277 — Claim Status

The 277 transaction carries claim status responses from payers, indicating whether a claim was accepted, rejected, or requires additional information. RCMbox provides a built-in mapping activity (map-277-to-claim-responses) that converts parsed 277 data into FHIR ClaimResponse resources.

What the built-in mapping extracts

• HL hierarchy — traverses Source → Receiver → Provider → Patient → Claim levels
• STC segments — status category code, status code, and entity code stored as FHIR extensions
• Action code mapping — STC03 mapped to ClaimResponse.outcome (e.g., U → error, WQ → queued)
• Contained resources — Patient (from IL NM1), Payer (from PR NM1), Provider (from 1P/85 NM1)
• Identifiers — PCN, payer claim control number, clearinghouse trace number
• Service lines — from 2220D loops with SVC segments

Used in

• Upload Claim Status workflow
• Link ClaimResponse workflow (downstream)