BCBS Alpha Prefix IAA to IZZ

The BCBS alpha prefix range from IAA to IZZ represents a segment of the Blue Cross Blue Shield (BCBS) insurance identification system. The IAA to IZZ prefixes are the first three characters on member ID cards and identify the BCBS home plan associated with a member. The IAA to IZZ range covers multiple states and BCBS companies, including prefixes like IBX for Independence Blue Cross and IHA for Blue Shield of California. Medical billers and providers use the IAA to IZZ prefixes to route claims, verify insurance eligibility, and process reimbursements.

The IAA to IZZ prefix range maps each prefix to a BCBS company and state, enabling precise claims filing. IBX corresponds to Independence Blue Cross, while IHA is linked to Blue Shield of California. The IAA to IZZ prefix mapping determines the correct claims submission address or phone number, preventing delays in processing. The IAA to IZZ range is part of the complete BCBS prefix directory, which spans from AAA through ZZZ and covers all assigned prefixes.

Not all prefixes in the IAA to IZZ 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.

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BCBS Prefix IAA to IEZ Assignment Table

The BCBS Prefix IAA to IEZ Assignment Table lists the Blue Cross Blue Shield prefixes from IAA to IEZ. The IAA to IEZ table identifies the BCBS home plans, states, and plan types associated with each prefix. The IAA to IEZ table includes claims phone numbers for accurate claims filing and verification.

Prefix	BCBS Home Plan Name	State	Plan Type	Claims Phone Number
IAA	Anthem BCBS of Wisconsin	Wisconsin	HMO, HDHP, EPO	(800) 331-1475
IAB	Wellmark BCBS	South Dakota/Iowa	PPO, Medicaid, Traditional Indemnity	(800) 524-9242
IAC	Regence BCBS	Oregon/Idaho/Utah/Washington	HMO, EPO	(888) 248-2595
IAD	Anthem BCBS	Indiana	PPO, Medicaid, HDHP	(800) 533-2583
IAE	BCBS of Michigan	Michigan	PPO, POS	(800) 482-3276
IAF	BCBS of Western New York	New York	HDHP, Medicaid, EPO	(800) 854-1790
IAG	Anthem BCBS of Virginia	Virginia	PPO, EPO	(800) 331-1475
IBX	Independence Blue Cross	Pennsylvania	PPO, HMO, POS	(800) 275-2583

The prefixes listed in the IAA to IEZ table are verified for routing claims within the BCBS network. For prefixes not detailed in the IAA to IEZ table, consult the BCBS Plan Finder for current information.

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BCBS Prefix IBX Independence Blue Cross

The BCBS prefix IBX is assigned to Independence Blue Cross of Pennsylvania. The IBX prefix serves as a primary identifier for members enrolled in Independence Blue Cross plans. Independence Blue Cross plans under the IBX prefix include Preferred Provider Organization (PPO), Health Maintenance Organization (HMO), and Point of Service (POS). The IBX prefix appears on member insurance cards, directing healthcare providers to route claims to the Pennsylvania-based BCBS entity.

When processing claims for members with the IBX prefix, medical billers must verify the plan type indicated on the insurance card. Plan type verification directs claims to the Independence Blue Cross processing center, reducing the risk of claim rejections and expediting reimbursement timelines. Independence Blue Cross may offer Medicare Advantage and Medicaid managed care services under related prefixes, providing coverage options for residents of the Philadelphia region and southeastern Pennsylvania.

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BCBS Prefix IFA to IKZ Assignment Table

The BCBS Prefix IFA to IKZ Assignment Table lists the Blue Cross Blue Shield alpha prefixes between IFA and IKZ. The IFA to IKZ table includes each prefix, the corresponding BCBS home plan, associated states, plan types, and claims contact numbers.

Prefix	BCBS Home Plan Name	State	Plan Type	Claims Phone Number
IHA	Blue Shield of California	California	Medicaid, Traditional Indemnity, PPO	(800) 676-2583

The IFA to IKZ table includes assigned prefixes with their plan details and contact numbers for accurate claims routing.

