BCBS Alpha Prefix OAA to OZZ

The BCBS alpha prefix range from OAA to OZZ represents a segment of the Blue Cross Blue Shield (BCBS) insurance identification system. The OAA to OZZ prefixes are the first three characters on member ID cards and identify the BCBS home plan associated with a member. The OAA to OZZ range covers multiple states and BCBS companies, including prefixes assigned to BCBS of Massachusetts, Anthem BCBS of Ohio, BCBS of Michigan, Blue Shield of California, and CareFirst BCBS. Medical billers and providers use the OAA to OZZ prefixes to route claims, verify insurance eligibility, and process reimbursements.

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BCBS Prefix OAA to OEZ Assignment Table

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

Prefix	BCBS Home Plan Name	State	Plan Type	Claims Phone Number
OAA	BCBS of Massachusetts	Massachusetts	PPO, HMO	(800) 262-0820
OAB	BCBS of Massachusetts	Massachusetts	PPO, HMO	(800) 262-0820
OAC	BCBS of Massachusetts	Massachusetts	PPO, HMO	(800) 262-0820
OAD	BCBS of Massachusetts	Massachusetts	PPO, HMO	(800) 262-0820
OAE	Anthem BCBS of Ohio	Ohio	PPO, HMO, EPO	(800) 331-1475
OAF	BCBS of Western New York	New York	PPO, HMO	(800) 854-1790
OAG	BCBS of Nebraska	Nebraska	PPO	(800) 432-3990
OAH	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OAI	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OAJ	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OAK	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OAL	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OAM	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OAN	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OAO	CareFirst BCBS	Maryland/DC/VA	PPO, HMO, POS	(800) 692-7459
OAP	Blue Shield of California	California	PPO, HMO, EPO	(800) 676-2583
OAQ	Blue Cross of California/Anthem Blue Cross CA	California	PPO, EPO	(800) 288-9294
OAR	Highmark BCBS PA	Pennsylvania	PPO, HMO	(800) 541-1524
OAS	Wellmark BCBS	Iowa/South Dakota	PPO, HMO	(800) 524-9242
OAT	BCBS of Oklahoma	Oklahoma	PPO, HMO	(800) 942-5837
OAU	BCBS of Louisiana	Louisiana	PPO, HMO	(800) 599-2583
OAV	CareFirst BCBS	Maryland/DC/VA	PPO, HMO, POS	(800) 692-7459
OAW	CareFirst BCBS	Maryland/DC/VA	PPO, HMO, POS	(800) 692-7459
OAX	BCBS of Kansas City	Kansas City	PPO, HMO	(816) 395-2222
OAY	Anthem BCBS of Colorado	Colorado	PPO, HMO	(800) 424-5725
OAZ	Anthem BCBS of Missouri	Missouri	PPO, HMO	(800) 331-1475
OBA	Blue Cross of Idaho	Idaho	PPO, HMO	(800) 627-1183
OBB	Horizon BCBS NJ	New Jersey	PPO, HMO, POS	(800) 682-9090
OBC	BCBS of Alabama	Alabama	PPO, HMO, POS	(800) 292-6662
OBD	Anthem BCBS of Virginia	Virginia	PPO, HMO, EPO, POS	(800) 331-1475
OBE	Florida Blue	Florida	PPO, HMO	(800) 352-2583
OBF	BCBS of North Dakota	North Dakota	PPO, HMO	(800) 342-4718
OBG	Anthem BCBS of Connecticut	Connecticut	PPO, HMO	(800) 424-8730
OBH	BCBS of Tennessee	Tennessee	PPO, HMO	(800) 467-2954
OBI	Premera BCBS Alaska	Alaska	PPO, HMO	(800) 508-4722
OBJ	BCBS of Arizona	Arizona	PPO, HMO	(800) 352-2583
OBK	Arkansas BCBS	Arkansas	PPO, HMO	(800) 643-5690
OBL	BCBS of South Carolina	South Carolina	PPO, HMO	(800) 288-2227
OBM	Independence Blue Cross	Pennsylvania	PPO, HMO	(800) 275-2583
OBN	BCBS of Rhode Island	Rhode Island	PPO, HMO	(800) 639-2227
OBO	BCBS of Vermont	Vermont	PPO, HMO	(800) 255-4550
OBP	BCBS of Minnesota	Minnesota	PPO, HMO	(800) 292-9371
OBQ	Anthem BCBS of Georgia	Georgia	PPO, HMO	(800) 772-1139
OBR	Anthem BCBS of Indiana	Indiana	PPO, HMO	(800) 533-2583

