Today you will find The BCBS Alpha Prefix List from CAA to CZZ. The alpha prefix is very important to the identification number. The prefix acts as a key element in confirming the members’ eligibility and coverage information. Prefixes are also used to identify and correctly route claims to the appropriate Blue Cross Blue Shield Plan for processing. Most members with coverage through a Blue Cross Blue Shield Plan are assigned a Three Letter alpha prefix as a part of their unique identification number. The alpha prefix can easily be identified as it is the first three characters.
| BCBS Prefix | State Lookup | BCBS Company |
|---|---|---|
| CAA | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CAB | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| CAC | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| CAD | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CAE | New York | Empire Blue-Cross Blue-Shield of New York |
| CAF | Mississippi | Blue-Cross Blue-Shield of Mississippi |
| CAG | California | Blue-Shield of California |
| CAH | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| CAI | California | Anthem Blue-Cross |
| CAJ | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CAK | California | Blue-Shield of California |
| CAL | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| CAM | West Virginia | Highmark Blue-Cross Blue-Shield of West Virginia |
| CAN | Illinois | Blue-Cross Blue-Shield of Illinois |
| CAO | – | Unallocated/Not Assigned |
| CAP | Texas | Blue-Cross Blue-Shield of Texas |
| CAQ | Alaska | Premera Blue-Cross of Alaska |
| CAR | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| CAS | Texas | Blue-Cross Blue-Shield of Texas |
| CAT | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| CAU | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CAV | Alaska | Premera Blue-Cross of Alaska |
| CAW | California | Blue-Shield of California |
| CAX | California | Anthem Blue-Cross |
| CAY | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CAZ | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| CBA | California | Anthem Blue-Cross |
| CBB | Texas | Blue-Cross Blue-Shield of Texas |
| CBC | – | Unallocated/Not Assigned |
| CBD | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| CBE | – | Unallocated/Not Assigned |
| CBF | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CBG | Alabama | Blue-Cross Blue-Shield of Alabama |
| CBH | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| CBI | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CBJ | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| CBK | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CBL | – | Unallocated/Not Assigned |
| CBM | California | Anthem Blue-Cross |
| CBN | – | Unallocated/Not Assigned |
| CBO | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| CBP | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CBQ | California | Anthem Blue-Cross |
| CBR | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| CBS | New Hampshire | Anthem Blue-Cross Blue-Shield of New Hampshire |
| CBT | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CBU | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| CBV | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| CBW | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| CBX | – | Unallocated/Not Assigned |
| CBY | Illinois | Blue-Cross Blue-Shield of Illinois |
| CBZ | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| CCA | New York | Empire Blue-Cross Blue-Shield of New York |
| CCB | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CCC | Idaho | Blue-Cross of Idaho |
| CCD | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| CCE | – | Unallocated/Not Assigned |
| CCF | Illinois | Blue-Cross Blue-Shield of Illinois |
| CCG | – | Unallocated/Not Assigned |
| CCH | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CCI | Michigan | Blue-Cross Blue-Shield of Michigan |
| CCJ | Michigan | Blue-Cross Blue-Shield of Michigan |
| CCK | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| CCL | Illinois | Blue-Cross Blue-Shield of Illinois |
| CCM | Texas | Blue-Cross Blue-Shield of Texas |
| CCN | – | Unallocated/Not Assigned |
| CCO | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| CCP | – | Unallocated/Not Assigned |
| CCQ | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| CCR | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CCS | – | Unallocated/Not Assigned |
| CCT | – | Unallocated/Not Assigned |
| CCU | – | Unallocated/Not Assigned |
| CCV | California | Anthem Blue-Cross |
| CCW | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CCX | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| CCY | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CCZ | California | Blue-Shield of California |
| CDA | Illinois | Blue-Cross Blue-Shield of Illinois |
| CDB | – | Unallocated/Not Assigned |
| CDC | Arizona | Blue-Cross Blue-Shield of Arizona |
| CDD | – | Unallocated/Not Assigned |
| CDE | – | Unallocated/Not Assigned |
| CDF | Kentucky | Anthem Blue-Cross Blue-Shield of Kentucky |
| CDG | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CDH | – | Unallocated/Not Assigned |
| CDI | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CDJ | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| CDK | New York | Empire Blue-Cross Blue-Shield of New York |
| CDL | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CDM | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| CDN | Arkansas | Arkansas Blue-Cross Blue-Shield |