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BCBS Prefix ILA to IPZ Assignment Table

The BCBS Alpha Prefix ILA to IPZ Assignment Table provides information for medical billing and claims processing. The ILA to IPZ table includes details about each prefix, the corresponding Blue Cross Blue Shield home plan, associated states, plan types, and claims contact numbers.

Prefix	BCBS Home Plan Name	State	Plan Type	Claims Phone Number
IPB	BCBS of Illinois	Illinois	PPO, EPO	(800) 233-1474

The ILA to IPZ table is part of the BCBS prefix directory for proper claim submission and processing.

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BCBS Prefix IRA to IZZ Assignment Table

The BCBS prefix range from IRA to IZZ covers Blue Cross Blue Shield plans across multiple states. The IRA to IZZ table provides detailed information about each prefix, including the associated home plan, state, plan type, and claims phone number.

Prefix	BCBS Home Plan Name	State	Plan Type	Claims Phone Number
IRA	Horizon BCBS	New Jersey	PPO, HMO, EPO, POS	(800) 682-9090
IRX	BCBS of Massachusetts	Massachusetts	HMO, PPO	(800) 262-0820
IRY	Independence Blue Cross	Pennsylvania	PPO, POS	(800) 275-2583
IRZ	Anthem Blue Cross	California	PPO, EPO	(800) 288-9294
ISA	Anthem BCBS of Ohio	Ohio	HMO, PPO	(800) 331-1475
ISB	Premera Blue Cross	Alaska	HMO, PPO	(800) 508-4722
ISZ	Blue Cross of Idaho	Idaho	PPO, HDHP, POS	(800) 627-1183
ITA	CareFirst BCBS	Maryland/DC/N. Virginia	Medicaid, Traditional Indemnity, Medicare Advantage	(800) 692-7459
ITB	Wellmark BCBS	South Dakota/Iowa	HDHP, PPO, HMO	(800) 524-9242
ITC	BCBS of Massachusetts	Massachusetts	EPO, Medicare Advantage, POS	(800) 262-0820
ITX	Regence BCBS	Oregon/Idaho/Utah/Washington	HMO, POS	(888) 248-2595
ITY	Independence Blue Cross	Pennsylvania	PPO, POS	(800) 275-2583
ITZ	Anthem BCBS of Georgia	Georgia	Medicaid, POS, Traditional Indemnity	(800) 772-1139

The IRA to IZZ table identifies and categorizes the insurance plans under the Blue Cross Blue Shield umbrella with plan details for accurate claims processing.

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What Are the BCBS Alpha Prefixes from IAA to IZZ?

The BCBS alpha prefixes from IAA to IZZ are three-character codes assigned to Blue Cross Blue Shield insurance plans. Each prefix in the IAA to IZZ range identifies the BCBS home plan, the state of origin, and the plan type (such as PPO, HMO, EPO, or POS). The IAA to IZZ 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.

The IAA to IZZ 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 IBX for Independence Blue Cross or IHA for Blue Shield of California. The prefix system standardizes the identification of BCBS plans for claims processing and provider services.

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Which BCBS Companies Use Prefixes in the IAA to IZZ Range?

Multiple Blue Cross Blue Shield companies use prefixes in the IAA to IZZ range. The following BCBS companies are among those with assigned prefixes in this range:

health_and_safety Independence Blue Cross — Prefixes include IBX, IRY, and ITY, covering PPO, HMO, and POS plans in Pennsylvania.
health_and_safety Anthem Blue Cross Blue Shield — Anthem operates across multiple states with prefixes such as IAA (Wisconsin), IAD (Indiana), IAG (Virginia), IRZ (California), ISA (Ohio), and ITZ (Georgia).
health_and_safety Blue Shield of California — Prefixes include IHA, covering Medicaid, Traditional Indemnity, and PPO plans in California.
health_and_safety BCBS of Massachusetts — Prefixes include IRX and ITC, covering HMO, PPO, EPO, Medicare Advantage, and POS plans in Massachusetts.
health_and_safety CareFirst BlueCross BlueShield — Prefixes include ITA, covering Medicaid, Traditional Indemnity, and Medicare Advantage plans in the Maryland, Washington D.C., and Northern Virginia region.

