| Plan Identifier | Plan Name | |
|---|---|---|
| C8B | Blue Cross Blue Shield of Illinois | |
| C8C | Anthem BCBS of Missouri | |
| C8D | Anthem BCBS of Missouri | |
| C8F | Blue Cross Blue Shield of Massachusetts | |
| C8M | Blue Cross Blue Shield of Illinois | |
| C8S | Blue Cross Blue Shield of Minnesota | |
| C8T | Anthem BCBS of Nevada | |
| C8V | Anthem Blue Cross of California | |
| C8W | Blue Cross Blue Shield of Massachusetts | |
| C9A | BCBS of Western New York | |
| C9B | Blue Cross Blue Shield of Illinois | |
| C9C | Anthem BCBS of Connecticut | |
| C9D | Regence Blue Shield of Washington | |
| C9E | Anthem Blue Cross of California | |
| C9H | Blue Cross Blue Shield of Illinois | |
| C9R | Blue Cross Blue Shield of Texas | |
| C9S | Premera Blue Cross | |
| CAA | Carefirst BCBS of Maryland | |
| CAB | BCBS of Massachusetts | |
| CAC | Anthem Blue Cross of California | |
| CAD | Blue Cross Blue Shield of Massachusetts | |
| CAE | Empire Blue Cross Blue Shield | |
| CAF | BCBS of Mississippi | |
| CAG | Blue Shield of California | |
| CAH | Blue Cross Blue Shield of Georgia | |
| CAI | Anthem Blue Cross of California | |
| CAJ | Wellmark BCBS | |
| CAK | Blue Shield of California | |
| CAL | BCBS of Minnesota | |
| CAM | Highmark BCBS | |
| CAN | BCBS of Illinois | |
| CAO | Independence Blue Cross | |
| CAP | BCBS of Texas | |
| CAQ | Premera Blue Cross | |
| CAR | Wellmark BCBS | |
| CAS | BCBS of Texas | |
| CAT | Independence Blue Cross | |
| CAU | Carefirst BCBS | |
| CAV | Premera Blue Cross | |
| CAW | Blue Shield of California | |
| CAX | Anthem Blue Cross of California | |
| CAY | BCBS of Massachusetts | |
| CAZ | BCBS of Minnesota | |
| CBA | Anthem Blue Cross of California | |
| CBB | BCBS of Texas | |
| CBC | BCBS of Massachusetts | |
| CBD | Highmark BCBS | |
| CBE | Independence Blue Cross | |
| CBF | Anthem BCBS of Ohio | |
| CBG | BCBS of Alabama | |
| CBH | Anthem BCBS of Colorado | |
| CBI | Anthem BCBS of Ohio | |
| CBJ | BCBS of South Carolina | |
| CBK | Anthem BCBS of Ohio | |
| CBL | Unassigned Prefix | |
| CBM | Wellmark BCBS | |
| CBN | Blue Cross Blue Shield of Georgia | |
| CBO | BCBS of South Carolina | |
| CBP | Anthem BCBS of Ohio | |
| CBQ | Anthem Blue Cross of California | |
| CBR | BCBS of Wisconsin | |
| CBS | Anthem BCBS of New Hampshire | |
| CBT | Anthem BCBS of Ohio | |
| CBU | Horizon BCBS of New Jersey | |
| CBV | BCBS of South Carolina | |
| CBW | Anthem BCBS of Colorado | |
| CBX | Anthem BCBS of Ohio | |
| CBY | BCBS of Illinois | |
| CBZ | Horizon BCBS of New Jersey | |
| CCA | BCBS of Illinois | |
| CCB | Carefirst BCBS of Maryland | |
| CCC | Blue Cross of Idaho | |
| CCD | Blue Cross Blue Shield of South Carolina | |
| CCE | Unassigned Prefix | |
| CCF | BCBS of Illinois | |
| CCG | Unassigned Prefix | |
| CCH | Wellmark BCBS | |
| CCI | BCBS of Michigan | |
| CCJ | BCBS of Michigan | |
| CCK | BCBS of Minnesota | |
| CCL | BCBS of Illinois | |
| CCM | BCBS of Texas | |
| CCN | BCBS of Alabama | |
| CCO | Independence Administrators | |
| CCP | BCBS of Michigan | |
| CCQ | Independence Blue Cross | |
| CCR | Wellmark BCBS | |
| CCS | Unassigned Prefix | |
| CCT | Blue Cross of Idaho | |
| CCU | Anthem BCBS of Connecticut – Taft Hartley National Account | |
| CCV | Anthem Blue Cross of California | |
| CCW | Carefirst BCBS | |
| CCX | BCBS of Minnesota | |
| CCY | Wellmark BCBS | |
| CCZ | Blue Shield of California | |