| CDO | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CDP | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CDQ | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| CDR | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CDS | New York (Northeastern) | Blue-Shield of Northeastern New York |
| CDT | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| CDU | Illinois | Blue-Cross Blue-Shield of Illinois |
| CDV | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| CDW | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CDX | Illinois | Blue-Cross Blue-Shield of Illinois |
| CDY | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CDZ | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| CEA | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| CEB | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CEC | Illinois | Blue-Cross Blue-Shield of Illinois |
| CED | Illinois | Blue-Cross Blue-Shield of Illinois |
| CEE | Texas | Blue-Cross Blue-Shield of Texas |
| CEF | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CEG | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CEH | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CEI | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CEJ | Illinois | Blue-Cross Blue-Shield of Illinois |
| CEK | – | Unallocated/Not Assigned |
| CEL | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CEM | California | Anthem Blue-Cross |
| CEN | – | Unallocated/Not Assigned |
| CEO | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| CEP | Illinois | Blue-Cross Blue-Shield of Illinois |
| CEQ | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CER | – | Unallocated/Not Assigned |
| CES | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| CET | California | Blue-Shield of California |
| CEU | – | Unallocated/Not Assigned |
| CEV | Illinois | Blue-Cross Blue-Shield of Illinois |
| CEW | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CEX | Illinois | Blue-Cross Blue-Shield of Illinois |
| CEY | Illinois | Blue-Cross Blue-Shield of Illinois |
| CEZ | Illinois | Blue-Cross Blue-Shield of Illinois |
| CFA | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| CFB | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CFC | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| CFD | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| CFE | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| CFF | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| CFG | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| CFH | California | Anthem Blue-Cross |
| CFI | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CFJ | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CFK | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CFL | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| CFM | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CFN | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CFO | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CFP | – | Unallocated/Not Assigned |
| CFQ | – | Unallocated/Not Assigned |
| CFR | Illinois | Blue-Cross Blue-Shield of Illinois |
| CFS | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| CFT | New York | Empire Blue-Cross Blue-Shield of New York |
| CFU | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CFV | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CFW | – | Unallocated/Not Assigned |
| CFX | Alaska | Premera Blue-Cross of Alaska |
| CFY | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CFZ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CGA | California | Anthem Blue-Cross |
| CGB | California | Blue-Shield of California |
| CGC | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| CGD | California | Blue-Shield of California |
| CGE | Texas | Blue-Cross Blue-Shield of Texas |
| CGF | Arizona | Blue-Cross Blue-Shield of Arizona |
| CGG | Kentucky | Anthem Blue-Cross Blue-Shield of Kentucky |
| CGH | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| CGI | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CGJ | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CGK | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CGL | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| CGM | – | Unallocated/Not Assigned |
| CGN | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| CGO | Illinois | Blue-Cross Blue-Shield of Illinois |
| CGP | New York | Excellus Blue-Cross Blue-Shield of New York |
| CGQ | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| CGR | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CGS | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| CGT | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| CGU | – | Unallocated/Not Assigned |
| CGV | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CGW | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| CGX | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| CGY | Florida | Florida-Blue |
| CGZ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CHA | Alabama | Blue-Cross Blue-Shield of Alabama |
| CHB | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CHC | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CHD | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CHE | – | Unallocated/Not Assigned |
| CHF | Texas | Blue-Cross Blue-Shield of Texas |
| CHG | Illinois | Blue-Cross Blue-Shield of Illinois |
| CHH | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| CHI | – | Unallocated/Not Assigned |
