Ambetter (Centene) Timely Filing Limit
Ambetter (Centene) allows 120–180 days (state-specific) for initial claim submission, counted from date of service.
- Initial claims
- 120–180 days (state-specific)
- Counted from
- Date of service
- Appeals
- Commonly 60–90 days — check your state's provider manual
- Category
- National Commercial
Published default as of 2026 — individual participation agreements and plan documents override payer defaults. Always verify against your contract and the current provider manual.
What billers should know
Centene's marketplace brand publishes state-specific provider manuals; 120 days is common but several states differ. Centene's Medicaid MCOs (different brand names by state) have their own limits.
Missed the Ambetter (Centene) deadline?
- 1
Pull your proof of timely submission — clearinghouse acceptance reports (277CA), payer portal submission logs, or EDI acknowledgments. If the claim was submitted in time and lost or rejected downstream, most payers must reopen it.
- 2
The denial arrives as CO-29 — appeal with documentation, citing the original submission date and any payer-side errors (wrong member ID on file, retroactive eligibility, COB delays).
- 3
If the miss is genuinely yours, write it off correctly: timely filing denials are a contractual adjustment — billing the patient for them violates most network agreements.
- 4
Fix the root cause: charges should leave the door within 48–72 hours of the encounter, with a worklist for anything unbilled after 7 days.
OakClaim files every claim within 48 hours — no deadline math required.
Free audit shows how much late filing and unworked denials are costing you.