| R2C | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| R2I | Blue Cross & Blue Shield of Rhode Island | RI | | | State of Rhode Island prefix reminder, Blue Cross & Blue Shield of Rhode Island provider update |
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| R3C | CBA Blue | VT | | | Prefix Listing (Updated 02.07.25), Blue Cross and Blue Shield of Vermont |
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| R3D | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| R3W | Premera Blue Cross/Shared Admin | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| R4D | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| R6P | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| R8F | CBA Blue | VT | | | Prefix Listing (Updated 02.07.25), Blue Cross and Blue Shield of Vermont |
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| R9N | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| REZ | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| RFY | Blue Cross Blue Shield of Michigan | MI | | | 2026 Blue Cross products at a glance (For Blue Cross commercial, Medicare Plus Blue and Blue Cross Complete) - Blue Cross Blue Shield of Michigan |
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| RGJ | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| RHX | CBA Blue | VT | | | Prefix Listing (Updated 02.07.25), Blue Cross and Blue Shield of Vermont |
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| RIA | Blue Cross & Blue Shield of Rhode Island | RI | | | 2025 Monthly Provider Conference Call FAQ's, Blue Cross & Blue Shield of Rhode Island |
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| RIN | Blue Cross & Blue Shield of Rhode Island | RI | | | 2025 Monthly Provider Conference Call FAQ's, Blue Cross & Blue Shield of Rhode Island |
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| RIS | Blue Cross & Blue Shield of Rhode Island | RI | | | New membership effective January 1, 2020, Blue Cross & Blue Shield of Rhode Island provider updateSource dated before 2022 |
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| RKE | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| RKL | CBA Blue | VT | | | Prefix Listing (Updated 02.07.25), Blue Cross and Blue Shield of Vermont |
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| RMQ | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
|---|
| RMS | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| RQZ | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| RUJ | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| RVR | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| RZG | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| RZU | Premera Blue Cross HMO | WA | HMO | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| RZX | Premera Blue Cross HMO | WA | HMO | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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