| CHJ | – | Unallocated/Not Assigned |
| CHK | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CHL | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CHM | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| CHN | – | Unallocated/Not Assigned |
| CHO | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| CHP | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| CHQ | Kentucky | Anthem Blue-Cross Blue-Shield of Kentucky |
| CHR | Illinois | Blue-Cross Blue-Shield of Illinois |
| CHS | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| CHT | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| CHU | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CHV | Illinois | Blue-Cross Blue-Shield of Illinois |
| CHW | – | Unallocated/Not Assigned |
| CHX | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| CHY | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| CHZ | – | Unallocated/Not Assigned |
| CIA | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CIB | Illinois | Blue-Cross Blue-Shield of Illinois |
| CIC | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CID | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| CIE | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CIF | Illinois | Blue-Cross Blue-Shield of Illinois |
| CIG | – | Unallocated/Not Assigned |
| CIH | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CII | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| CIJ | Idaho | Blue-Cross of Idaho |
| CIK | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| CIL | – | Unallocated/Not Assigned |
| CIM | – | Unallocated/Not Assigned |
| CIN | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CIO | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| CIP | Alabama | Blue-Cross Blue-Shield of Alabama |
| CIQ | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| CIR | Alaska | Premera Blue-Cross of Alaska |
| CIS | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| CIT | Florida | Florida-Blue |
| CIU | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| CIV | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| CIW | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| CIX | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| CIY | Florida | Florida-Blue |
| CIZ | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CJA | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| CJB | Illinois | Blue-Cross Blue-Shield of Illinois |
| CJC | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CJD | – | Unallocated/Not Assigned |
| CJE | New York | Empire Blue-Cross Blue-Shield of New York |
| CJF | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| CJG | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| CJH | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| CJI | West Virginia | Highmark Blue-Cross Blue-Shield of West Virginia |
| CJJ | Alaska | Premera Blue-Cross of Alaska |
| CJK | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CJL | New York | Empire Blue-Cross Blue-Shield of New York |
| CJM | Florida | Florida-Blue |
| CJN | Florida | Florida-Blue |
| CJO | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CJP | – | Unallocated/Not Assigned |
| CJQ | Idaho | Blue-Cross of Idaho |
| CJR | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| CJS | Illinois | Blue-Cross Blue-Shield of Illinois |
| CJT | Texas | Blue-Cross Blue-Shield of Texas |
| CJU | Illinois | Blue-Cross Blue-Shield of Illinois |
| CJV | New York | Empire Blue-Cross Blue-Shield of New York |
| CJW | – | Unallocated/Not Assigned |
| CJX | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CJY | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CJZ | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CKA | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CKB | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CKC | – | Unallocated/Not Assigned |
| CKD | – | Unallocated/Not Assigned |
| CKE | California | Blue-Shield of California |
| CKF | – | Unallocated/Not Assigned |
| CKG | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| CKH | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| CKI | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| CKJ | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| CKK | – | Unallocated/Not Assigned |
| CKL | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CKM | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| CKN | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| CKO | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CKP | Texas | Blue-Cross Blue-Shield of Texas |
| CKQ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CKR | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| CKS | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| CKT | – | Unallocated/Not Assigned |
| CKU | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CKV | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CKW | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| CKX | California | Blue-Shield of California |
| CKY | California | Blue-Shield of California |
| CKZ | – | Unallocated/Not Assigned |
| CLA | – | Unallocated/Not Assigned |
| CLB | Illinois | Blue-Cross Blue-Shield of Illinois |
| CLC | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| CLD | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| CLE | Texas | Blue-Cross Blue-Shield of Texas |
| CLF | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| CLG | – | Unallocated/Not Assigned |