| CDA | BCBS of Illinois | |
| CDB | Anthem Blue Cross of California | |
| CDC | BCBS of Arizona | |
| CDD | Carefirst Administrators | |
| CDE | BCBS of Texas |
| C2A | Blue Cross Blue Shield of Texas | |
| C2B | Highmark BCBS of Pennsylvania | |
| C2C | Blue Shield of Northeastern New York | |
| C2E | Premera Blue Cross | |
| C2F | Highmark BCBS of Pennsylvania | |
| C2G | Blue Cross Blue Shield of Minnesota | |
| C2H | Blue Cross Blue Shield of Alabama | |
| C2I | Highmark BCBS of Pennsylvania | |
| C2J | Blue Cross of California | |
| C2K | Blue Cross Blue Shield of Minnesota | |
| C2L | Highmark BCBS of Pennsylvania | |
| C2M | Blue Cross of California | |
| C2N | Highmark BCBS of Pennsylvania | |
| C2Q | Independence Blue Cross | |
| C2R | Blue Cross Blue Shield of Illinois | |
| C2S | Blue Cross Blue Shield of Illinois | |
| C2V | Premera Blue Cross | |
| C2W | Regence Blue Cross Blue Shield of Oregon | |
| C2Y | Blue Cross Blue Shield of Minnesota | |
| C2Z | Anthem Blue Cross of California | |
| C3A | Regence Blue Cross Blue Shield of Oregon | |
| C3C | Regence Blue Cross Blue Shield of Oregon | |
| C3D | Premera Blue Cross | |
| C3E | Blue Cross Blue Shield of Texas | |
| C3F | Highmark BCBS of Pennsylvania | |
| C3G | Anthem Blue Cross of California | |
| C3J | Anthem BCBS of Indiana | |
| C3K | Highmark BCBS of Pennsylvania | |
| C3L | Highmark BCBS of Pennsylvania | |
| C3M | Highmark BCBS of Pennsylvania | |
| C3N | Blue Cross Blue Shield of Texas | |
| C3S | Anthem BCBS of Virginia | |
| C3T | Regence Blue Cross Blue Shield of Oregon | |
| C3U | Anthem BCBS of Wisconsin | |
| C3V | Blue Cross Blue Shield of Illinois | |
| C3W | Regence Blue Cross Blue Shield of Oregon | |
| C3X | Anthem BCBS of Wisconsin | |
| C3Y | Empire Blue Cross Blue Shield | |
| C3Z | Empire Blue Cross Blue Shield | |
| C4A | Premera Blue Cross | |
| C4B | Anthem BCBS of Virginia | |
| C4C | Blue Cross Blue Shield of Texas | |
| C4D | Empire Blue Cross Blue Shield | |
| C4F | Anthem BCBS of Virginia | |
| C4G | Anthem BCBS of New Hampshire | |
| C4H | Regence Blue Shield of Washington | |
| C4L | Blue Cross Blue Shield of Texas | |
| C4M | Empire Blue Cross Blue Shield | |
| C4N | Independence Blue Cross | |
| C4P | Blue Cross Blue Shield of Texas | |
| C4R | Premera Blue Cross | |
| C4T | Anthem BCBS of Ohio | |
| C4U | Blue Cross Blue Shield of Oklahoma | |
| C4V | Anthem BCBS of Georgia | |
| C4W | BCBS of Western New York | |
| C5A | Anthem Blue Cross of California | |
| C5B | Blue Cross Blue Shield of Illinois | |
| C5C | Blue Cross Blue Shield of Arkansas | |
| C5D | Blue Cross Blue Shield of Illinois | |
| C5G | Anthem Blue Cross of California | |
| C5H | Anthem Blue Cross of California | |
| C5J | Anthem Blue Cross of California | |
| C5K | Blue Shield of Northeastern New York | |
| C5L | Blue Cross Blue Shield of Illinois | |
| C5M | Anthem BCBS of Georgia | |
| C5R | Anthem BCBS of Connecticut | |
| C5S | Anthem BCBS of Colorado | |
| C5T | Anthem BCBS of Missouri | |
| C5U | Anthem BCBS of Colorado | |
| C5W | Anthem BCBS of Georgia | |
| C5Z | BCBS of Western New York | |
| C6A | Anthem Blue Cross of California | |
| C6B | Anthem BCBS of New Hampshire | |
| C6C | Anthem BCBS of Virginia | |
| C6D | Anthem BCBS of New Hampshire | |
| C6E | Anthem BCBS of New Hampshire | |
| C6F | Blue Cross Blue Shield of Illinois | |
| C6G | Anthem BCBS of New Hampshire | |
