FECA & Policy Group Number on CMS-1500 Box 11: A Comprehensive Guide to Billing & Common Errors

Navigating the complexities of medical billing, particularly when it comes to accurately populating the FECA & Policy Group Number on CMS-1500 Box 11, can be a significant hurdle for even seasoned billing professionals. This crucial field serves as a primary identifier for the patient’s specific insurance plan or workers’ compensation claim, directly impacting claim adjudication and reimbursement. Errors here often lead to immediate denials, delayed payments, and increased administrative burden. This comprehensive guide, crafted by RCM experts, delves deep into the nuances of Box 11, providing decisive, authoritative insights to ensure your claims are processed efficiently and accurately, minimizing rejections and optimizing your revenue cycle.

Quick Reference Guide

For immediate clarity, this table outlines the essential information required for CMS-1500 Box 11 across various common payer types. Always refer to the specific payer’s guidelines for the most up-to-date requirements.

Payer Type	Box 11 Field	Required Information	Notes/Examples
FECA (OWCP)	FECA Claim Number	7-digit claim number, often preceded by a 1-2 letter prefix (e.g., CA, CM, DC, A-Z).	Mark Box 11a “YES”. Example: CA1234567. This is the patient’s specific OWCP claim ID.
Medicare	Not Applicable (Primary)	Generally left blank for primary Medicare claims.	Medicare does not use a “group number” in Box 11 for primary claims. Patient’s MBI is in Box 1.
Medicare (Secondary)	Primary Payer Info	Name of primary insurer, policy/group number of primary insurer.	Used for Coordination of Benefits (COB). Box 11c for group number of primary.
Commercial Payers	Policy Group Number	The group number assigned to the employer or organization sponsoring the plan.	Found on the patient’s insurance card. Crucial for identifying the specific plan benefits.
Medicaid	Not Applicable (Primary)	Generally left blank for primary Medicaid claims.	Medicaid typically uses the patient’s ID in Box 1a. Some state-specific plans may have group numbers.
TRICARE	Not Applicable	Generally left blank.	TRICARE uses the sponsor’s SSN or DoD ID number in Box 1a.

Detailed Breakdown: Mastering CMS-1500 Box 11

Box 11 on the CMS-1500 form is a critical data element, designed to capture essential information about the insured’s policy or claim, particularly when the patient has other health insurance coverage or is covered under a special program like FECA. Understanding its nuances is paramount for accurate billing and timely reimbursement.

Understanding CMS-1500 Box 11: The Core of Payer Identification

Box 11, titled “Insured’s Policy Group or FECA Number,” is where you provide details about the patient’s insurance coverage, especially if it’s not the primary coverage or if it’s a specific type of claim like a workers’ compensation case under the Federal Employees’ Compensation Act (FECA). This box is subdivided into several fields (11a-11d) to capture comprehensive information, including the insured’s policy number, group number, and whether the claim is related to employment, auto accident, or other accident.

The Federal Employees’ Compensation Act (FECA) Number

For federal employees injured on the job, the Office of Workers’ Compensation Programs (OWCP) manages their medical claims under the Federal Employees’ Compensation Act (FECA). Billing for these services requires specific attention to the FECA number.

What is a FECA Number?

A FECA number, also commonly referred to as an OWCP claim number, is a unique identifier assigned by the Department of Labor’s OWCP to a federal employee’s work-related injury or illness claim. This number is crucial for tracking all medical services, lost wages, and other benefits associated with that specific claim. When you hear “what is a FECA number” or “what is feca number,” it refers to this unique identifier that distinguishes a federal workers’ compensation claim from standard health insurance policies. It’s the cornerstone of feca number in medical billing.

