BCBS Alpha Prefix YAA to YZZ

The BCBS alpha prefixes from YAA to YZZ are three-character codes assigned to Blue Cross Blue Shield insurance plans. Each prefix in the YAA to YZZ range identifies the BCBS home plan, the state of origin, and the plan type (such as PPO, HMO, EPO, or POS). The YAA to YZZ prefixes appear as the first three characters on a member's insurance ID card and are used by medical billers and healthcare providers to route claims, verify eligibility, and identify the correct BCBS entity for reimbursement. Prominent BCBS companies in this range include Anthem BCBS in Connecticut, Kentucky, Ohio, and Virginia, Blue Shield of California, and Regence BCBS in Oregon, Idaho, Utah, and Washington.

The YAA to YZZ prefix range is part of the larger BCBS alpha prefix system, which spans from AAA through ZZZ. The Blue Cross Blue Shield Association assigns prefixes to its independent licensees across the United States. Each prefix maps to a specific BCBS company and state, such as YAA for Anthem BCBS of Connecticut or YZA for Anthem BCBS of Kentucky. The prefix system standardizes the identification of BCBS plans for claims processing and provider services.

Not all prefixes in the YAA to YZZ range are assigned to active BCBS plans. Some prefixes remain unallocated and are reserved for future use or are not currently in circulation. Medical billers should verify unallocated prefixes against the latest BCBS directories or contact the BCBS Association to confirm prefix assignments before submitting claims.

Each BCBS prefix in the YAA to YZZ range is associated with a claims phone number that connects providers and medical billers to the appropriate BCBS plan's claims department. The claims phone number is used to verify member eligibility, confirm plan details, obtain prior authorizations, and resolve claims issues. The phone numbers listed in the prefix tables are specific to the BCBS home plan identified by the prefix.

For example, the YAA prefix for Anthem BCBS of Connecticut lists (800) 424-8730, while the YZA prefix for Anthem BCBS of Kentucky lists (800) 331-1475. Billers should use the claims phone number associated with the specific prefix rather than a general BCBS number, as each independent BCBS licensee maintains its own claims processing operations and provider support lines.

Some prefixes in the YAA to YZZ range may not have a listed phone number. For these prefixes, billers should use the BCBS Plan Finder or contact the BCBS Association to obtain the correct claims filing contact. Keeping an updated record of claims phone numbers for frequently encountered prefixes improves billing efficiency and reduces the time spent on claim follow-up.

The YAA to YZZ BCBS prefix range covers BCBS plans from multiple states across the United States. The following states are represented in the YAA to YZZ prefix range:

• location_on California — Blue Shield of California (YGY), Blue Cross of California (YED, YLT, YZC, YZU)
• location_on Connecticut — Anthem BCBS (YAA-YAF, YLA, YZK)
• location_on Georgia — Anthem BCBS of Georgia (YGZ), BCBS of Georgia (YLZ, YSE)
• location_on Kentucky — Anthem BCBS of Kentucky (YEA, YLE, YZA, YZE-YZG, YZJ, YZZ)
• location_on Massachusetts — BCBS of Massachusetts (YLV, YSB)
• location_on Nebraska — BCBS of Nebraska (YZL)
• location_on New Jersey — Horizon BCBS of New Jersey (YHA, YHB, YLH)
• location_on New York — Empire BCBS (YLG), BCBS of Western New York (YZW, YZX)
• location_on North Carolina — BCBS of North Carolina (YMC)
• location_on Ohio — Anthem BCBS of Ohio (YFS, YLF, YRA, YRB, YSY, YZI, YZO, YZY)
• location_on Pennsylvania — Highmark BCBS (YLW, YYZ), Blue Cross of NE Pennsylvania (YZH, YZM)
• location_on Rhode Island — BCBS of Rhode Island (YCA-YCC, YME)
• location_on Virginia — Anthem BCBS of Virginia (YDA-YDD, YLB, YMG, YMH, YRC, YRZ, YTA, YTB, YTZ)

The distribution of prefixes across states and companies reflects the decentralized structure of the BCBS system. No single BCBS entity controls the entire prefix range. Instead, each licensee is assigned specific prefixes to identify its members and plans. Medical billers should use the prefix on the member's ID card as the primary identifier for determining which BCBS company and state to contact for claims processing and eligibility verification.