| CLH | New York | Excellus Blue-Cross Blue-Shield of New York |
| CLI | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CLJ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CLK | – | Unallocated/Not Assigned |
| CLL | California | Anthem Blue-Cross |
| CLM | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CLN | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| CLO | Mississippi | Blue-Cross Blue-Shield of Mississippi |
| CLP | – | Unallocated/Not Assigned |
| CLQ | – | Unallocated/Not Assigned |
| CLR | Alaska | Premera Blue-Cross of Alaska |
| CLS | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CLT | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CLU | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| CLV | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CLW | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| CLX | – | Unallocated/Not Assigned |
| CLY | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CLZ | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CMA | Michigan | Blue-Cross Blue-Shield of Michigan |
| CMB | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| CMC | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CMD | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| CME | Illinois | Blue-Cross Blue-Shield of Illinois |
| CMF | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CMG | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CMH | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| CMI | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| CMJ | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| CMK | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CML | – | Unallocated/Not Assigned |
| CMM | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CMN | New York (Northeastern) | Blue-Shield of Northeastern New York |
| CMO | – | Unallocated/Not Assigned |
| CMP | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| CMQ | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| CMR | Illinois | Blue-Cross Blue-Shield of Illinois |
| CMS | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CMT | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CMU | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| CMV | California | Blue-Shield of California |
| CMW | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CMX | New York | Excellus Blue-Cross Blue-Shield of New York |
| CMY | Idaho | Blue-Cross of Idaho |
| CMZ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CNA | – | Unallocated/Not Assigned |
| CNB | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CNC | Texas | Blue-Cross Blue-Shield of Texas |
| CND | – | Unallocated/Not Assigned |
| CNE | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CNF | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CNG | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| CNH | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CNI | Texas | Blue-Cross Blue-Shield of Texas |
| CNJ | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| CNK | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CNL | Illinois | Blue-Cross Blue-Shield of Illinois |
| CNM | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| CNN | – | Unallocated/Not Assigned |
| CNO | – | Unallocated/Not Assigned |
| CNP | – | Unallocated/Not Assigned |
| CNQ | – | Unallocated/Not Assigned |
| CNR | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CNS | – | Unallocated/Not Assigned |
| CNT | Illinois | Blue-Cross Blue-Shield of Illinois |
| CNU | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CNV | Illinois | Blue-Cross Blue-Shield of Illinois |
| CNW | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CNX | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| CNY | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| CNZ | Illinois | Blue-Cross Blue-Shield of Illinois |
| COA | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| COB | Texas | Blue-Cross Blue-Shield of Texas |
| COC | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| COD | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| COE | – | Unallocated/Not Assigned |
| COF | – | Unallocated/Not Assigned |
| COG | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| COH | – | Unallocated/Not Assigned |
| COI | – | Unallocated/Not Assigned |
| COJ | Alabama | Blue-Cross Blue-Shield of Alabama |
| COK | – | Unallocated/Not Assigned |
| COL | – | Unallocated/Not Assigned |
| COM | Alabama | Blue-Cross Blue-Shield of Alabama |
| CON | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| COO | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| COP | Alabama | Blue-Cross Blue-Shield of Alabama |
| COQ | – | Unallocated/Not Assigned |
| COR | – | Unallocated/Not Assigned |
| COS | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| COT | Idaho | Blue-Cross of Idaho |
| COU | – | Unallocated/Not Assigned |
| COV | Arizona | Blue-Cross Blue-Shield of Arizona |
| COW | – | Unallocated/Not Assigned |
| COX | California | Blue-Shield of California |
| COY | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| COZ | – | Unallocated/Not Assigned |
| CPA | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| CPB | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CPC | Alabama | Blue-Cross Blue-Shield of Alabama |
| CPD | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CPE | Illinois | Blue-Cross Blue-Shield of Illinois |
| CPF | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| CPG | New York (Northeastern) | Blue-Shield of Northeastern New York |