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

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BCBS Prefix OFA to OKZ Assignment Table

The BCBS Prefix OFA to OKZ Assignment Table lists the Blue Cross Blue Shield alpha prefixes between OFA and OKZ. The OFA to OKZ 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
OFA	BCBS of Massachusetts	Massachusetts	PPO, HMO	(800) 262-0820
OFB	Anthem BCBS of Ohio	Ohio	PPO, HMO	(800) 331-1475
OFC	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OFD	Blue Shield of California	California	PPO, HMO, EPO	(800) 676-2583
OFE	CareFirst BCBS	Maryland/DC/VA	PPO, HMO	(800) 692-7459
OFF	Highmark BCBS PA	Pennsylvania	PPO, HMO	(800) 541-1524
OFG	BCBS of Western New York	New York	PPO, HMO	(800) 854-1790
OFH	Wellmark BCBS	Iowa/South Dakota	PPO, HMO	(800) 524-9242
OFI	BCBS of Alabama	Alabama	PPO, HMO	(800) 292-6662
OFJ	Florida Blue	Florida	PPO, HMO	(800) 352-2583
OFK	Anthem BCBS of Indiana	Indiana	PPO, HMO	(800) 533-2583
OFL	BCBS of Tennessee	Tennessee	PPO, HMO	(800) 467-2954
OFM	Anthem BCBS of Georgia	Georgia	PPO, HMO	(800) 772-1139
OFN	BCBS of Minnesota	Minnesota	PPO, HMO	(800) 292-9371
OFO	BCBS of South Carolina	South Carolina	PPO, HMO	(800) 288-2227
OFP	BCBS of Nebraska	Nebraska	PPO	(800) 432-3990

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

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BCBS Prefix OLA to OPZ Assignment Table