Where to Find the FECA Number

One of the most common challenges is locating the correct FECA number on insurance card or other patient documents. Unlike commercial insurance, FECA doesn’t issue a traditional “insurance card” in the same way. Here’s where to look:

• OWCP ID Card: Upon approval of a claim, the OWCP typically issues an official ID card to the injured federal employee. This card will prominently display the FECA claim number.
• Official OWCP Correspondence: Any letters, approval notices, or other official documents received by the patient from the OWCP will contain the FECA claim number. This is often the most reliable source.
• Patient Information: The patient themselves should be able to provide their FECA number. It’s vital to educate federal employees about the importance of having this number readily available for their healthcare providers.
• Employer/Agency: In some cases, the federal agency that employs the patient may be able to provide the FECA number, especially for newly reported injuries.

Always verify the number with the patient or official documentation to prevent denials.

FECA Number vs. Claim Number: Is the Policy Group or FECA Number on the CMS-1500 Form the Same as the Claim Number?

Yes, for FECA claims, the “FECA Number” is synonymous with the “OWCP Claim Number.” When the CMS-1500 form asks for the “Insured’s Policy Group or FECA Number” in Box 11, and you are billing for a federal workers’ compensation case, you will enter the OWCP Claim Number. This is the specific identifier for that individual’s work injury claim. It is not a general policy group number like those found on commercial insurance cards; it’s a unique claim-specific identifier.

Billing FECA on CMS-1500 Box 11

When billing for FECA services, accuracy in box 11 cms 1500 is paramount:

• Box 11: Enter the patient’s 7-digit FECA claim number. This number is often preceded by a 1-2 letter prefix (e.g., CA, CM, DC, A-Z). For example, if the FECA number is CA1234567, you would enter “CA1234567” in Box 11.
• Box 11a: Mark “YES” to indicate that the claim is related to employment. This signals to the OWCP that it’s a work-related injury.
• Box 11b: Leave blank (not an auto accident).
• Box 11c: Leave blank (not another accident).
• Box 11d: Enter “OWCP” or “FECA” as the payer name if applicable, though this field is primarily for secondary payers.

Remember, the FECA number is the primary identifier for these claims, and its correct entry is non-negotiable for successful processing.

The Policy Group Number: Beyond FECA

While the FECA number is specific to federal workers’ compensation, the “Policy Group Number” aspect of Box 11 applies to most other types of insurance, particularly commercial plans.

What is a Policy Group Number?

A policy group number is an alphanumeric identifier assigned by an insurance carrier to a specific group health plan. This number helps the payer identify the employer, organization, or association that sponsors the insurance plan, allowing them to correctly apply benefits, deductibles, and copayments specific to that group. It’s distinct from the individual policyholder’s ID number, which identifies the individual within that group. Understanding the difference between the policy group or feca number is critical for accurate billing.

Policy Group Number for Commercial Payers

For commercial insurance claims, the policy group number is almost always required in Box 11. This number is typically found on the patient’s insurance card, often labeled as “Group #,” “Plan #,” or “GRP.” It’s essential to enter this number accurately, as it links the individual patient to their specific employer-sponsored or association-sponsored health plan. Without it, the payer may not be able to locate the correct benefit structure, leading to denials (e.g., “member not found” or “invalid group number”).

Policy Group Number for Medicare & Medicaid

When it comes to cms 1500 box 11 medicare, it’s important to note that Medicare (both Part A and Part B) generally does not use a “group number” in the traditional sense for primary claims. For primary Medicare claims, Box 11 is typically left blank. The patient’s Medicare Beneficiary Identifier (MBI) in Box 1a is sufficient for identification. However, if Medicare is secondary, Box 11 will be used to provide information about the primary payer’s policy, including their group number if applicable.

Similarly, for primary Medicaid claims, a “group number” is often not applicable in Box 11. Medicaid programs typically identify beneficiaries using their state-issued Medicaid ID number, which is entered in Box 1a. Some state-specific managed care Medicaid plans might have a group number, but this is less common than with commercial plans. Always consult state-specific Medicaid billing guidelines.

Policy Group Number for TRICARE

TRICARE, the healthcare program for uniformed service members, retirees, and their families, also does not typically use a “group number” in Box 11. TRICARE beneficiaries are identified by the sponsor’s Social Security Number (SSN) or DoD ID number, which is entered in Box 1a of the CMS-1500 form. Box 11 is generally left blank for primary TRICARE claims.

