277CA Claim Acknowledgment Parser

The 277CA is the acknowledgment transaction a payer or clearinghouse sends in response to an 837 claim submission. It confirms whether each submitted claim was accepted into adjudication or rejected at the front gate, before any payment determination is made. A 277CA rejection is distinct from an 835 denial: a rejected claim never entered adjudication and must be corrected and resubmitted. An 835 denial means the claim was adjudicated and payment was declined.

The 277CA parser reads the STC (Claim Status) segment, which carries the status category code (STC01-1) and status detail code (STC01-2). The category codes classify the overall status: A3 means accepted, A6/A7/A8 indicate different rejection types, and P-prefix codes indicate pending status. The detail codes identify the specific field or condition causing the rejection — for example, code 45 (missing or invalid NPI) or code 72 (invalid or missing service dates).

All parsing runs in the browser. No file content is transmitted. The PHI whitelist hard-skips subscriber name (NM1*IL), patient name (NM1*QC), member ID (REF*1W), SSN (REF*SY), and all other patient-identifiable segments before their values are read. The parser extracts only status codes, payer name, submitter name, and transaction date.

• 835 ERA Parser — parse remittance files after adjudication
• Timely filing calculator — verify resubmission windows
• Denial code lookup — CARC and RARC definitions
• Denial Decoder — identify appeal strategy for a specific code