| C6H | Anthem BCBS of Virginia | |
| C6J | Blue Cross Blue Shield of Illinois | |
| C6L | Horizon Blue Cross Blue Shield of New Jersey | |
| C6P | Regence Blue Cross Blue Shield of Oregon | |
| C6R | Empire Blue Cross Blue Shield | |
| C6S | Anthem BCBS of Virginia | |
| C6T | Regence Blue Cross Blue Shield of Oregon | |
| C6W | Anthem BCBS of Georgia | |
| C7A | Anthem Blue Cross of California | |
| C7B | Blue Cross Blue Shield of Illinois | |
| C7C | Blue Cross Blue Shield of Minnesota | |
| C7D | Blue Cross Blue Shield of Illinois | |
| C7E | Anthem BCBS of Colorado | |
| C7F | Blue Cross Blue Shield of Illinois | |
| C7M | Anthem BCBS of Wisconsin | |
| C7N | Anthem BCBS of Wisconsin | |
| C7S | Blue Cross Blue Shield of Minnesota | |
| C7T | Anthem BCBS of Ohio | |
| C7W | Anthem BCBS of Colorado | |
| C7X | Anthem BCBS of Colorado | |
| C7Y | Regence Blue Shield of Washington | |
| C8A | Anthem Blue Cross of California |
| CDF | Anthem BCBS of Kentucky | |
| CDG | Wellmark BCBS | |
| CDH | Unassigned Prefix | |
| CDI | CareFirst BCBS | |
| CDJ | Anthem BCBS of Indiana | |
| CDK | Empire BCBS of New York | |
| CDL | Carefirst BCBS of Maryland | |
| CDM | Highmark BCBS | |
| CDN | Blue Advantage Administrators of Arkansas | |
| CDO | Wellmark BCBS | |
| CDP | Wellmark BCBS | |
| CDQ | Independence Blue Cross | |
| CDR | Carefirst BCBS of Maryland | |
| CDS | Blue Shield of Northeastern New York | |
| CDT | BCBS of Minnesota | |
| CDU | BCBS of Illinois | |
| CDV | BCBS of South Carolina | |
| CDW | BCBS of Massachusetts | |
| CDX | BCBS of Illinois | |
| CDY | Carefirst Administrators | |
| CDZ | Independence Blue Cross | |
| CEA | Anthem BCBS of Virginia | |
| CEB | Wellmark BCBS | |
| CEC | BCBS of Minnesota | |
| CED | BCBS of Illinois | |
| CEE | BCBS of Texas | |
| CEF | Anthem BCBS of Ohio | |
| CEG | Carefirst BCBS of Maryland | |
| CEH | Blue Cross Blue Shield of Massachusetts | |
| CEI | CareFirst BCBS | |
| CEJ | BCBS of Illinois | |
| CEK | Regence Blue Cross Blue Shield of Utah | |
| CEL | BCBS of Massachusetts | |
| CEM | Anthem Blue Cross of California | |
| CEN | Unassigned Prefix | |
| CEO | BCBS of Nebraska | |
| CEP | BCBS of Illinois | |
| CEQ | Wellmark BCBS | |
| CER | Unassigned Prefix | |
| CES | BCBS of South Carolina | |
| CET | Blue Shield of California | |
| CEU | BCBS of Alabama | |
| CEV | BCBS of Minnesota | |
| CEW | Wellmark BCBS | |
| CEX | BCBS of Illinois | |
| CEY | BCBS of Illinois | |
| CEZ | BCBS of Illinois | |
| CFA | Independence Blue Cross | |
| CFB | Wellmark BCBS | |
| CFC | Anthem BCBS of Georgia | |
| CFD | Anthem BCBS of Ohio | |
| CFE | BCBS of South Carolina | |
| CFF | Highmark BCBS | |
| CFG | Unassigned Prefix | |
| CFH | Anthem Blue Cross of California | |
| CFI | Carefirst BCBS of Maryland | |
| CFJ | Wellmark BCBS | |
| CFK | Wellmark BCBS | |
| CFL | BCBS of South Carolina | |
| CFM | BCBS of Massachusetts | |
| CFN | BCBS of Massachusetts | |
| CFO | Carefirst BCBS of Maryland | |
| CFP | Anthem Blue Cross of California | |
| CFQ | Blue Cross of Idaho | |
| CFR | BCBS of Illinois | |
| CFS | Horizon Blue Cross Blue Shield of New Jersey | |
| CFT | Empire Blue Cross Blue Shield | |
| CFU | CareFirst BCBS | |
| CFV | Wellmark BCBS | |
| CFW | BCBS of Massachusetts | |
| CFX | Premera Blue Cross | |
| CFY | Anthem BCBS of Ohio | |
| CFZ | Anthem BCBS of Ohio | |
| CGA | Anthem Blue Cross of California | |