These companies represent a portion of the independent BCBS licensees with prefixes in the IAA to IZZ range. Each company operates within specific states and offers a variety of plan types. Medical billers should consult the full BCBS prefix directory for a complete list of assignments within this range.

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How to Read the BCBS IAA to IZZ Prefix Table?

Reading the BCBS IAA to IZZ prefix table follows a systematic approach for accurate claims processing. The IAA to IZZ prefix table identifies the correct Blue Cross Blue Shield plan based on the prefix found on a patient's insurance card.

1 Locate the Prefix

Identify the three-character prefix on the patient's insurance card. The BCBS prefix directory is the first set of letters in the member ID.

2 Match the Prefix

Scan the 'Prefix' column in the IAA to IZZ table to find the exact three-letter code. The table is organized alphabetically for navigation.

3 Identify Plan Details

After locating the prefix, read across the row to gather details about the BCBS Home Plan Name, the State of origin, and the Plan Type (such as PPO, HMO, EPO, or POS). The plan details determine the coverage rules and network.

4 Verify Claims Information

Note the Claims Phone Number provided in the table. The claims phone number verifies details and confirms that claims are submitted to the correct payer following the appropriate billing protocols.

How to Look Up a Specific BCBS Prefix in the IAA to IZZ Range?

Looking up a BCBS prefix in the IAA to IZZ range supports accurate claims processing. The following steps guide proper identification and submission.

1 Locate the Prefix on the Insurance Card

The BCBS prefix identifier is a three-character code found on the front of the patient's BCBS insurance card. The prefix code identifies the home plan and state.

2 Match the Prefix to the Reference Table

Use a BCBS prefix lookup directory to find the exact prefix. The directory provides details such as the BCBS home plan name, state, and plan type (e.g., PPO, HMO).

3 Identify the Home Plan and State

After matching the prefix, note the BCBS company and the state the plan serves. The home plan and state information directs claims routing.

4 Verify with the BCBS Contact Number

Before submitting claims, contact the claims phone number listed in the prefix table. Contacting the claims department confirms the patient's eligibility and coverage details.

5 Submit the Claim to the Correct Address

Use the verified information to route the claim to the appropriate BCBS company's processing address or electronic payer ID. All claim forms should reference the correct prefix and member ID to avoid denials.

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How to Verify the BCBS Home Plan Using the Three-Character Prefix?

Verifying the BCBS home plan using the three-character prefix requires locating the prefix on the member's insurance ID card and matching it against the BCBS prefix directory. The prefix is the first three alphabetic characters on the card and maps directly to a BCBS company and state. To verify, billers should access the BCBS prefix lookup table, find the matching three-character code, and confirm the home plan name, state, and plan type. The claims phone number listed for that prefix can be used to contact the BCBS plan directly for additional verification, such as confirming member eligibility, benefits, and claims submission requirements. Accurate prefix verification prevents claims from being submitted to the wrong BCBS entity and reduces processing delays.

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What to Do When the IAA to IZZ Prefix Is Not in the Table?

When a BCBS prefix in the IAA to IZZ range is not listed in the assignment table, the prefix may be unallocated, recently reassigned, or not yet added to the reference directory. Medical billers should first verify the prefix by checking the BCBS Plan Finder tool on the Blue Cross Blue Shield Association website. The Plan Finder provides the most current prefix assignments and associated plan details. If the prefix is still not found, billers should contact the BCBS Association's provider support line or the local BCBS plan for assistance.

Submitting claims with an unverified or missing prefix can result in claim rejections, payment delays, or misdirected claims. Billers should document the verification steps taken and note any discrepancies between the prefix on the member's card and the available directories. If the prefix is confirmed as unallocated, the biller should request updated insurance information from the patient and verify the correct BCBS home plan before resubmitting the claim.

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BCBS IAA to IZZ Prefix Phone Numbers and Claims Filing Contacts

Each BCBS prefix in the IAA to IZZ 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 IBX prefix for Independence Blue Cross lists (800) 275-2583, while the IHA prefix for Blue Shield of California lists (800) 676-2583. 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 IAA to IZZ 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.