| CPH | Illinois | Blue-Cross Blue-Shield of Illinois |
| CPI | – | Unallocated/Not Assigned |
| CPJ | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CPK | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| CPL | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| CPM | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CPN | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CPO | – | Unallocated/Not Assigned |
| CPP | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CPQ | California | Anthem Blue-Cross |
| CPR | California | Anthem Blue-Cross |
| CPS | Alabama | Blue-Cross Blue-Shield of Alabama |
| CPT | California | Anthem Blue-Cross |
| CPU | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| CPV | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| CPW | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CPX | – | Unallocated/Not Assigned |
| CPY | Illinois | Blue-Cross Blue-Shield of Illinois |
| CPZ | New York (Northeastern) | Blue-Shield of Northeastern New York |
| CQA | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| CQB | California | Anthem Blue-Cross |
| CQC | – | Unallocated/Not Assigned |
| CQD | – | Unallocated/Not Assigned |
| CQE | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| CQF | – | Unallocated/Not Assigned |
| CQG | – | Unallocated/Not Assigned |
| CQH | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| CQI | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CQJ | Texas | Blue-Cross Blue-Shield of Texas |
| CQK | California | Blue-Shield of California |
| CQL | – | Unallocated/Not Assigned |
| CQM | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| CQN | California | Blue-Shield of California |
| CQO | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CQP | – | Unallocated/Not Assigned |
| CQQ | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| CQR | – | Unallocated/Not Assigned |
| CQS | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| CQT | – | Unallocated/Not Assigned |
| CQU | – | Unallocated/Not Assigned |
| CQV | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CQW | – | Unallocated/Not Assigned |
| CQX | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| CQY | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CQZ | – | Unallocated/Not Assigned |
| CRA | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| CRB | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| CRC | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| CRD | – | Unallocated/Not Assigned |
| CRE | California | Blue-Shield of California |
| CRF | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| CRG | Texas | Blue-Cross Blue-Shield of Texas |
| CRH | Michigan | Blue-Cross Blue-Shield of Michigan |
| CRI | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CRJ | – | Unallocated/Not Assigned |
| CRK | Texas | Blue-Cross Blue-Shield of Texas |
| CRL | New York | Excellus Blue-Cross Blue-Shield of New York |
| CRM | Illinois | Blue-Cross Blue-Shield of Illinois |
| CRN | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| CRO | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| CRP | Illinois | Blue-Cross Blue-Shield of Illinois |
| CRQ | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| CRR | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CRS | Alaska | Premera Blue-Cross of Alaska |
| CRT | – | Unallocated/Not Assigned |
| CRU | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| CRV | – | Unallocated/Not Assigned |
| CRW | California | Anthem Blue-Cross |
| CRX | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| CRY | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| CRZ | Texas | Blue-Cross Blue-Shield of Texas |
| CSA | Alabama | Blue-Cross Blue-Shield of Alabama |
| CSB | Illinois | Blue-Cross Blue-Shield of Illinois |
| CSC | Florida | Florida-Blue |
| CSD | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CSE | – | Unallocated/Not Assigned |
| CSF | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| CSG | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| CSH | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| CSI | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| CSJ | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| CSK | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CSL | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| CSM | Arkansas | Arkansas Blue-Cross Blue-Shield |
| CSN | – | Unallocated/Not Assigned |
| CSO | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CSP | New York | Excellus Blue-Cross Blue-Shield of New York |
| CSQ | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| CSR | California | Blue-Shield of California |
| CSS | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| CST | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| CSU | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| CSV | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| CSW | – | Unallocated/Not Assigned |
| CSX | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CSY | – | Unallocated/Not Assigned |
| CSZ | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| CTA | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CTB | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| CTC | Oklahoma | Blue-Cross Blue-Shield of Oklahoma |
| CTD | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| CTE | – | Unallocated/Not Assigned |
