| Q4C | CBA Blue | VT | | | Prefix Listing (Updated 02.07.25), Blue Cross and Blue Shield of Vermont |
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| Q5Q | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| Q9S | CBA Blue | VT | | | Prefix Listing (Updated 02.07.25), Blue Cross and Blue Shield of Vermont |
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| QAC | Independence Blue Cross | PA | HMO | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QAM | Independence Blue Cross | PA | Medicare Advantage HMO-POS | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QAQ | Independence Blue Cross | PA | EPO | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QAZ | Independence Blue Cross | PA | EPO | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QBB | Blue Cross and Blue Shield of Louisiana | LA | POS | | Louisiana Blue Professional Workshop Session B (Blue Cross and Blue Shield of Louisiana) |
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| QBE | Blue Cross and Blue Shield of Louisiana | LA | POS | | Louisiana Blue Professional Workshop Session B (Blue Cross and Blue Shield of Louisiana) |
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| QBG | Blue Cross and Blue Shield of Louisiana | LA | POS | | Louisiana Blue Professional Workshop Session B (Blue Cross and Blue Shield of Louisiana) |
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| QBJ | Independence Blue Cross | PA | PPO | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QBS | Blue Cross and Blue Shield of Louisiana | LA | POS | | Louisiana Blue Professional Workshop Session B (Blue Cross and Blue Shield of Louisiana) |
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| QBU | Independence Blue Cross | PA | Exchange/Marketplace | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QBW | Independence Blue Cross | PA | HMO | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QBY | Independence Blue Cross | PA | EPO | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QBZ | Independence Blue Cross | PA | EPO | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QCG | Independence Blue Cross | PA | POS | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QCH | Independence Blue Cross | PA | HMO | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QCI | Independence Blue Cross | PA | Medicare Advantage HMO | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QCJ | Independence Blue Cross | PA | POS | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QCK | Independence Blue Cross | PA | Medicare Advantage HMO-POS | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QCL | Independence Blue Cross | PA | HMO | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QCM | Independence Blue Cross | PA | Medicare Advantage HMO | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QEB | Independence Blue Cross | PA | Exchange/Marketplace | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QEN | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| QFP | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| QHR | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| QHU | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| QHX | Independence Blue Cross | PA | HMO | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QMC | Blue Cross and Blue Shield of Illinois | IL | HMO | | Networks and Benefit Plans: HMO Networks (HMO Illinois, Blue Advantage HMO, Blue Precision HMO, BlueCare Direct) - Blue Cross and Blue Shield of Illinois |
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| QMD | Blue Cross and Blue Shield of Illinois | IL | Exchange/Marketplace | | Networks and Benefit Plans: HMO Networks (HMO Illinois, Blue Advantage HMO, Blue Precision HMO, BlueCare Direct) - Blue Cross and Blue Shield of Illinois |
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| QME | Blue Cross and Blue Shield of Illinois | IL | PPO | | Networks and Benefit Plans: Blue Choice PPO and PPO Networks - Blue Cross and Blue Shield of Illinois |
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| QMF | Blue Cross and Blue Shield of Illinois | IL | Exchange/Marketplace | | Networks and Benefit Plans: Blue Choice PPO and PPO Networks - Blue Cross and Blue Shield of Illinois |
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| QMG | Blue Cross and Blue Shield of Illinois | IL | PPO | | Networks and Benefit Plans: Blue Choice PPO and PPO Networks - Blue Cross and Blue Shield of Illinois |
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| QML | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| QND | Independence Blue Cross | PA | Exchange/Marketplace | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QSP | Independence Blue Cross | PA | HMO | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QST | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| QSX | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| QSY | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| QTH | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| QTV | Premera Blue Cross | WA | | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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| QWE | Independence Blue Cross | PA | HMO | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QWM | Independence Blue Cross | PA | Medicare Advantage HMO | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QWN | Independence Blue Cross | PA | POS | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QWY | Blue Cross Blue Shield of Wyoming | WY | | | Policies and Procedures: A Manual for In-network Health Care Professionals and Hospitals (Blue Cross Blue Shield of Wyoming), Revised February 1, 2024 |
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| QXA | CareFirst BlueCross BlueShield | Multi-state | | | Provider Quick Reference Guide (CareFirst BlueCross BlueShield, CUT6010-1E) |
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| QXB | CareFirst BlueCross BlueShield | Multi-state | | | Provider Quick Reference Guide (CareFirst BlueCross BlueShield, CUT6010-1E) |
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| QXC | CareFirst BlueCross BlueShield | Multi-state | | | Provider Quick Reference Guide (CareFirst BlueCross BlueShield, CUT6010-1E) |
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| QXD | CareFirst BlueCross BlueShield | Multi-state | | | Provider Quick Reference Guide (CareFirst BlueCross BlueShield, CUT6010-1E) |
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| QXE | CareFirst BlueCross BlueShield | Multi-state | | | Provider Quick Reference Guide (CareFirst BlueCross BlueShield, CUT6010-1E) |
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| QXF | CareFirst BlueCross BlueShield | Multi-state | | | Provider Quick Reference Guide (CareFirst BlueCross BlueShield, CUT6010-1E) |
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| QXG | CareFirst BlueCross BlueShield | Multi-state | | | Provider Quick Reference Guide (CareFirst BlueCross BlueShield, CUT6010-1E) |
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| QXH | CareFirst BlueCross BlueShield | Multi-state | | | Provider Quick Reference Guide (CareFirst BlueCross BlueShield, CUT6010-1E) |
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| QXI | CareFirst BlueCross BlueShield | Multi-state | | | Provider Quick Reference Guide (CareFirst BlueCross BlueShield, CUT6010-1E) |
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| QXJ | Independence Blue Cross | PA | Exchange/Marketplace | | Payer ID provider number reference, Professional (Independence Blue Cross), Revised April 2025 |
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| QXK | CareFirst BlueCross BlueShield | Multi-state | | | Provider Quick Reference Guide (CareFirst BlueCross BlueShield, CUT6010-1E) |
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| QXL | CareFirst BlueCross BlueShield | Multi-state | | | Provider Quick Reference Guide (CareFirst BlueCross BlueShield, CUT6010-1E) |
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| QXM | CareFirst BlueCross BlueShield | Multi-state | | | Provider Quick Reference Guide (CareFirst BlueCross BlueShield, CUT6010-1E) |
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| QXR | CareFirst BlueCross BlueShield | Multi-state | | | Provider Quick Reference Guide (CareFirst BlueCross BlueShield, CUT6010-1E) |
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| QXS | CareFirst BlueCross BlueShield | Multi-state | | | Provider Quick Reference Guide (CareFirst BlueCross BlueShield, CUT6010-1E) |
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| QXT | CareFirst BlueCross BlueShield | Multi-state | | | Provider Quick Reference Guide (CareFirst BlueCross BlueShield, CUT6010-1E) |
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| QXU | CareFirst BlueCross BlueShield | Multi-state | | | Provider Quick Reference Guide (CareFirst BlueCross BlueShield, CUT6010-1E) |
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| QZY | Premera Blue Cross HMO | WA | HMO | | Premera Blue Cross Three Character Prefixes (Premera Blue Cross, form 020469) |
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