Pick the insurer and the session date. See the last day to file, and the last day to appeal if you have a decision.
If the clearinghouse or insurer rejected it at the front door, the clock kept running. Only an accepted claim counts.
Most insurers want corrected claims inside the original limit, counted from the session date.
Many insurers set the limit in each provider agreement. If yours says something else, your contract wins.
In-network claims denied for late filing usually can't be billed to the client. Keep clearinghouse acceptance reports as proof.
Limits from each insurer's provider manual, policy or state rules, checked October 2026. Sources are linked on each result. General guidance only; your provider agreement comes first.
Claims sent within 48 hours, rejections worked within 5 working days, for a flat monthly fee. It starts with a free check of your unpaid claims.