| CGB | BCBS of Texas | |
| CGC | BCBS of South Carolina | |
| CGD | Blue Shield of California | |
| CGE | BCBS of Texas | |
| CGF | BCBS of Arizona | |
| CGG | Anthem BCBS of Kentucky | |
| CGH | Anthem BCBS of Missouri | |
| CGI | Wellmark BCBS | |
| CGJ | BCBS of Massachusetts | |
| CGK | Carefirst BCBS of Maryland | |
| CGL | BCBS of Minnesota | |
| CGM | Carefirst Administrators | |
| CGN | BCBS of Nebraska | |
| CGO | BCBS of Illinois | |
| CGP | Excellus BCBS of New York | |
| CGQ | BCBS of North Carolina | |
| CGR | Carefirst BCBS of Maryland | |
| CGS | Anthem BCBS of Missouri | |
| CGT | Unassigned Prefix | |
| CGU | Unassigned Prefix | |
| CGV | Carefirst BCBS of Maryland | |
| CGW | BCBS of Minnesota | |
| CGX | Anthem BCBS of Missouri | |
| CGY | BCBS of Florida | |
| CGZ | Anthem BCBS of Ohio | |
| CHA | BCBS of Alabama |
| CHB | BCBS of Massachusetts | |
| CHC | Carefirst BCBS | |
| CHD | Highmark BCBS of Pennsylvania | |
| CHE | BCBS of Nebraska | |
| CHF | BCBS of Texas | |
| CHG | BCBS of Illinois | |
| CHH | BCBS of Tennessee | |
| CHI | Unassigned Prefix | |
| CHJ | Unassigned Prefix | |
| CHK | Wellmark BCBS | |
| CHL | Anthem BCBS of Ohio | |
| CHM | Blue Cross Blue Shield of Nebraska | |
| CHN | Unassigned Prefix | |
| CHO | BCBS of South Carolina | |
| CHP | Capital Blue Cross | |
| CHQ | Anthem Blue Cross of California | |
| CHR | BCBS of Illinois | |
| CHS | BCBS of North Carolina | |
| CHT | BCBS of Tennessee | |
| CHU | Carefirst BCBS of Maryland | |
| CHV | BCBS of Illinois | |
| CHW | BCBS of South Carolina | |
| CHX | Unassigned Prefix | |
| CHY | BCBS of South Carolina | |
| CHZ | BCBS of Minnesota | |
| CIA | Carefirst Administrators | |
| CIB | BCBS of Illinois | |
| CIC | Carefirst BCBS of Maryland | |
| CID | BCBS of North Carolina | |
| CIE | Wellmark BCBS | |
| CIF | BCBS of Illinois | |
| CIG | Unassigned Prefix | |
| CIH | Carefirst BCBS of Maryland | |
| CII | Anthem Blue Cross of California | |
| CIJ | Blue Cross of Idaho | |
| CIK | Capital Blue Cross | |
| CIL | BCBS of South Carolina | |
| CIM | Blue Shield of California | |
| CIN | Carefirst BCBS | |
| CIO | Capital Blue Cross | |
| CIP | BCBS of Alabama | |
| CIQ | BCBS of Tennessee | |
| CIR | Premera Blue Cross | |
| CIS | Regence Blue Shield of Washington | |
| CIT | Blue Cross Blue Shield of South Carolina | |
| CIU | Anthem BCBS of Virginia | |
| CIV | Capital Blue Cross | |
| CIW | Anthem BCBS of Ohio | |
| CIX | Anthem BCBS of Missouri | |
| CIY | BCBS of South Carolina | |
| CIZ | CareFirst BCBS | |
| CJA | Independence Blue Cross | |
| CJB | BCBS of Illinois | |
| CJC | BCBS of Nebraska | |
| CJD | Anthem Blue Cross of California | |
| CJE | Empire BCBS of New York | |
| CJF | BCBS of Nebraska | |
| CJG | BCBS of Kansas City | |
| CJH | BCBS of North Carolina | |
| CJI | Highmark BCBS of West Virginia | |
| CJJ | Premera Blue Cross of Washington | |
| CJK | BCBS of Massachusetts | |
| CJL | Empire BCBS of New York | |
| CJM | BCBS of Florida | |
| CJN | BCBS of Florida | |
| CJO | Anthem BCBS of Ohio | |
| CJP | Horizon BCBS of New Jersey | |
| CJQ | Blue Cross of Idaho | |
| CJR | Anthem BCBS of Wisconsin | |
| CJS | BCBS of Illinois | |
| CJT | BCBS of Texas | |
| CJU | BCBS of Illinois | |
| CJV | Empire BCBS of New York | |
| CJW | Regence Blue Cross Blue Shield of Oregon | |
| CJX | Anthem BCBS of Ohio | |
| CJY | Anthem BCBS of Ohio | |
| CJZ | Wellmark BCBS | |