| CTF | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| CTG | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| CTH | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| CTI | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CTJ | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| CTK | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| CTL | Illinois | Blue-Cross Blue-Shield of Illinois |
| CTM | Idaho | Blue-Cross of Idaho |
| CTN | – | Unallocated/Not Assigned |
| CTO | California | Blue-Shield of California |
| CTP | – | Unallocated/Not Assigned |
| CTQ | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| CTR | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| CTS | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| CTT | Alaska | Premera Blue-Cross of Alaska |
| CTU | California | Blue-Shield of California |
| CTV | – | Unallocated/Not Assigned |
| CTW | Alaska | Premera Blue-Cross of Alaska |
| CTX | California | Blue-Shield of California |
| CTY | Illinois | Blue-Cross Blue-Shield of Illinois |
| CTZ | Arizona | Blue-Cross Blue-Shield of Arizona |
| CUA | – | Unallocated/Not Assigned |
| CUB | New York | Excellus Blue-Cross Blue-Shield of New York |
| CUC | – | Unallocated/Not Assigned |
| CUD | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CUE | – | Unallocated/Not Assigned |
| CUF | California | Blue-Shield of California |
| CUG | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CUH | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| CUI | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| CUJ | – | Unallocated/Not Assigned |
| CUK | Alabama | Blue-Cross Blue-Shield of Alabama |
| CUL | – | Unallocated/Not Assigned |
| CUM | – | Unallocated/Not Assigned |
| CUN | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| CUO | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| CUP | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CUQ | California | Blue-Shield of California |
| CUR | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| CUS | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| CUT | Illinois | Blue-Cross Blue-Shield of Illinois |
| CUU | Texas | Blue-Cross Blue-Shield of Texas |
| CUV | Illinois | Blue-Cross Blue-Shield of Illinois |
| CUW | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CUX | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| CUY | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| CUZ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CVA | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| CVB | Florida | Florida-Blue |
| CVC | Illinois | Blue-Cross Blue-Shield of Illinois |
| CVD | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CVE | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| CVF | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CVG | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CVH | – | Unallocated/Not Assigned |
| CVI | Alabama | Blue-Cross Blue-Shield of Alabama |
| CVJ | Florida | Florida-Blue |
| CVK | Florida | Florida-Blue |
| CVL | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| CVM | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| CVN | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| CVO | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| CVP | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CVQ | – | Unallocated/Not Assigned |
| CVR | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| CVS | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CVT | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CVU | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| CVV | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CVW | – | Unallocated/Not Assigned |
| CVX | Illinois | Blue-Cross Blue-Shield of Illinois |
| CVY | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CVZ | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CWA | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CWB | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CWC | – | Unallocated/Not Assigned |
| CWD | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CWE | Michigan | Blue-Cross Blue-Shield of Michigan |
| CWF | Idaho | Blue-Cross of Idaho |
| CWG | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CWH | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| CWI | California | Blue-Shield of California |
| CWJ | – | Unallocated/Not Assigned |
| CWK | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CWL | – | Unallocated/Not Assigned |
| CWM | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| CWN | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CWO | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CWP | Texas | Blue-Cross Blue-Shield of Texas |
| CWQ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CWR | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| CWS | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| CWT | Texas | Blue-Cross Blue-Shield of Texas |
| CWU | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CWV | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CWW | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CWX | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| CWY | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CWZ | New York | Empire Blue-Cross Blue-Shield of New York |
| CXA | – | Unallocated/Not Assigned |
| CXB | Idaho | Blue-Cross of Idaho |
| CXC | Rhode Island | Blue-Cross Blue-Shield of Rhode Island |
| CXD | Illinois | Blue-Cross Blue-Shield of Illinois |
| CXE | – | Unallocated/Not Assigned |
| CXF | Alaska | Premera Blue-Cross of Alaska |
