Prefixes from CAC to CZY
| CAC | ANTHEM BLUE CROSS – CALIFORNIA |
| CAE | EMPIRE BCBS – NEW YORK |
| CAF | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CAH | ANTHEM BCBS – VIRGINIA |
| CAK | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CAM | MOUNTAIN STATE BCBS – WV |
| CAN | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| CAR | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CAU | BCBS – SOUTH CAROLINA |
| CAV | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| CAX | EMPIRE BCBS – NEW YORK |
| CAZ | ANTHEM BLUE CROSS – CALIFORNIA |
| CBB | EXCELLUS BCBS – ROCHESTER – NY |
| CBC | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CBD | HIGHMARK INC |
| CBE | ANTHEM BCBS – VIRGINIA |
| CBJ | EMPIRE BCBS – NEW YORK |
| CBO | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CBP | ANTHEM BCBS – OHIO |
| CBT | ANTHEM BCBS – OHIO |
| CBY | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CCA | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| CCC | HIGHMARK INC |
| CCE | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| CCG | HIGHMARK INC |
| CCH | WELLMARK OF IOWA/SOUTH DAKOTA |
| CCK | BLUE CROSS – IDAHO – BOISE |
| CCL | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CCN | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| CCP | ANTHEM BCBS – VIRGINIA |
| CCQ | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| CCS | ANTHEM BLUE CROSS – CALIFORNIA |
| CCU | ANTHEM BCBS – OHIO |
| CCV | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CCX | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CCZ | BLUE SHIELD OF CALIFORNIA |
| CDA | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CDB | ANTHEM BLUE CROSS – CALIFORNIA |
| CDE | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CDF | EMPIRE BCBS – NEW YORK |
| CDJ | INDEPENDENCE BLUE CROSS |
| CDM | HIGHMARK INC |
| CDN | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CDO | WELLMARK OF IOWA/SOUTH DAKOTA |
| CDQ | INDEPENDENCE BLUE CROSS |
| CDU | BLUE CROSS – IDAHO – BOISE |
| CDV | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| CDX | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CDZ | INDEPENDENCE BLUE CROSS |
| CEB | WELLMARK OF IOWA/SOUTH DAKOTA |
| CEC | BLUE SHIELD OF CALIFORNIA |
| CED | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CEH | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CEI | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| CEK | REGENCE BCBS – UTAH |
| CEP | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CET | BLUE SHIELD OF CALIFORNIA |
| CEU | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| CEX | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CFD | ANTHEM BCBS – OHIO |
| CFE | PREMERA BLUE CROSS – SEATTLE WA |
| CFF | HIGHMARK INC |
| CFG | ANTHEM BCBS – OHIO |
| CFI | CAREFIRST BCBS – MARYLAND |
| CFJ | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| CFL | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| CFM | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CFN | BLUE SHIELD OF CALIFORNIA |
| CFO | CAREFIRST BCBS – MARYLAND |
| CFQ | BCBS – SOUTH CAROLINA |
| CFS | ANTHEM BLUE CROSS – CALIFORNIA |
| CFT | ANTHEM BLUE CROSS – CALIFORNIA |
| CFV | WELLMARK OF IOWA/SOUTH DAKOTA |
| CFW | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| CFX | ANTHEM BCBS – VIRGINIA |
| CFY | ANTHEM BCBS – OHIO |
| CFZ | ANTHEM BCBS – OHIO |
| CGA | ANTHEM BLUE CROSS – CALIFORNIA |
| CGB | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CGC | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| CGH | EMPIRE BCBS – NEW YORK |
| CGI | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CGJ | BCBS – LOUISIANA |
| CGK | CAREFIRST BCBS – MARYLAND |
| CGL | BCBS – MINNESOTA |
| CGO | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CGQ | BCBS – NORTH CAROLINA |
| CGU | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CGV | CAREFIRST BCBS – MARYLAND |
| CGY | BLUE CROSS AND BLUE SHIELD-FLORIDA |
| CHB | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CHC | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CHC | INDEPENDENCE BLUE CROSS |
| CHH | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CHO | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CHP | CAPITAL HEALTH PLAN |
| CHQ | ANTHEM BLUE CROSS – CALIFORNIA |
| CHS | BCBS – NORTH CAROLINA |
| CHT | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CHU | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CHV | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CHX | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CHY | BCBS – SOUTH CAROLINA |
| CHZ | BCBS – MINNESOTA |
| CIA | EMPIRE BCBS – NEW YORK |
| CIB | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CIC | CAREFIRST BCBS – MARYLAND |