| CKA | CareFirst BCBS | |
| CKB | Anthem BCBS of Ohio | |
| CKC | Anthem BCBS of Connecticut | |
| CKD | BCBS of North Carolina | |
| CKE | BCBS of Western New York | |
| CKF | Blue Cross of Idaho | |
| CKG | BCBS of Tennessee | |
| CKH | Anthem BCBS of Indiana | |
| CKI | Anthem Blue Cross of California | |
| CKJ | Anthem BCBS of Ohio | |
| CKK | Highmark BCBS | |
| CKL | Carefirst Administrators | |
| CKM | Highmark BCBS | |
| CKN | Regence Blue Cross Blue Shield of Utah | |
| CKO | BCBS of Massachusetts | |
| CKP | BCBS of Texas | |
| CKQ | Anthem BCBS of Ohio | |
| CKR | BCBS of Tennessee | |
| CKS | Anthem BCBS of Missouri | |
| CKT | Unassigned Prefix | |
| CKU | Anthem BCBS of Ohio | |
| CKV | Anthem BCBS of Ohio | |
| CKW | Anthem BCBS of Ohio |
| CKX | Unassigned Prefix | |
| CKY | Blue Shield of California | |
| CKZ | Premera Blue Cross | |
| CLA | BCBS of Illinois | |
| CLB | BCBS of Illinois | |
| CLC | BCBS of South Carolina | |
| CLD | Anthem BCBS of Georgia | |
| CLE | BCBS of Texas | |
| CLF | Anthem BCBS of Georgia | |
| CLG | Carefirst BCBS | |
| CLH | Excellus BCBS of New York | |
| CLI | Wellmark BCBS | |
| CLJ | Anthem BCBS of Ohio | |
| CLK | Empire BCBS of New York | |
| CLL | Anthem Blue Cross of California | |
| CLM | Wellmark BCBS | |
| CLN | BCBS of South Carolina | |
| CLO | BCBS of Mississippi | |
| CLP | BCBS of Illinois | |
| CLQ | Anthem BCBS of Virginia | |
| CLR | Premera Blue Cross of Washington | |
| CLS | BCBS of Massachusetts | |
| CLT | Wellmark BCBS | |
| CLU | Anthem BCBS of Virginia | |
| CLV | CareFirst BCBS | |
| CLW | Anthem Blue Cross of California | |
| CLX | Premera Blue Cross | |
| CLY | Wellmark BCBS | |
| CLZ | Carefirst BCBS of Maryland | |
| CMA | BCBS of Michigan | |
| CMB | Anthem BCBS of Virginia | |
| CMC | Wellmark BCBS | |
| CMD | BCBS of Georgia | |
| CME | BCBS of Illinois | |
| CMF | Wellmark BCBS | |
| CMG | Wellmark BCBS | |
| CMH | BCBS of Tennessee | |
| CMI | Independence Blue Cross | |
| CMJ | Anthem BCBS of Ohio | |
| CMK | Anthem BCBS of Ohio | |
| CML | Unassigned Prefix | |
| CMM | BCBS of Massachusetts | |
| CMN | Blue Shield of Northeastern New York | |
| CMO | BCBS of Arizona | |
| CMP | BCBS of Minnesota | |
| CMQ | Regence BCBS of Oregon | |
| CMR | BCBS of Illinois | |
| CMS | BCBS of Massachusetts | |
| CMT | Unassigned Prefix | |
| CMU | Highmark BCBS of Pennsylvania | |
| CMV | Blue Shield of California | |
| CMW | Wellmark BCBS | |
| CMX | Excellus BCBS of New York | |
| CMY | Blue Cross of Idaho | |
| CMZ | Anthem BCBS of Ohio | |
| CNA | Premera Blue Cross | |
| CNB | Anthem BCBS of Ohio | |
| CNC | BCBS of Illinois | |
| CND | BCBS of Minnesota | |
| CNE | Wellmark BCBS | |
| CNF | Wellmark BCBS | |
| CNG | Highmark BCBS | |
| CNH | Anthem BCBS of Ohio | |
| CNI | BCBS of Texas | |
| CNJ | BCBS of South Carolina | |
| CNK | Wellmark BCBS | |
| CNL | BCBS of Illinois | |
| CNM | Highmark BCBS | |
| CNN | Highmark BCBS | |
| CNO | Anthem Blue Cross of California | |
| CNP | BCBS of Western New York | |
| CNQ | Anthem Blue Cross of California | |
| CNR | Carefirst BCBS | |
| CNS | Unassigned Prefix | |
| CNT | BCBS of Illinois | |
| CNU | Carefirst BCBS | |
| CNV | BCBS of Illinois | |
| CNW | Carefirst BCBS | |
| CNX | BCBS of Minnesota | |
| CNY | Anthem BCBS of Virginia | |
| CNZ | BCBS of Illinois | |
| COA | Capital Blue Cross | |
| COB | BCBS of Texas | |
