What M80 means
The payer doesn't pay this service in the same session as a previously processed service.
How to fix it
- Review bundling and same-session rules
- Appeal with documentation if separate sessions
Check the remark code (RARC) that came with the denial and the payer's own policy, since rules vary by payer and plan. This is a plain-English summary written by GetMax; the official code text is published by X12 at x12.org/codes.
Prevent it next time
Most denials are caused before the claim is sent. See 12 ways to reduce claim denials, or let our denial management team work them for you.