| CXG | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| CXH | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| CXI | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| CXJ | New York | Excellus Blue-Cross Blue-Shield of New York |
| CXK | Texas | Blue-Cross Blue-Shield of Texas |
| CXL | – | Unallocated/Not Assigned |
| CXM | – | Unallocated/Not Assigned |
| CXN | – | Unallocated/Not Assigned |
| CXO | Arkansas | Arkansas Blue-Cross Blue-Shield |
| CXP | Texas | Blue-Cross Blue-Shield of Texas |
| CXQ | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CXR | Rhode Island | Blue-Cross Blue-Shield of Rhode Island |
| CXS | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| CXT | Illinois | Blue-Cross Blue-Shield of Illinois |
| CXU | – | Unallocated/Not Assigned |
| CXV | – | Unallocated/Not Assigned |
| CXW | – | Unallocated/Not Assigned |
| CXX | California | Blue-Shield of California |
| CXY | – | Unallocated/Not Assigned |
| CXZ | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CYA | Illinois | Blue-Cross Blue-Shield of Illinois |
| CYB | California | Blue-Shield of California |
| CYC | Illinois | Blue-Cross Blue-Shield of Illinois |
| CYD | – | Unallocated/Not Assigned |
| CYE | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| CYF | – | Unallocated/Not Assigned |
| CYG | Florida | Florida-Blue |
| CYH | – | Unallocated/Not Assigned |
| CYI | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CYJ | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| CYK | Florida | Florida-Blue |
| CYL | Illinois | Blue-Cross Blue-Shield of Illinois |
| CYM | – | Unallocated/Not Assigned |
| CYN | – | Unallocated/Not Assigned |
| CYO | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| CYP | Illinois | Blue-Cross Blue-Shield of Illinois |
| CYQ | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| CYR | Texas | Blue-Cross Blue-Shield of Texas |
| CYS | Illinois | Blue-Cross Blue-Shield of Illinois |
| CYT | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| CYU | New York | Empire Blue-Cross Blue-Shield of New York |
| CYV | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| CYW | – | Unallocated/Not Assigned |
| CYX | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| CYY | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| CYZ | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| CZA | Kentucky | Anthem Blue-Cross Blue-Shield of Kentucky |
| CZB | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| CZC | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| CZD | – | Unallocated/Not Assigned |
| CZE | Texas | Blue-Cross Blue-Shield of Texas |
| CZF | – | Unallocated/Not Assigned |
| CZG | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| CZH | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| CZI | California | Blue-Shield of California |
| CZJ | – | Unallocated/Not Assigned |
| CZK | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| CZL | – | Unallocated/Not Assigned |
| CZM | – | Unallocated/Not Assigned |
| CZN | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| CZO | – | Unallocated/Not Assigned |
| CZP | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CZQ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| CZR | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| CZS | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| CZT | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| CZU | California | Anthem Blue-Cross |
| CZV | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| CZW | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| CZX | – | Unallocated/Not Assigned |
| CZY | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| CZZ | – | Unallocated/Not Assigned |
Some identification cards may not include an alpha prefix, which may indicate that the claim filing instructions for these type policies are different. We suggest that you verify claim filing instructions during the time eligibility information is obtained. If not, please follow the instructions on the back of the member’s ID card or contact the plan directly. Member eligibility can be obtained at 1 (800) 676-BLUE (2583). Once connected, you will then simply provide the alpha prefix and the operator will then route you to the member’s plan. Helpful Tips Related to the Alpha Prefix:
- Do not omit or randomly select an alpha prefix.
- Do not substitute another Blue Cross Blue Shield Member’s prefix.
- Include the alpha prefix and all alpha characters preceding the alpha prefix on all correspondence and claims submitted to Blue Cross Blue Shield of Texas.
- The alpha prefix is always three letters followed by the member’s ID number which can be from 6 up to 14 characters total.
- If possible, make copies of the member’s ID card (front and back) for your records.
- We recommend that you obtain a copy of the ID card any time there has been a coverage or policy change. If there are no changes, we suggest that you obtain card copies annually.
About us
Billing Executive – a Medical Billing and Coding Knowledge Base for Physicians, Office staff, Medical Billers and Coders, including resources pertaining to HCPCS Codes, CPT Codes, ICD-10 billing codes, Modifiers, POS Codes, Revenue Codes, Billing Errors, Denials and Rejections.
Read More:
BCBS Alpha Prefix List – AAA to AZZ
BCBS Alpha Prefix List – BAA to BZZ
Common Medical Billing Terminologies # B & C
What is Denial Reason Code CO 22? How to Resolve it?
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