| COC | Carefirst BCBS of Maryland | |
| COD | Anthem BCBS of Ohio | |
| COE | Anthem Blue Cross of California | |
| COF | Unassigned Prefix | |
| COG | Anthem BCBS of Colorado | |
| COH | Empire BCBS of New York | |
| COI | Unassigned Prefix | |
| COJ | BCBS of Alabama | |
| COK | Unassigned Prefix | |
| COL | Highmark BCBS | |
| COM | BCBS of Alabama | |
| CON | BCBS of Massachusetts | |
| COO | BCBS of Minnesota | |
| COP | BCBS of Alabama | |
| COQ | Independence Blue Cross | |
| COR | Blue Shield of California | |
| COS | Independence Blue Cross |
| COT | Blue Cross of Idaho | |
| COU | BCBS of Texas | |
| COV | BCBS of Arizona | |
| COW | Highmark BCBS | |
| COX | Blue Shield of California | |
| COY | Capital Blue Cross | |
| COZ | Highmark BCBS | |
| CPA | BCBS of Minnesota | |
| CPB | Carefirst Administrators | |
| CPC | BCBS of Alabama | |
| CPD | BCBS of Massachusetts | |
| CPE | BCBS of Illinois | |
| CPF | BCBS of South Carolina | |
| CPG | Blue Shield of Northeastern New York | |
| CPH | BCBS of Illinois | |
| CPI | BCBS of Minnesota | |
| CPJ | Carefirst Administrators | |
| CPK | Regence BCBS of Washington | |
| CPL | BCBS of Kansas City | |
| CPM | Carefirst BCBS | |
| CPN | Carefirst BCBS | |
| CPO | BCBS of Texas | |
| CPP | Wellmark BCBS | |
| CPQ | Anthem Blue Cross of California | |
| CPR | Anthem Blue Cross of California | |
| CPS | BCBS of Alabama | |
| CPT | Anthem Blue Cross of California | |
| CPU | BCBS of Nebraska | |
| CPV | Anthem Blue Cross of California | |
| CPW | Wellmark BCBS | |
| CPX | BCBS of South Carolina | |
| CPY | BCBS of Illinois | |
| CPZ | Blue Shield of Northeastern New York | |
| CQA | Independence Blue Cross | |
| CQB | Anthem Blue Cross of California | |
| CQC | Unassigned Prefix | |
| CQD | BCBS of South Carolina | |
| CQE | BCBS of Missouri | |
| CQF | BCBS of South Carolina | |
| CQG | Anthem Blue Cross of California | |
| CQH | Regence BCBS of Oregon | |
| CQI | Carefirst BCBS of Maryland | |
| CQJ | BCBS of Texas | |
| CQK | Blue Shield of California | |
| CQL | Anthem Blue Cross of California | |
| CQM | Highmark BCBS | |
| CQN | Blue Shield of California | |
| CQO | Carefirst BCBS of Maryland | |
| CQP | Carefirst BCBS of Maryland | |
| CQQ | Anthem BCBS of Colorado | |
| CQR | Anthem Blue Cross of California | |
| CQS | BCBS of Western New York | |
| CQT | Carefirst BCBS of Maryland | |
| CQU | Carefirst BCBS of Maryland | |
| CQV | Wellmark BCBS | |
| CQW | BCBS of Minnesota | |
| CQX | Independence Blue Cross | |
| CQY | Wellmark BCBS | |
| CQZ | Blue Cross of Idaho | |
| CRA | Capital Blue Cross | |
| CRB | BCBS of Minnesota | |
| CRC | Capital Blue Cross | |
| CRD | BCBS of Minnesota | |
| CRE | Blue Shield of California | |
| CRF | BCBS of South Carolina | |
| CRG | BCBS of Texas | |
| CRH | BCBS of Michigan | |
| CRI | Anthem BCBS of Ohio | |
| CRJ | Premera Blue Cross | |
| CRK | BCBS of Texas | |
| CRL | Excellus BCBS of New York | |
| CRM | BCBS of Illinois | |
| CRN | BCBS of South Carolina | |
| CRO | Anthem BCBS of Virginia | |
| CRP | BCBS of Illinois | |
| CRQ | Anthem BCBS of Wisconsin | |
| CRR | Anthem BCBS of Ohio | |
| CRS | Premera Blue Cross | |
| CRT | BCBS of Nebraska | |
| CRU | BCBS of Western New York | |
| CRV | Unassigned Prefix | |
| CRW | BCBS of Nebraska | |
| CRX | BCBS of North Carolina | |
| CRY | BCBS of Tennessee | |
| CRZ | BCBS of Texas | |
| CSA | BCBS of Alabama | |
| CSB | BCBS of Illinois | |