The BCBS Alpha Prefix OLA to OPZ Assignment Table provides information for medical billing and claims processing. The OLA to OPZ 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
OLA	BCBS of Massachusetts	Massachusetts	PPO, HMO	(800) 262-0820
OLB	Anthem BCBS of Ohio	Ohio	PPO, HMO	(800) 331-1475
OLC	Blue Shield of California	California	PPO, EPO	(800) 676-2583
OLD	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OLE	Anthem Blue Cross	California	PPO, EPO	(800) 288-9294
OLF	Anthem Blue Cross	California	PPO, EPO	(800) 288-9294
OLG	Premera BCBS of Alaska	Alaska	PPO, HMO	(800) 508-4722
OLH	BCBS of Arizona	Arizona	PPO, HMO	(800) 352-2583
OLI	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OLJ	BCBS of Tennessee	Tennessee	PPO, HMO	(800) 467-2954
OLK	BCBS of Tennessee	Tennessee	PPO, HMO	(800) 467-2954
OLL	CareFirst BCBS	Maryland/DC/VA	PPO, HMO	(800) 692-7459
OLM	Arkansas BCBS	Arkansas	PPO, HMO	(800) 643-5690
OLN	BCBS of Alabama	Alabama	PPO, HMO	(800) 292-6662
OLO	Blue Shield of California	California	PPO, EPO	(800) 676-2583
OLP	BCBS of Western New York	New York	PPO, HMO	(800) 854-1790
OLQ	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OLR	BCBS of South Carolina	South Carolina	PPO, HMO	(800) 288-2227
OLS	CareFirst BCBS	Maryland/DC/VA	PPO, HMO	(800) 692-7459
OLT	Wellmark BCBS	Iowa/South Dakota	PPO, HMO	(800) 524-9242
OLU	Anthem BCBS of Colorado	Colorado	PPO, HMO	(800) 424-5725
OLV	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OLW	BCBS of Western New York	New York	PPO, HMO	(800) 854-1790
OLX	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OLY	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OLZ	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OMA	Anthem BCBS of Ohio	Ohio	PPO, HMO	(800) 331-1475
OMB	Anthem BCBS of Ohio	Ohio	PPO, HMO	(800) 331-1475
OMC	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OMD	Independence Blue Cross	Pennsylvania	PPO, HMO	(800) 275-2583
OME	Wellmark BCBS	Iowa/South Dakota	PPO, HMO	(800) 524-9242
OMF	Anthem Blue Cross	California	PPO, HMO	(800) 288-9294
OMG	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OMH	Blue Shield of California	California	PPO, HMO	(800) 676-2583
OMI	Anthem BCBS of Georgia	Georgia	PPO, HMO	(800) 772-1139
OMJ	Independence Blue Cross	Pennsylvania	PPO, HMO	(800) 275-2583
OMK	Anthem BCBS of Missouri	Missouri	PPO, HMO	(800) 331-1475
OML	Florida Blue	Florida	PPO, HMO	(800) 352-2583
OMM	Anthem Blue Cross	California	PPO, HMO	(800) 288-9294
OMN	Anthem Blue Cross	California	PPO, HMO	(800) 288-9294
OMO	Anthem Blue Cross	California	PPO, HMO	(800) 288-9294
OMP	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OMQ	BCBS of Massachusetts	Massachusetts	PPO, HMO	(800) 262-0820
OMR	BCBS of Rhode Island	Rhode Island	PPO, HMO	(800) 639-2227
OMS	BCBS of Massachusetts	Massachusetts	PPO, HMO	(800) 262-0820
OMT	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OMU	Blue Cross of Idaho	Idaho	PPO, HMO	(800) 627-1183
OMV	CareFirst BCBS	Maryland/DC/VA	PPO, HMO	(800) 692-7459
OMW	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OMX	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OMY	BCBS of Vermont	Vermont	PPO, HMO	(800) 255-4550
OMZ	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
ONA	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
ONB	Anthem BCBS of Ohio	Ohio	PPO, HMO	(800) 331-1475
ONC	Anthem BCBS of Indiana	Indiana	PPO, HMO	(800) 533-2583
OND	Wellmark BCBS	Iowa/South Dakota	PPO, HMO	(800) 524-9242
ONE	Anthem BCBS of Indiana	Indiana	PPO, HMO	(800) 533-2583
ONF	CareFirst BCBS	Maryland/DC/VA	PPO, HMO	(800) 692-7459
ONG	BCBS of Massachusetts	Massachusetts	PPO, HMO	(800) 262-0820
ONH	BCBS of Minnesota	Minnesota	PPO, HMO	(800) 292-9371
ONI	Anthem BCBS of Indiana	Indiana	PPO, HMO	(800) 533-2583
ONJ	Wellmark BCBS	Iowa/South Dakota	PPO, HMO	(800) 524-9242
ONK	CareFirst BCBS	Maryland/DC/VA	PPO, HMO	(800) 692-7459
ONL	Anthem BCBS of Ohio	Ohio	PPO, HMO	(800) 331-1475
ONM	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
ONN	BCBS of South Carolina	South Carolina	PPO, HMO	(800) 288-2227
ONO	Blue Shield of California	California	PPO, HMO	(800) 676-2583
ONP	Anthem BCBS of Missouri	Missouri	PPO, HMO	(800) 331-1475
ONQ	BCBS of Alabama	Alabama	PPO, HMO	(800) 292-6662
ONR	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
ONS	BCBS of Alabama	Alabama	PPO, HMO	(800) 292-6662
ONT	BCBS of Massachusetts	Massachusetts	PPO, HMO	(800) 262-0820
ONU	CareFirst BCBS	Maryland/DC/VA	PPO, HMO	(800) 692-7459
ONV	CareFirst BCBS	Maryland/DC/VA	PPO, HMO	(800) 692-7459
ONW	Anthem BCBS of Indiana	Indiana	PPO, HMO	(800) 533-2583
ONX	Anthem BCBS of Indiana	Indiana	PPO, HMO	(800) 533-2583
ONY	BCBS of Minnesota	Minnesota	PPO, HMO	(800) 292-9371
ONZ	Anthem BCBS of Indiana	Indiana	PPO, HMO	(800) 533-2583
OOA	Blue Shield of California	California	PPO, HMO	(800) 676-2583
OOB	Blue Shield of California	California	PPO, HMO	(800) 676-2583
OOC	BCBS of Massachusetts	Massachusetts	PPO, HMO	(800) 262-0820
OOD	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276

