Parse X12 837 Claim Files to CSV — Directly in Your Browser

Why Parse 837 Claim Files to CSV?

The X12 837 transaction set carries dense, nested claim data — subscriber demographics, provider identifiers, service lines, procedure codes, and diagnosis pointers — all packed into a single flat text file. Converting an 837 to CSV makes it possible to open claim data in Excel, load it into a BI tool, or reconcile it against a practice management system without writing a custom EDI parser. Because this tool runs entirely in your browser, the file content is never uploaded to any server — useful for teams who prefer not to send sensitive business files to online conversion services. This tool performs structural parsing only; it does not validate or certify data against any medical, financial, or legal schema.

Common Segments Extracted from 837 Files

• CLM — Claim Information (claim ID, total charge, facility code)
• NM1 — Subscriber, patient, provider and payer names
• HI — Diagnosis codes (ICD-10)
• SV1 / SV2 — Professional or institutional service lines with CPT/HCPCS codes
• DTM — Service dates