| CSC | BCBS of South Carolina | |
| CSD | Carefirst BCBS of Maryland | |
| CSE | Unassigned Prefix | |
| CSF | Anthem BCBS of Colorado | |
| CSG | Anthem BCBS of Georgia | |
| CSH | Anthem BCBS of Georgia | |
| CSI | BCBS of Kansas City | |
| CSJ | Anthem BCBS of Missouri | |
| CSK | Wellmark BCBS | |
| CSL | Horizon BCBS of New Jersey | |
| CSM | BCBS of Arkansas Blue Advantage | |
| CSN | Independence Blue Cross | |
| CSO | Carefirst BCBS of Maryland |
| CSP | Excellus BCBS of New York | |
| CSQ | Anthem BCBS of Missouri | |
| CSR | Blue Shield of California | |
| CSS | Anthem BCBS of Colorado | |
| CST | Anthem BCBS of Colorado | |
| CSU | Regence BCBS of Utah | |
| CSV | Anthem BCBS of Virginia | |
| CSW | BCBS of Nebraska | |
| CSX | Wellmark BCBS | |
| CSY | Anthem Blue Cross of California | |
| CSZ | BCBS of South Carolina | |
| CT2 | Assigned | |
| CT5 | Assigned | |
| CTA | BCBS of Massachusetts | |
| CTB | BCBS of South Carolina | |
| CTC | BCBS of Oklahoma | |
| CTD | Anthem BCBS of Georgia | |
| CTE | Blue Cross of Idaho | |
| CTF | BCBS of Minnesota | |
| CTG | Unassigned Prefix | |
| CTH | BCBS of South Carolina | |
| CTI | BCBS of Massachusetts | |
| CTJ | Anthem BCBS of Indiana | |
| CTK | Capital Blue Cross | |
| CTL | BCBS of Illinois | |
| CTM | Blue Cross of Idaho | |
| CTN | Anthem BCBS of Connecticut | |
| CTO | Blue Shield of California | |
| CTP | Anthem BCBS of Connecticut | |
| CTQ | BCBS of Western New York | |
| CTR | Anthem BCBS of Indiana | |
| CTS | BCBS of Nebraska | |
| CTT | Premera Blue Cross | |
| CTU | Blue Shield of California | |
| CTV | BCBS of Massachusetts | |
| CTW | Premera Blue Cross of Washington | |
| CTX | Blue Shield of California | |
| CTY | BCBS of Illinois | |
| CTZ | BCBS of Arizona | |
| CUA | Unassigned Prefix | |
| CUB | Excellus BCBS of New York | |
| CUC | BCBS of Illinois | |
| CUD | BCBS of Massachusetts | |
| CUE | Unassigned Prefix | |
| CUF | Blue Shield of California | |
| CUG | Wellmark BCBS | |
| CUH | Anthem BCBS of Colorado | |
| CUI | Independence Blue Cross | |
| CUJ | BCBS of South Carolina | |
| CUK | BCBS of Alabama | |
| CUL | Blue Shield of California | |
| CUM | Unassigned Prefix | |
| CUN | Highmark BCBS | |
| CUO | Independence Blue Cross | |
| CUP | Wellmark BCBS | |
| CUQ | Blue Shield of California | |
| CUR | BCBS of Western New York | |
| CUS | Independence Blue Cross | |
| CUT | BCBS of Illinois | |
| CUU | BCBS of Texas | |
| CUV | BCBS of Illinois | |
| CUW | Wellmark BCBS | |
| CUX | Regence Blue Shield of Idaho | |
| CUY | Regence Blue Shield of Washington | |
| CUZ | Anthem BCBS of Ohio | |
| CVA | Anthem BCBS of Ohio | |
| CVB | BCBS of Florida | |
| CVC | BCBS of Illinois | |
| CVD | Carefirst Administrators | |
| CVE | Anthem BCBS of Ohio | |
| CVF | Anthem BCBS of Ohio | |
| CVG | Anthem BCBS of Ohio | |
| CVH | Unassigned Prefix | |
| CVI | BCBS of Alabama | |
| CVJ | BCBS of Florida | |
| CVK | BCBS of Florida | |
| CVL | Regence BCBS of Oregon | |
| CVM | Anthem BCBS of Wisconsin | |
| CVN | Anthem BCBS of Wisconsin | |
| CVO | Anthem BCBS of Virginia | |
| CVP | Anthem BCBS of Ohio | |
| CVQ | Anthem BCBS of Ohio | |
| CVR | Anthem BCBS of Ohio | |
| CVS | Wellmark BCBS | |
| CVT | Carefirst BCBS of Maryland | |
| CVU | Anthem BCBS of Virginia | |
| CVV | Carefirst BCBS of Maryland | |
| CVW | Blue Shield of California | |
| CVX | BCBS of Illinois | |
