Which document is used to submit supporting materials with a claim?

• A. Claims attachment
• B. EOB
• C. Remittance Advice
• D. Authorization

Answer: (A)

Submitting supporting materials with a claim is handled by a claims attachment. This document type lets you attach medical records, lab results, operative reports, and other documentation that explains or supports the services billed, helping the payer adjudicate the claim accurately. The Explanation of Benefits is what a payer sends after processing to detail what was paid or denied, not something you submit with the claim. Remittance Advice provides payment details after processing, and Authorization is pre-approval for services. Therefore, the claims attachment is the appropriate document for attaching supporting materials to a claim.