Health insurance denial & claim adjustment codes

What health insurance denial code 29 means on your EOB

The claim arrived after the plan's filing deadline. This one matters enormously: if the provider filed late, most network contracts forbid billing you for it at all.

What usually causes it

• The provider submitted after the deadline.
• The claim went to the wrong payer first and was refiled too late.
• A prior payer's processing consumed the window.

The documents that decide it

• The date of service and the date the claim was filed.
• The plan's timely-filing limit.
• The provider's network contract status.

What to do next

If the provider was in-network and filed late, you generally cannot be billed. Ask for the filing date in writing before paying anything.

This page explains what a code means. It is information, not advice — it does not tell you whether your specific claim should have been paid, and it is not legal, medical, or insurance advice. Your plan documents and your denial notice govern your situation.