| CID | BCBS – NORTH CAROLINA |
| CIE | EXCELLUS BCBS – SYRACUSE – NY |
| CIF | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CIG | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CIJ | BLUE CROSS – IDAHO – BOISE |
| CIM | BLUE SHIELD OF CALIFORNIA |
| CIN | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CIO | CAPITAL HEALTH PLAN |
| CIP | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| CIR | PREMERA BLUE CROSS – SEATTLE WA |
| CIU | BLUE CROSS – IDAHO – BOISE |
| CIV | CAPITAL BLUE CROSS – HARRISBURG PA |
| CIX | ANTHEM BCBS – MISSOURI |
| CIY | BLUE CROSS – IDAHO – BOISE |
| CJB | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CJF | EMPIRE BCBS – NEW YORK |
| CJG | BCBS – KANSAS CITY – MO |
| CJH | ANTHEM BCBS – OHIO |
| CJJ | REGENCE BCBS – OREGON |
| CJK | ANTHEM BCBS – MISSOURI |
| CJL | ANTHEM BCBS – OHIO |
| CJT | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| CJV | ANTHEM BCBS – OHIO |
| CJY | BLUE CROSS – IDAHO – BOISE |
| CJZ | ANTHEM BLUE CROSS – CALIFORNIA |
| CKA | ANTHEM BCBS – VIRGINIA |
| CKH | ANTHEM BCBS – OHIO |
| CKJ | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CKK | HIGHMARK INC |
| CKL | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| CKM | HIGHMARK INC |
| CKO | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| CKR | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CKU | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CKX | BLUE CROSS AND BLUE SHIELD-OKLAHOMA |
| CKZ | HEALTHNOW NEW YORK INC – BUFFALO |
| CLA | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CLB | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CLD | ANTHEM BLUE CROSS – CALIFORNIA |
| CLF | ANTHEM BCBS – VIRGINIA |
| CLK | EMPIRE BCBS – NEW YORK |
| CLM | BLUE SHIELD OF CALIFORNIA |
| CLN | ANTHEM BCBS – COLORADO |
| CLP | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CLQ | ANTHEM BCBS – VIRGINIA |
| CLS | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| CLV | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| CLX | PREMERA BLUE CROSS – SEATTLE WA |
| CLY | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CLZ | HEALTHNOW NEW YORK INC – BUFFALO |
| CMA | BCBS OF MICHIGAN |
| CMC | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CMH | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CMI | ANTHEM BCBS – OHIO |
| CMJ | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CMM | ANTHEM BCBS – OHIO |
| CMP | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CMQ | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CMX | EXCELLUS BCBS – ROCHESTER – NY |
| CNA | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| CNB | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CNK | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CNL | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CNM | HIGHMARK INC |
| CNO | ANTHEM BLUE CROSS – CALIFORNIA |
| CNQ | ANTHEM BLUE CROSS – CALIFORNIA |
| COB | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| COC | CAREFIRST BCBS – MARYLAND |
| COD | BCBS OF MICHIGAN |
| COF | ANTHEM BCBS – OHIO |
| COJ | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| COK | BLUE SHIELD OF CALIFORNIA |
| COM | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| COP | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| COW | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| CPB | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CPC | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| CPD | ANTHEM BLUE CROSS – CALIFORNIA |
| CPE | BCBS – SOUTH CAROLINA |
| CPG | HEALTHNOW NEW YORK INC – ALBANY |
| CPJ | EMPIRE BCBS – NEW YORK |
| CPL | BLUE SHIELD OF CALIFORNIA |
| CPM | HIGHMARK INC |
| CPN | EXCELLUS BCBS – ROCHESTER – NY |
| CPN | EXCELLUS BCBS – SYRACUSE – NY |
| CPR | ANTHEM BLUE CROSS – CALIFORNIA |
| CPS | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| CPT | ANTHEM BLUE CROSS – CALIFORNIA |
| CPW | BCBS – RHODE ISLAND |
| CPX | BCBS – SOUTH CAROLINA |
| CQA | INDEPENDENCE BLUE CROSS |
| CQG | ANTHEM BLUE CROSS – CALIFORNIA |
| CQH | ANTHEM BCBS – VIRGINIA |
| CQI | BCBS – NORTH CAROLINA |
| CQJ | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| CQL | ANTHEM BLUE CROSS – CALIFORNIA |
| CQM | HIGHMARK INC |
| CQN | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CQQ | ANTHEM BCBS – OHIO |
| CQS | HEALTHNOW NEW YORK INC – BUFFALO |
| CQU | ANTHEM BCBS – OHIO |
| CQV | WELLMARK OF IOWA/SOUTH DAKOTA |
| CQX | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CQY | WELLMARK OF IOWA/SOUTH DAKOTA |
| CRC | CAPITAL BLUE CROSS – HARRISBURG PA |
| CRD | BCBS – MINNESOTA |
| CRE | ANTHEM BCBS – OHIO |
| CRH | BCBS OF MICHIGAN |
| CRI | HEALTHNOW NEW YORK INC – BUFFALO |