2026 Updates and Future Considerations

As we move into 2026, the landscape of medical billing continues to evolve, driven by technological advancements and regulatory changes. While no major overhauls to CMS-1500 Box 11 are currently anticipated specifically for FECA or policy group numbers, billing professionals must remain vigilant. The Centers for Medicare & Medicaid Services (CMS) and other payers continuously refine their electronic claim submission standards (e.g., X12 837P). These updates often involve more stringent data validation rules, requiring even greater precision in fields like Box 11. Practices should regularly consult official CMS publications, payer-specific billing manuals, and industry news to stay abreast of any changes that might impact data entry requirements or claim processing logic for FECA and policy group numbers.

Real-World Billing Scenarios & Patient Status Changes

Understanding the theory is one thing; applying it in real-world scenarios is another. Here are common situations and how to correctly populate CMS-1500 Box 11.

Scenario 1: New FECA Claim for a Federal Employee

Situation: A federal employee presents with a new work-related injury. They have an OWCP ID card with FECA number “DC9876543.”

• Box 11: Enter “DC9876543”
• Box 11a: Mark “YES”
• Box 11b & 11c: Leave blank
• Box 11d: Leave blank (or enter “OWCP” if your system requires a payer name here)
• Key Action: Ensure you have the official FECA number. Do not use a personal health insurance policy number.

Scenario 2: Commercial Payer with a Group Number

Situation: A patient has Blue Cross Blue Shield through their employer. Their insurance card shows “Member ID: XYZ1234567” and “Group #: GRP-ABC.”

• Box 11: Leave blank (This box is for other insurance or special programs. The primary policy number is in Box 1a.)
• Box 11a: If this is the primary insurance, you would typically leave Box 11 blank and put the group number in Box 11c if there was another primary payer. However, for standard commercial primary claims, the group number is often entered in the electronic equivalent of Box 11c, or sometimes directly in Box 11 if no other insurance is present and the payer specifically requests it there. Always check payer-specific guidelines. For most commercial claims, the group number is part of the electronic submission data elements but might not be explicitly typed into Box 11 on the paper form if it’s the primary payer. If there is other insurance, then Box 11 would contain the policy/group number of that other insurance. Let’s re-evaluate this for clarity.

Revised Scenario 2: Commercial Payer with a Group Number (Primary Coverage)

Situation: A patient has Blue Cross Blue Shield through their employer. Their insurance card shows “Member ID: XYZ1234567” and “Group #: GRP-ABC.” This is their primary insurance.

• Box 1a: Enter “XYZ1234567” (Insured’s ID Number)
• Box 11: Leave blank.
• Box 11a: Leave blank.
• Box 11c: Enter “GRP-ABC” (Insured’s Group Number). This is the standard placement for the group number when it’s the primary commercial insurance.
• Key Action: Differentiate between the individual policy ID (Box 1a) and the group number (Box 11c).

Scenario 3: Medicare Primary, No Group Number

Situation: A patient has Medicare Part B as their primary insurance.

• Box 1a: Enter the patient’s MBI (Medicare Beneficiary Identifier).
• Box 11: Leave blank.
• Box 11a, 11b, 11c, 11d: Leave blank.
• Key Action: Medicare does not use a group number in Box 11 for primary claims.

Scenario 4: Patient Transitioning from Commercial to FECA

Situation: A patient initially sought treatment for an injury under their commercial insurance. Later, it was determined to be work-related, and an OWCP claim was approved with FECA number “CM0011223.”

• Initial Claims: Billed to commercial insurance with their policy and group numbers.
• New Claims (after FECA approval):
  • Box 11: Enter “CM0011223”
  • Box 11a: Mark “YES”
  • Box 11b & 11c: Leave blank
  • Box 11d: Leave blank
• Retroactive Billing: If commercial claims need to be re-billed to OWCP, ensure all commercial payments are refunded or adjusted, and then submit new claims to OWCP with the correct FECA number.
• Key Action: Understand that the payer entirely changes. The FECA number becomes the sole identifier for the work-related injury.

