Cross Blue Shield of South Carolina | |
| IYK | Blue Cross Blue Shield of South Carolina | |
| IYL | Blue Cross of California | |
| IYM | Blue Cross Blue Shield of Minnesota | |
| IYN | Premera Blue Cross | |
| IYO | Blue Cross Blue Shield of Michigan | |
| IYP | Anthem BCBS of Colorado | |
| IYQ | Blue Cross Blue Shield of South Carolina | |
| IYR | Blue Cross Blue Shield of South Carolina | |
| IYS | Blue Cross Blue Shield of Rhode Island | |
| IYT | Anthem BCBS of Georgia | |
| IYU | Blue Cross Blue Shield of Michigan | |
| IYV | Blue Cross Blue Shield of Michigan | |
| IYW | Independence Blue Cross FOC | |
| IYX | Blue Cross Blue Shield of Michigan | |
| IYY | Blue Cross Blue Shield of Michigan | |
| IYZ | Blue Cross Blue Shield of Michigan | |
| IZA | Blue Cross Blue Shield of Alabama | |
| IZB | Anthem BCBS of Wisconsin | |
| IZC | Unassigned | |
| IZD | Anthem BCBS of Georgia | |
| IZE | CareFirst BCBS | |
| IZF | Independence Blue Cross FOC | |
| IZG | Blue Cross Blue Shield of Michigan | |
| IZH | Anthem BCBS of Georgia | |
| IZI | Blue Cross Blue Shield of Michigan | |
| IZJ | Blue Cross Blue Shield of Michigan | |
| IZK | Anthem BCBS of Ohio | |
| IZL | Blue Cross Blue Shield of Michigan | |
| IZM | Blue Cross Blue Shield of Michigan | |
| IZN | Anthem BCBS of Georgia | |
| IZO | Blue Cross Blue Shield of Michigan | |
| IZP | Blue Cross of Idaho | |
| IZQ | Blue Cross Blue Shield of Michigan | |
| IZR | Blue Cross Blue Shield of Michigan | |
| IZS | Blue Cross Blue Shield of Michigan | |
| IZT | Blue Cross Blue Shield of Michigan | |
| IZU | Wellmark BCBS | |
| IZV | Anthem BCBS of Georgia | |
| IZW | Blue Cross Blue Shield of Michigan | |
| IZX | Blue Cross Blue Shield of Michigan | |
| IZY | Blue Cross Blue Shield of Michigan | |
| IZZ | Anthem Blue Cross of California |