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

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BCBS Prefix ORA to OZZ Assignment Table

The BCBS prefix range from ORA to OZZ covers Blue Cross Blue Shield plans across multiple states. The ORA to OZZ 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
ORA	BCBS of Massachusetts	Massachusetts	PPO, HMO	(800) 262-0820
ORB	Anthem BCBS of Ohio	Ohio	PPO, HMO	(800) 331-1475
ORC	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
ORD	Blue Shield of California	California	PPO, HMO, EPO	(800) 676-2583
ORE	CareFirst BCBS	Maryland/DC/VA	PPO, HMO	(800) 692-7459
ORF	Highmark BCBS PA	Pennsylvania	PPO, HMO	(800) 541-1524
ORG	BCBS of Western New York	New York	PPO, HMO	(800) 854-1790
ORH	Wellmark BCBS	Iowa/South Dakota	PPO, HMO	(800) 524-9242
ORI	BCBS of Alabama	Alabama	PPO, HMO	(800) 292-6662
ORJ	Florida Blue	Florida	PPO, HMO	(800) 352-2583
ORK	Anthem BCBS of Indiana	Indiana	PPO, HMO	(800) 533-2583
ORL	BCBS of Tennessee	Tennessee	PPO, HMO	(800) 467-2954
ORM	Anthem BCBS of Georgia	Georgia	PPO, HMO	(800) 772-1139
ORN	BCBS of Minnesota	Minnesota	PPO, HMO	(800) 292-9371
ORO	BCBS of South Carolina	South Carolina	PPO, HMO	(800) 288-2227
ORP	BCBS of Nebraska	Nebraska	PPO	(800) 432-3990
ORQ	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
ORR	BCBS of Massachusetts	Massachusetts	PPO, HMO	(800) 262-0820
ORS	Anthem BCBS of Ohio	Ohio	PPO, HMO	(800) 331-1475
ORT	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
ORU	CareFirst BCBS	Maryland/DC/VA	PPO, HMO	(800) 692-7459
ORV	Anthem BCBS of Indiana	Indiana	PPO, HMO	(800) 533-2583
ORW	BCBS of Tennessee	Tennessee	PPO, HMO	(800) 467-2954
ORX	Blue Cross of Idaho	Idaho	PPO, HMO	(800) 627-1183
ORY	Blue Shield of California	California	PPO, HMO, EPO	(800) 676-2583
ORZ	Horizon BCBS of New Jersey	New Jersey	PPO, HMO, POS	(800) 682-9090
OSA	BCBS of Michigan	Michigan	PPO, HMO	(800) 482-3276
OSB	BCBS of Alabama	Alabama	PPO	(800) 292-6662
OSY	BCBS of Kansas City	Kansas City	PPO, HMO	(816) 395-2222
OSZ	Anthem BCBS of Virginia	Virginia	PPO, HMO, EPO, POS	(800) 331-1475
OTA	Florida Blue	Florida	PPO, HMO	(800) 352-2583
OTB	Anthem BCBS of Virginia	Virginia	PPO, HMO, EPO, POS	(800) 331-1475
OTC	BCBS of Nebraska	Nebraska	PPO	(800) 432-3990
OTM	Blue Shield of California	California	PPO, HMO, EPO	(800) 676-2583
OTN	BCBS of North Dakota	North Dakota	PPO, HMO	(800) 342-4718
OTP	Blue Shield of California	California	PPO, HMO, EPO	(800) 676-2583
OTQ	Anthem BCBS of Connecticut	Connecticut	PPO, HMO	(800) 424-8730
OUY	BCBS of Michigan	Michigan	PPO, HMO, POS	(800) 482-3276
OUZ	BCBS of Michigan	Michigan	PPO, HMO, POS	(800) 482-3276
OVD	BCBS of Michigan	Michigan	PPO, HMO, POS	(800) 482-3276