| CVY | Anthem BCBS of Ohio | |
| CVZ | Wellmark BCBS | |
| CWA | Carefirst BCBS of Maryland | |
| CWB | Anthem BCBS of Ohio | |
| CWC | Unassigned Prefix | |
| CWD | Wellmark BCBS | |
| CWE | BCBS of Michigan | |
| CWF | Blue Cross of Idaho | |
| CWG | Anthem BCBS of Ohio | |
| CWH | Anthem BCBS of Missouri | |
| CWI | Blue Shield of California |
| CWJ | BCBS of Alabama | |
| CWK | BCBS of Massachusetts | |
| CWL | BCBS of Illinois | |
| CWM | Highmark BCBS | |
| CWN | Carefirst BCBS of Maryland | |
| CWO | BCBS of Massachusetts | |
| CWP | BCBS of Texas | |
| CWQ | Anthem BCBS of Ohio | |
| CWR | Anthem BCBS of Georgia | |
| CWS | BCBS of Texas | |
| CWT | BCBS of Texas | |
| CWU | Carefirst Administrators | |
| CWV | Carefirst Administrators | |
| CWW | Wellmark BCBS | |
| CWX | Anthem BCBS of Wisconsin | |
| CWY | Anthem BCBS of Missouri | |
| CWZ | Empire BCBS of New York | |
| CXA | Premera Blue Cross | |
| CXB | Carefirst BCBS of Maryland | |
| CXC | BCBS of Rhose Island | |
| CXD | BCBS of Illinois | |
| CXE | BCBS of South Carolina | |
| CXF | Premera Blue Cross | |
| CXG | BCBS of Massachusetts | |
| CXH | BCBS of Minnesota | |
| CXI | BCBS of Nebraska | |
| CXJ | Excellus BCBS of New York | |
| CXK | BCBS of Texas | |
| CXL | Unassigned Prefix | |
| CXM | Highmark BCBS | |
| CXN | BCBS of South Carolina | |
| CXO | BCBS of Arkansas Blue Advantage | |
| CXP | BCBS of Texas | |
| CXQ | Wellmark BCBS | |
| CXR | Highmark BCBS | |
| CXS | Anthem BCBS of Georgia | |
| CXT | BCBS of Illinois | |
| CXU | Unassigned Prefix | |
| CXV | Blue Shield of California | |
| CXW | BCBS of South Carolina | |
| CXX | Blue Shield of California | |
| CXY | Unassigned Prefix | |
| CXZ | Carefirst BCBS of Maryland | |
| CYA | BCBS of Illinois | |
| CYB | Blue Shield of California | |
| CYC | BCBS of Illinois | |
| CYD | BCBS of Florida | |
| CYE | Regence BCBS of Utah | |
| CYF | Carefirst BCBS | |
| CYG | BCBS of Florida | |
| CYH | BCBS of Georgia | |
| CYI | BCBS of Massachusetts | |
| CYJ | Anthem BCBS of Georgia | |
| CYK | BCBS of South Carolina | |
| CYL | BCBS of Illinois | |
| CYM | Anthem Blue Cross of California | |
| CYN | Highmark BCBS | |
| CYO | BCBS of Massachusetts | |
| CYP | BCBS of Illinois | |
| CYQ | BCBS of Illinois | |
| CYR | BCBS of Illinois | |
| CYS | BCBS of Illinois | |
| CYT | Anthem BCBS of Georgia | |
| CYU | Empire BCBS of New York | |
| CYV | Regence BCBS of Washington | |
| CYW | Unassigned Prefix | |
| CYX | BCBS of Tennessee | |
| CYY | BCBS of South Carolina | |
| CYZ | Regence BCBS of Washington | |
| CZA | Anthem BCBS of Kentucky | |
| CZB | Anthem BCBS of Kentucky | |
| CZC | Anthem BCBS of Connecticut | |
| CZD | Unassigned Prefix | |
| CZE | BCBS of Texas | |
| CZF | Unassigned Prefix | |
| CZG | Carefirst Administrators | |
| CZH | Anthem BCBS of Connecticut | |
| CZI | Blue Shield of California | |
| CZJ | Premera Blue Cross | |
| CZK | Anthem BCBS of Virginia | |
| CZL | Unassigned Prefix | |
| CZM | Unassigned Prefix | |
| CZN | Independence Blue Cross | |
| CZO | Carefirst BCBS | |
| CZP | Anthem BCBS of Ohio | |
| CZQ | Anthem BCBS of Ohio | |
| CZR | Wellmark BCBS | |
| CZS | Independence Blue Cross | |
| CZT | Anthem BCBS of Connecticut | |
| CZU | Anthem Blue Cross of California | |
| CZV | Independence Blue Cross | |
| CZW | BCBS of Minnesota | |
| CZX | Unassigned Prefix | |
| CZY | BCBS of North Carolina | |
| CZZ | Highmark BCBS |