| CRL | EXCELLUS BCBS – ROCHESTER – NY |
| CRN | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CRP | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CRR | ANTHEM BCBS – OHIO |
| CRU | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CRY | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CSA | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| CSC | ANTHEM BLUE CROSS – CALIFORNIA |
| CSG | ANTHEM BCBS – OHIO |
| CSK | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| CSM | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| CSP | EXCELLUS BCBS – ROCHESTER – NY |
| CSR | WELLMARK OF IOWA/SOUTH DAKOTA |
| CSU | ANTHEM BLUE CROSS – CALIFORNIA |
| CSV | ANTHEM BLUE CROSS – CALIFORNIA |
| CSX | ANTHEM BCBS – MISSOURI |
| CTA | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CTB | BCBS – SOUTH CAROLINA |
| CTD | ANTHEM BCBS – OHIO |
| CTF | BCBS – MINNESOTA |
| CTI | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CTL | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CTN | ANTHEM BCBS – CONNECTICUT |
| CTP | ANTHEM BCBS – CONNECTICUT |
| CTQ | HEALTHNOW NEW YORK INC – BUFFALO |
| CTS | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CTW | WELLMARK OF IOWA/SOUTH DAKOTA |
| CTX | BCBS – SOUTH CAROLINA |
| CTY | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CUA | ANTHEM BCBS – OHIO |
| CUB | EXCELLUS BCBS – ROCHESTER – NY |
| CUD | ANTHEM BCBS – OHIO |
| CUE | ANTHEM BCBS – OHIO |
| CUK | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| CUM | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CUO | BLUE SHIELD OF CALIFORNIA |
| CUQ | BLUE SHIELD OF CALIFORNIA |
| CUR | HEALTHNOW NEW YORK INC – BUFFALO |
| CUU | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| CUW | ANTHEM BLUE CROSS – CALIFORNIA |
| CUX | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CUZ | ANTHEM BCBS – OHIO |
| CVB | BLUE CROSS AND BLUE SHIELD-FLORIDA |
| CVC | ANTHEM BCBS – OHIO |
| CVG | BLUE CROSS AND BLUE SHIELD-FLORIDA |
| CVJ | BLUE CROSS AND BLUE SHIELD-FLORIDA |
| CVK | BLUE CROSS AND BLUE SHIELD-FLORIDA |
| CVQ | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| CVV | ANTHEM BLUE CROSS – CALIFORNIA |
| CVX | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CVY | BCBS – LOUISIANA |
| CWA | CAREFIRST BCBS – WASHINGTON DC |
| CWB | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| CWE | BCBS OF MICHIGAN |
| CWF | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| CWG | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CWH | ANTHEM BLUE CROSS – CALIFORNIA |
| CWI | BLUE SHIELD OF CALIFORNIA |
| CWJ | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| CWK | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CWN | CAREFIRST BCBS – WASHINGTON DC |
| CWQ | ANTHEM BCBS – OHIO |
| CWS | BLUE CROSS AND BLUE SHIELD-VERMONT |
| CWV | ANTHEM BCBS – OHIO |
| CWX | PREMERA BLUE CROSS – SEATTLE WA |
| CWY | ANTHEM BCBS – OHIO |
| CWZ | EMPIRE BCBS – NEW YORK |
| CXD | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CXE | BCBS – SOUTH CAROLINA |
| CXG | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CXK | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| CXM | HIGHMARK INC |
| CXN | HEALTHNOW NEW YORK INC – BUFFALO |
| CXO | BLUE ADVANTAGE ADMINS OF ARKANSAS |
| CXQ | WELLMARK OF IOWA/SOUTH DAKOTA |
| CXR | HIGHMARK INC |
| CXT | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CXU | ANTHEM BCBS – OHIO |
| CXZ | BLUE CROSS – IDAHO – BOISE |
| CYA | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CYC | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CYD | BLUE CROSS AND BLUE SHIELD-FLORIDA |
| CYF | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CYG | BLUE CROSS AND BLUE SHIELD-FLORIDA |
| CYK | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| CYN | HIGHMARK INC |
| CYQ | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CYS | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| CYW | ANTHEM BCBS – OHIO |
| CYY | PREMERA BLUE CROSS – SEATTLE WA |
| CZB | WELLMARK OF IOWA/SOUTH DAKOTA |
| CZC | ANTHEM BCBS – OHIO |
| CZD | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CZE | ANTHEM BLUE CROSS – CALIFORNIA |
| CZF | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| CZG | PREMERA BLUE CROSS – SEATTLE WA |
| CZH | BLUE CROSS BLUE SHIELD OF DELAWARE |
| CZJ | PREMERA BLUE CROSS – SEATTLE WA |
| CZK | ANTHEM BCBS – VIRGINIA |
| CZM | HIGHMARK INC |
| CZO | ANTHEM BCBS – OHIO |
| CZP | ANTHEM BCBS – OHIO |
| CZQ | ANTHEM BCBS – OHIO |
| CZR | WELLMARK OF IOWA/SOUTH DAKOTA |
| CZU | ANTHEM BLUE CROSS – CALIFORNIA |
| CZV | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| CZX | ANTHEM BCBS – OHIO |
| CZY | BCBS – NORTH CAROLINA |