Scenario 5: Dual Coverage (e.g., FECA and Commercial)

Situation: A federal employee has a FECA claim for a work injury, but also has personal commercial health insurance. The services are for the work injury.

• Box 11: Enter the FECA number (e.g., “CA5432109”).
• Box 11a: Mark “YES.”
• Box 11b & 11c: Leave blank.
• Box 11d: Leave blank.
• Key Action: For work-related injuries, FECA is almost always the primary payer. Do NOT bill the commercial insurance for the work injury unless specifically instructed by OWCP for very rare circumstances (e.g., non-covered services by OWCP). The FECA number takes precedence for work-related claims.

Common Denial Codes & Step-by-Step Appeal Instructions

Errors in Box 11 are a frequent cause of claim denials. Understanding the common denial codes and having a clear appeal process is vital for maintaining a healthy revenue cycle.

Understanding Denial Codes Related to Box 11

When a claim is denied due to issues with the FECA or policy group number, you’ll typically see specific Claim Adjustment Reason Codes (CARCs) and Remittance Advice Remark Codes (RARCs) on the Explanation of Benefits (EOB) or Electronic Remittance Advice (ERA).

CO-16: Claim/Service lacks information which is needed for adjudication.

• Explanation: This is a broad denial code, but it frequently appears when Box 11 (or its electronic equivalent) is missing crucial information, such as the FECA number or a commercial policy group number. The payer cannot process the claim because they lack the necessary identifier to link it to a specific plan or claim.
• Common Causes:
  • FECA number missing or incorrect.
  • Commercial group number missing or incorrect.
  • Box 11a not marked “YES” for a FECA claim.
  • Incorrect policy number entered in Box 11 (e.g., entering a FECA number where a commercial group number is expected, or vice-versa).
• Resolution Steps:
  1. Verify Information: Contact the patient or review their documentation (OWCP ID card, commercial insurance card) to confirm the correct FECA or policy group number.
  2. Review CMS-1500: Carefully check Box 11 and its sub-fields for accuracy and completeness. Ensure Box 11a is marked correctly for FECA claims.
  3. Payer-Specific Guidelines: Consult the payer’s billing manual or website for specific requirements for Box 11. Some payers have unique formatting rules.
  4. Correct and Resubmit: Make the necessary corrections to the claim form and resubmit it. Do not appeal a claim that simply needs correction and resubmission.

M86: Missing/incomplete/invalid group number.

• Explanation: This RARC specifically indicates an issue with the group number provided. It’s often seen with commercial payers when the group number in Box 11c (or its electronic equivalent) is either absent, partially entered, or does not match the payer’s records for the policyholder.
• Common Causes:
  • Group number was omitted.
  • Typographical error in the group number.
  • Patient provided an outdated or incorrect group number.
  • The group number belongs to a different plan or carrier.
• Resolution Steps:
  1. Obtain Correct Group Number: Contact the patient or their employer to get the accurate and current group number from their insurance card or plan documents.
  2. Verify Payer: Confirm that the group number corresponds to the payer you are billing. Sometimes patients have multiple plans.
  3. Correct and Resubmit: Update Box 11c with the correct group number and resubmit the claim.

