Start with the X12 envelope
Control numbers, transaction boundaries, segment counts, and implementation-version clues can reveal obvious structural problems before submission.
Review claim totals and service lines
Compare claim-level charges with service-line charges and review identifiers, dates, procedure information, diagnosis references, and provider roles.
Use receiver-specific requirements
A structurally reasonable 837P can still fail payer edits or companion-guide requirements. Review the payer or clearinghouse documentation for the specific connection you use.
Use the free first-pass viewer
The MedClaimSoftware 837P Validator & Viewer can display a readable claim summary and perform basic envelope, total, and NPI checks in the browser. It is not a complete implementation-guide validator.
Sources and verification
Paper or electronic professional claims?
Choose the workflow that matches how you need to deliver the claim.