| F2K | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| F3B | Premera Blue Cross/Shared Admin | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| F4H | CBA Blue | VT | | | Prefix Listing (Updated 02.07.25), Blue Cross and Blue Shield of Vermont |
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| F5K | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| F9Z | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| FEC | Premera Blue Cross | AK | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| FHU | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| FIT | Premera Blue Cross/Shared Admin | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| FKK | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| FMR | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| FOA | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| FQA | Blue Cross and Blue Shield of Louisiana | LA | HMO/POS | | Louisiana Blue Professional Workshop Session B (Blue Cross and Blue Shield of Louisiana) |
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| FQT | Blue Cross and Blue Shield of Louisiana | LA | HMO/POS | | Louisiana Blue Professional Workshop Session B (Blue Cross and Blue Shield of Louisiana) |
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| FQW | Blue Cross and Blue Shield of Louisiana | LA | HMO/POS | | Louisiana Blue Professional Workshop Session B (Blue Cross and Blue Shield of Louisiana) |
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| FRJ | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| FSE | CBA Blue | VT | | | Prefix Listing (Updated 02.07.25), Blue Cross and Blue Shield of Vermont |
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| FSH | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| FSR | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| FVI | Anthem Blue Cross and Blue Shield (Virginia) | VA | | | Health Benefits - Human Resources - Virginia Commonwealth University |
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| FVT | Blue Cross and Blue Shield of Vermont | VT | Indemnity | | Prefix Listing (Updated 02.07.25), Blue Cross and Blue Shield of Vermont |
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| FZW | Premera Blue Cross | AK | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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