The ORA to OZZ 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 OAA to OZZ?

The BCBS alpha prefixes from OAA to OZZ are three-character codes assigned to Blue Cross Blue Shield insurance plans. Each prefix in the OAA to OZZ range identifies the BCBS home plan, the state of origin, and the plan type (such as PPO, HMO, EPO, or POS). The OAA to OZZ 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 OAA to OZZ 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 OAA for BCBS of Massachusetts or OAE for Anthem BCBS of Ohio. The prefix system standardizes the identification of BCBS plans for claims processing and provider services.

Not all prefixes in the OAA to OZZ 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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Which BCBS Companies Use Prefixes in the OAA to OZZ Range?

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

health_and_safety BCBS of Massachusetts — Prefixes include OAA, OAB, OAC, OAD, OLA, OFA, OMQ, OMS, ONG, ONT, OOC, ORA, and ORR, covering PPO and HMO plans in Massachusetts.
health_and_safety BCBS of Michigan — Prefixes include OAH through OAN, OLD, OLI, OLQ, OLV, OLX through OLZ, OMC, OMG, OMP, OMT, OMW, OMX, OMZ, ONA, ONM, ONR, OOD, ORC, ORT, ORQ, OSA, OUY, OUZ, and OVD, covering PPO, HMO, and POS plans in Michigan.
health_and_safety Anthem BCBS of Ohio — Prefixes include OAE, OLB, OMA, OMB, ONB, ONL, ORB, and ORS, covering PPO, HMO, and EPO plans in Ohio.
health_and_safety Blue Shield of California — Prefixes include OAP, OLC, OLO, OMH, ONO, OOA, OOB, ORD, ORY, OTM, and OTP, covering PPO, HMO, and EPO plans in California.
health_and_safety CareFirst BCBS — Prefixes include OAO, OAV, OAW, OFE, OLL, OLS, OMV, ONF, ONK, ONU, ONV, ORE, and ORU, covering PPO, HMO, and POS plans in the Maryland, Washington D.C., and Virginia region.

These companies represent a portion of the independent BCBS licensees with prefixes in the OAA to OZZ 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 OAA to OZZ Prefix Table?

Reading the BCBS OAA to OZZ prefix table follows a systematic approach for accurate claims processing. The OAA to OZZ 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 plan prefix is the first set of letters in the member ID.

2 Match the Prefix

Scan the 'Prefix' column in the OAA to OZZ 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 OAA to OZZ Range?

Looking up a BCBS prefix in the OAA to OZZ 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.

1 Find the Three-Character Prefix on the ID Card

Look at the front of the member's BCBS insurance card. The three-letter alpha prefix is the first three characters of the member ID number. Record the prefix exactly as it appears.

2 Search the OAA to OZZ Prefix Table

Locate the prefix in the OAA to OZZ assignment tables above. Match the three-letter code to the corresponding row to identify the BCBS home plan, state, and plan type.