Key BCBS Companies in the IAA to IZZ Range:

chevron_right Independence Blue Cross — IBX, IRY, ITY prefixes — (800) 275-2583
chevron_right Anthem BCBS — IAA, IAD, IAG, IRZ, ISA, ITZ prefixes — (800) 331-1475
chevron_right BCBS of Massachusetts — IRX, ITC prefixes — (800) 262-0820
chevron_right Wellmark BCBS — IAB, ITB prefixes — (800) 524-9242
chevron_right CareFirst BCBS — ITA prefix — (800) 692-7459

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Claims Filing Addresses for IAA to IZZ BCBS Prefixes

Claims filing addresses for the IAA to IZZ BCBS prefixes vary by the BCBS home plan associated with each prefix. Each independent BCBS licensee maintains its own claims processing address for paper claims and an electronic payer ID for electronic claims submissions. Medical billers must match the prefix on the member's insurance card to the correct BCBS home plan and use the corresponding claims filing address to submit claims. Using the wrong filing address results in claim rejections or significant processing delays.

chevron_right Electronic claims submission is the preferred method for most BCBS plans, using the payer ID associated with the home plan. Billers should verify the payer ID through the BCBS prefix directory or by contacting the claims phone number listed for the prefix.
chevron_right Paper claims require the mailing address specific to the BCBS company, which may differ based on the claim type (professional vs. institutional). Providers should consult the BCBS home plan's provider manual or website for the most current claims filing addresses.
chevron_right Submission requirements vary by plan. Always confirm the correct filing method and address with the BCBS home plan before submitting claims to avoid rejections or delays.

BCBS Plan Types Identified by IAA to IZZ Prefixes

The IAA to IZZ BCBS prefix range includes multiple plan types offered by Blue Cross Blue Shield companies. Each prefix identifies not only the home plan and state but also the type of insurance plan, which determines the network rules, coverage guidelines, and claims processing requirements.

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HMO and PPO Plans

HMO plans in the IAA to IZZ prefix range require members to use in-network providers and obtain referrals from a primary care physician for specialist care. PPO plans allow members to visit both in-network and out-of-network providers, with lower out-of-pocket costs for in-network care. PPO plans do not require referrals for specialist visits. Medical billers processing claims for HMO or PPO plans should verify whether the provider is in-network and confirm referral requirements before submitting claims.

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EPO and POS Plans

EPO plans identified by IAA to IZZ prefixes require members to use in-network providers but do not require referrals for specialist visits. Out-of-network services are not covered except in emergencies. POS plans combine features of HMO and PPO plans, allowing members to choose a primary care physician and receive referrals to see specialists either in-network or out-of-network at different coverage levels. Billers should verify network status and referral requirements when processing EPO and POS plan claims.

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Medicaid and Medicare Advantage Plans

Several prefixes in the IAA to IZZ range are associated with Medicaid managed care and Medicare Advantage plans offered through BCBS companies. Medicaid plans provide coverage for eligible low-income individuals, while Medicare Advantage plans serve eligible seniors and individuals with disabilities. Prefixes such as ITA (CareFirst BCBS) and ITZ (Anthem BCBS of Georgia) include Medicaid and Medicare Advantage plan types. Billers must verify the specific plan type and follow Medicaid or Medicare billing guidelines when processing claims for these prefixes.

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HDHP and Traditional Indemnity Plans

High Deductible Health Plans (HDHP) in the IAA to IZZ range feature higher deductibles and lower premiums, often paired with Health Savings Accounts (HSAs). Traditional Indemnity plans allow members to visit any provider without network restrictions and reimburse a set percentage of charges. Prefixes such as IAA (Anthem BCBS of Wisconsin) and IAB (Wellmark BCBS) include HDHP and Traditional Indemnity plan types. Billers should confirm deductible status and reimbursement rates when processing claims for HDHP and Traditional Indemnity plans.

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How the Third Character in the Prefix Identifies the Plan Type?

The third character in a BCBS alpha prefix can provide additional information about the plan type or the specific product line within a BCBS company. While the BCBS prefix system primarily identifies the home plan and state, the third character may indicate whether the plan is a PPO, HMO, EPO, or a specialized product such as Medicare Advantage or a Federal Employee Program (FEP) plan. However, the third character's meaning is not standardized across all BCBS licensees, and its interpretation varies by company. Medical billers should not rely solely on the third character to determine the plan type. Instead, billers should verify the plan type by consulting the prefix directory, checking the member's insurance card, and confirming with the BCBS home plan's claims department.