Specific Error Code: H24235 – Invalid FECA Claim Number Format

• Explanation: This specific error code, often encountered when billing OWCP, indicates that the FECA claim number submitted in Box 11 (or its electronic equivalent) does not conform to the expected format or is not recognized by the OWCP system. It could be a typo, a missing prefix, an incorrect number of digits, or even an inactive claim number. OWCP systems are highly sensitive to the precise format of these identifiers.
• Resolution Steps:
  1. Verify the FECA Number Meticulously: This is the most critical step.
     • Contact the patient directly and ask them to read the FECA number from their official OWCP ID card or any official OWCP correspondence.
     • Ensure the number includes the correct 1-2 letter prefix (e.g., “CA,” “CM,” “DF,” “DC,” “A,” “B,” “C,” “D,” “E,” “F,” “G,” “H,” “I,” “J,” “K,” “L,” “M,” “N,” “O,” “P,” “Q,” “R,” “S,” “T,” “U,” “V,” “W,” “X,” “Y,” “Z”) followed by the correct number of digits (typically 7).
     • Double-check for any transposed numbers or missing characters.
  2. Confirm Box 11a Setting: For FECA claims, Box 11a MUST be marked “YES” to indicate a work-related illness/injury. An incorrect setting here can also lead to processing errors.
  3. Review Electronic Submission Mapping: If submitting electronically (837P), ensure the FECA number is mapped correctly to the appropriate field. For OWCP, this is typically in Loop 2010BA, REF02 with qualifier ‘F8’ (FECA Claim Number). Verify your clearinghouse or practice management system’s mapping.
  4. Contact OWCP District Office: If the number appears correct after thorough verification but still denies with H24235, contact the specific OWCP district office responsible for the claim. Provide them with the patient’s name, date of birth, and the FECA number you are using. They can verify the number’

     FAQ: Common Questions Answered

     What is a FECA number and where can I find it on an insurance card?

     A FECA (Federal Employees’ Compensation Act) number is the specific claim identification number assigned by the Office of Workers’ Compensation Programs (OWCP) for federal employees’ work-related injuries or illnesses. It typically consists of a 1-2 letter prefix (e.g., CA, CM, DC) followed by a 7-digit number (e.g., CA1234567). Unlike commercial insurance, you generally won’t find a FECA number on a standard insurance card. Instead, this crucial identifier is provided to the patient directly by the OWCP, usually on official claim acceptance letters or other correspondence related to their workers’ compensation claim. It’s essential to obtain this exact number from the patient’s OWCP documentation.

     How do I correctly enter the FECA & Policy Group number in CMS-1500 Box 11?

     For FECA claims, you must enter the complete FECA claim number, including its 1-2 letter prefix and 7-digit sequence (e.g., CA1234567), directly into Box 11. Crucially, you must also mark Box 11a “YES” to indicate that the claim is related to an employment-related illness or injury. For other payer types, Box 11 is used for the patient’s policy or group number from their primary insurance. For instance, with commercial insurance, the group number is typically entered in Box 11c. It’s important to note that for primary Medicare claims, Box 11 is generally left blank, as Medicare uses the patient’s MBI in Box 1 as its primary identifier and does not utilize a group number in this field.

     What are the most common billing errors for FECA claims and how can they be resolved?

     The most common billing errors for FECA claims in Box 11 revolve around incorrect or incomplete entry of the FECA claim number. This includes omitting the required 1-2 letter prefix, entering an incorrect 7-digit number, or failing to mark Box 11a “YES.” Another frequent error is mistakenly using the patient’s Social Security Number or a different identifier instead of the specific OWCP claim number. These errors invariably lead to immediate denials and processing delays. To resolve them, always verify the FECA claim number directly from the patient’s official OWCP documentation, ensuring the prefix and 7-digit sequence are exact. Confirm that Box 11a is marked “YES.” Once verified, correct the claim and resubmit it promptly to minimize revenue cycle disruptions.

     Why is Box 11 left blank for primary Medicare claims?

     Box 11 is generally left blank for primary Medicare claims because Medicare, as a federal health insurance program, does not utilize a traditional “group number” in the same manner as commercial insurance plans. Instead, the primary identifier for Medicare beneficiaries is the Medicare Beneficiary Identifier (MBI), which is entered in Box 1 of the CMS-1500 form. Box 11 is primarily designed to capture policy or group numbers from other insurance plans, particularly when Medicare is acting as a secondary payer (for Coordination of Benefits) or for specific claim types like FECA. Therefore, leaving Box 11 blank for primary Medicare claims is the correct procedure, as per Medicare’s billing guidelines.

External Resources & Authority Links

• For more detailed insights, refer to the official CMS Medicare guidelines.
• For more detailed insights, refer to the CMS guidelines.