3 Call the Claims Phone Number to Confirm

Use the claims phone number from the table to contact the BCBS home plan directly. Verify the member's eligibility, benefits, and any specific claims submission requirements for the plan.

4 Document the Verification for Records

Record the verification details including the reference number, representative name, confirmed plan type, and coverage details. This documentation supports accurate claims submission and audit trails.

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What to Do When the OAA to OZZ Prefix Is Not in the Table?

When a BCBS prefix in the OAA to OZZ 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 OAA to OZZ Prefix Phone Numbers and Claims Filing Contacts

Each BCBS prefix in the OAA to OZZ 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 OAA prefix for BCBS of Massachusetts lists (800) 262-0820, while the OAP 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 OAA to OZZ 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.

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Claims Filing Addresses for OAA to OZZ BCBS Prefixes

Claims filing addresses for the OAA to OZZ 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.

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. For paper claims, the mailing address is specific to the BCBS company and 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 and submission requirements.

BCBS Plan Types Identified by OAA to OZZ Prefixes

The OAA to OZZ 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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PPO (Preferred Provider Organization)

PPO plans identified by OAA to OZZ prefixes allow members to visit both in-network and out-of-network providers. In-network providers offer lower out-of-pocket costs, while out-of-network providers are covered at a reduced rate. PPO plans do not require referrals for specialist visits. Medical billers processing claims for PPO plans should verify whether the provider is in-network or out-of-network to apply the correct benefits and reimbursement rates.

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HMO (Health Maintenance Organization)

HMO plans in the OAA to OZZ prefix range require members to use in-network providers and obtain referrals from a primary care physician (PCP) for specialist care. HMO plans typically have lower premiums and out-of-pocket costs compared to PPO plans. Claims for HMO plans must be submitted to in-network providers, and services rendered by out-of-network providers are generally not covered except in emergencies. Billers must confirm that the referring PCP and the specialist are both in-network for the HMO plan.

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EPO (Exclusive Provider Organization)

EPO plans identified by OAA to OZZ prefixes require members to use in-network providers but do not require referrals for specialist visits. EPO plans combine elements of PPO and HMO plans by restricting coverage to in-network providers while eliminating the referral requirement. Out-of-network services are not covered except in emergencies. Billers must verify that the provider is in-network for the specific EPO plan before submitting claims.

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POS (Point of Service)

POS plans in the OAA to OZZ prefix range combine features of HMO and PPO plans. Members choose a primary care physician and can receive referrals to see specialists either in-network or out-of-network. In-network care is covered at a higher rate, while out-of-network care requires higher out-of-pocket costs. POS plans offer flexibility in provider choice while maintaining the structure of a managed care plan. Billers should verify referral requirements and network status when processing POS plan claims.

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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 OAA to OZZ Prefix Range

The OAA to OZZ BCBS prefix range covers BCBS plans from multiple states across the United States. States represented in this range include Massachusetts, Ohio, New York, Nebraska, Michigan, California, Pennsylvania, Iowa, South Dakota, Oklahoma, Louisiana, Missouri, Colorado, Idaho, New Jersey, Alabama, Virginia, Florida, North Dakota, Connecticut, Tennessee, Alaska, Arizona, Arkansas, South Carolina, Rhode Island, Vermont, Minnesota, Georgia, Indiana, Kansas City, and Maryland/Washington D.C. Each state has one or more independent BCBS licensees that operate within its borders.

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BCBS of Massachusetts Prefixes in the O Range

BCBS of Massachusetts holds multiple prefixes within the OAA to OZZ range, including OAA, OAB, OAC, OAD, OLA, OFA, OMQ, OMS, ONG, ONT, OOC, ORA, and ORR. Each prefix identifies a specific product line or plan category within BCBS of Massachusetts. The OAA prefix is a widely recognized identifier for BCBS of Massachusetts, covering PPO and HMO plans. BCBS of Massachusetts claims department can be reached at (800) 262-0820 for most Massachusetts prefixes in the O range.