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States and BCBS Companies Covered in the IAA to IZZ Prefix Range

The IAA to IZZ BCBS prefix range covers BCBS plans from multiple states across the United States. States represented in this range include Alaska, California, Georgia, Idaho, Illinois, Indiana, Iowa, Maryland, Massachusetts, Michigan, New Jersey, New York, Ohio, Oregon, Pennsylvania, South Dakota, Utah, Virginia, Washington, Washington D.C., and Wisconsin. Each state has one or more independent BCBS licensees that operate within its borders.

BCBS companies covered in the IAA to IZZ range include Independence Blue Cross (Pennsylvania), Anthem Blue Cross Blue Shield (operating in multiple states including Wisconsin, Indiana, Virginia, California, Ohio, and Georgia), Blue Shield of California, BCBS of Michigan, BCBS of Western New York, Wellmark BCBS, Regence BCBS, Horizon BCBS, BCBS of Massachusetts, Premera Blue Cross, Blue Cross of Idaho, CareFirst BCBS, and BCBS of Illinois. Each company holds an independent license from the Blue Cross Blue Shield Association to operate in its designated service area.

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.

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Independence Blue Cross Philadelphia Prefixes in the I Range

Independence Blue Cross holds multiple prefixes within the IAA to IZZ range, including IBX, IRY, and ITY. Each prefix identifies a specific product line or plan category within Independence Blue Cross. The IBX prefix is the most widely recognized identifier for Independence Blue Cross, covering PPO, HMO, and POS plans. Additional prefixes such as IRY and ITY provide further granularity for plan identification and claims routing, primarily covering PPO and POS plans.

Medical billers working with Pennsylvania-based Independence Blue Cross prefixes should use the specific claims phone number associated with each prefix. While the numbers may route to the same Independence Blue Cross claims department, using the correct prefix-specific number ensures that the call is directed to the appropriate team. Independence Blue Cross's claims department can be reached at (800) 275-2583 for most Independence Blue Cross prefixes in the I range. Verifying the prefix before calling reduces hold times and improves claim resolution efficiency.

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Blue Cross Blue Shield of Illinois Prefixes in the I Range

Blue Cross Blue Shield of Illinois holds the IPB prefix within the IAA to IZZ range. The IPB prefix identifies PPO and EPO plans offered by BCBS of Illinois. BCBS of Illinois is one of the largest BCBS licensees in the country, serving millions of members across the state of Illinois.

Medical billers processing claims for BCBS of Illinois members with the IPB prefix should contact (800) 233-1474 for claims inquiries and eligibility verification. BCBS of Illinois processes claims through its Illinois-based operations center, and billers should ensure that claims reference the correct IPB prefix and member ID for accurate routing and timely reimbursement.

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How to Use IAA to IZZ Prefixes for Insurance Eligibility Verification?

Using BCBS alpha prefixes in the IAA to IZZ range for insurance eligibility verification follows a structured process. The IAA to IZZ prefix verification confirms patient coverage before healthcare services are rendered.

1 Obtain the Patient's Insurance Card

Request the patient's BCBS insurance card at check-in. The card displays the member ID, which begins with the three-character alpha prefix. Copy the prefix and full member ID accurately for verification purposes.

2 Identify the BCBS Home Plan Using the Prefix

Use the IAA to IZZ prefix lookup table to match the prefix to the corresponding BCBS home plan and state. The home plan identification determines which BCBS entity to contact for eligibility verification.

3 Contact the Claims Phone Number

Call the claims phone number listed in the prefix table for the identified home plan. Provide the member ID and prefix to the representative to verify the patient's eligibility, coverage status, and benefits.

4 Confirm Plan Type and Network Status

During the verification call, confirm the plan type (PPO, HMO, EPO, POS, Medicare Advantage, or Medicaid) and whether the provider is in-network for the patient's plan. Network status affects coverage levels and reimbursement rates.

5 Document the Verification Results

Record the verification reference number, the representative's name, and the confirmed coverage details. Documentation supports claim submission and provides evidence of eligibility verification in case of disputes or audits.

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How to Route Claims Using the IAA to IZZ BCBS Prefix?

Routing claims using the IAA to IZZ BCBS prefix follows a systematic approach for accurate processing.

1 Read the Prefix from the Member ID Card

Identify the three-character alpha prefix at the beginning of the member's ID number on their BCBS insurance card. The prefix is the key routing identifier for all BCBS claims.

2 Look Up the Prefix in the IAA to IZZ Table

Find the prefix in the assignment table to identify the BCBS home plan, state, plan type, and claims phone number. This information determines where the claim should be routed.

3 Determine the Correct Payer ID or Filing Address

Based on the home plan identified, obtain the correct electronic payer ID for electronic claims or the mailing address for paper claims. The payer ID and filing address are specific to the BCBS home plan associated with the prefix.

4 Submit the Claim with the Correct Prefix and Member ID

Submit the claim using the full member ID (including the three-character prefix) to the identified payer. Ensure the claim form references the correct prefix, as an incorrect or missing prefix will result in claim rejection or misdirection to the wrong BCBS plan.

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Common Questions

What Are BCBS Prefixes?

BCBS prefixes are three-character alphabetic codes that appear at the beginning of a Blue Cross Blue Shield member's insurance ID number. Each prefix identifies the BCBS home plan (the specific BCBS company that issued the insurance), the state where the plan is based, and the general plan type. The prefix system enables medical billers and healthcare providers to quickly identify which BCBS entity is responsible for processing claims and verifying member eligibility. The BCBS Association assigns prefixes to its independent licensees, and the complete prefix directory spans from AAA through ZZZ.

How Do You Identify a Blue Prefix?

The Blue prefix on an insurance card is the first three alphabetic characters of the member ID number, located on the front of the BCBS insurance card. The prefix is always composed of three letters (no numbers) and is followed by additional alphanumeric characters that form the complete member ID. To identify the prefix, look at the member ID field and isolate the first three letters. These three letters are the BCBS alpha prefix that maps to a specific home plan, state, and claims routing destination.

Does IAA to IZZ Include Alphanumeric?

The IAA to IZZ prefix range consists exclusively of three-letter alphabetic codes. BCBS alpha prefixes are composed of letters only and do not include numbers. However, the broader BCBS identification system may include alphanumeric characters in the full member ID that follows the three-letter prefix. The prefix itself, within the IAA to IZZ range, is strictly alphabetic. If a member's ID card appears to have numbers in the first three characters, it may indicate a non-standard card format or a different insurance system.

Are There Rules for Assigning?

The Blue Cross Blue Shield Association assigns alpha prefixes to its independent licensees according to internal assignment rules. The first character of the prefix often corresponds to a geographic region or a specific BCBS company, but this pattern is not universally consistent. Some BCBS companies hold multiple prefixes to distinguish between different plan types, product lines, or geographic sub-regions. Prefixes may be reassigned or retired as BCBS companies merge, restructure, or expand their product offerings. The assignment rules are managed by the BCBS Association, and the complete prefix directory is the authoritative source for current assignments.

Can a Prefix Belong to Multiple States?

A BCBS prefix in the IAA to IZZ range can be associated with a BCBS company that operates across multiple states. For example, the IAC prefix is assigned to Regence BCBS, which operates in Oregon, Idaho, Utah, and Washington. In such cases, the prefix identifies the parent BCBS company rather than a single state. However, each prefix is assigned to one BCBS licensee, even if that licensee serves multiple states. Medical billers should verify the specific state and plan details by consulting the prefix directory or contacting the BCBS company associated with the prefix to determine the correct claims routing and eligibility information.

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Disclaimer

The information provided on this page is for educational and reference purposes only. This content is not affiliated with, endorsed by, or officially connected to the Blue Cross Blue Shield Association or any of its independent licensees. BCBS prefix assignments, plan details, claims phone numbers, and filing addresses are subject to change without notice. Medical billers and healthcare providers should verify all BCBS prefix list information against the official BCBS Plan Finder and contact the appropriate BCBS plan directly before submitting claims. This resource should not be used as the sole basis for claims submission or eligibility verification. Always cross-reference with current, authoritative sources.