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Anthem BCBS of Ohio Prefixes in the O Range

Anthem BCBS of Ohio holds prefixes including OAE, OLB, OMA, OMB, ONB, ONL, ORB, and ORS within the OAA to OZZ range. These prefixes cover PPO, HMO, and EPO plans for Ohio residents. Anthem BCBS of Ohio's claims department can be reached at (800) 331-1475.

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BCBS of Michigan Prefixes in the O Range

BCBS of Michigan holds the largest number of prefixes in the OAA to OZZ range, including OAH through OAN, OLD, OLI, OLQ, OLV, OLX through OLZ, OMC, OMG, OMP, OMT, OMW, OMX, OMZ, ONA, ONM, ONR, OOD, ORC, ORT, ORQ, OSA, OUY, OUZ, and OVD. These prefixes cover PPO, HMO, and POS plans for Michigan residents. BCBS of Michigan's claims department can be reached at (800) 482-3276.

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California BCBS Prefixes in the O Range

California is served by both Blue Shield of California and Anthem Blue Cross. Blue Shield of California prefixes in the O range include OAP, OLC, OLO, OMH, ONO, OOA, OOB, ORD, ORY, OTM, and OTP, reachable at (800) 676-2583. Anthem Blue Cross prefixes include OAQ, OLE, OLF, OMF, OMM, OMN, and OMO, reachable at (800) 288-9294.

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BCBS of Western New York Prefixes in the O Range

BCBS of Western New York holds prefixes OAF, OLP, OLW, and OFG within the OAA to OZZ range, covering PPO and HMO plans. BCBS of Western New York's claims department can be reached at (800) 854-1790.

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Pennsylvania BCBS Prefixes in the O Range

Pennsylvania is served by Highmark BCBS PA and Independence Blue Cross. Highmark BCBS PA prefixes include OAR, OFF, and ORF, reachable at (800) 541-1524. Independence Blue Cross prefixes include OBM, OMD, and OMJ, reachable at (800) 275-2583.

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Other States in the OAA to OZZ Prefix Range

Additional states represented in the OAA to OZZ prefix range include Nebraska (OAG, OFP, ORP, OTC), Oklahoma (OAT), Louisiana (OAU), Kansas City (OAX, OSY), Colorado (OAY, OLU), Missouri (OAZ, OMK, ONP), Idaho (OBA, OMU, ORX), New Jersey (OBB, ORZ), Alabama (OBC, OFI, OLN, ONQ, ONS, ORI, OSB), Virginia (OBD, OSZ, OTB), Florida (OBE, OFJ, OML, ORJ, OTA), North Dakota (OBF, OTN), Connecticut (OBG, OTQ), Tennessee (OBH, OFL, OLJ, OLK, ORL, ORW), Alaska (OBI, OLG), Arizona (OBJ, OLH), Arkansas (OBK, OLM), South Carolina (OBL, OFO, OLR, ONN, ORO), Rhode Island (OBN, OMR), Vermont (OBO, OMY), Minnesota (OBP, OFN, ONH, ONY, ORN), Georgia (OBQ, OFM, OMI, ORM), and Indiana (OBR, OFK, ONC, ONE, ONI, ONW, ONX, ONZ, ORK, ORV). Each state's BCBS licensee maintains its own claims processing operations.

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How to Use OAA to OZZ Prefixes for Insurance Eligibility Verification?

Using BCBS alpha prefixes in the OAA to OZZ range for insurance eligibility verification follows a structured process. The OAA to OZZ 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 OAA to OZZ 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 OAA to OZZ BCBS Prefix?

Routing claims using the OAA to OZZ 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 OAA to OZZ 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 OAA to OZZ Include Alphanumeric?

The OAA to OZZ 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 OAA to OZZ 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 OAA to OZZ range can be associated with a BCBS company that operates across multiple states. For example, CareFirst BCBS operates in Maryland, Washington D.C., and Virginia under prefixes such as OAO, OAV, and OAW. 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.