Payer appeal deadlines & denial-code reference (verified against primary sources)
Reference tables for provider billing teams: payer appeal deadlines, dispute-filing windows, and denial-code guidance. Every number is quoted verbatim from a primary source — the payer's own administrative guide, the California regulation, or the federal rule — with the source linked and its effective date shown. Values that could not be verified against a primary source are marked for you to confirm in your provider manual, never asserted as fact.
How we verify: About this data: how every number here is verified. Download the verified dataset: CSV · JSON (Creative Commons Attribution 4.0 (CC BY 4.0)).
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Payers
- UnitedHealthcare appeal deadlines & timely filing (2026, verified)
- Anthem Blue Cross (California) appeal deadlines & timely filing (2026, verified)
- Blue Shield of California appeal deadlines & timely filing (2026, verified)
- Aetna (California) appeal deadlines & timely filing (2026, verified)
- Cigna (California) appeal deadlines & timely filing (2026, verified)
- Health Net (California) appeal deadlines & timely filing (2026, verified)
- Kaiser Permanente provider disputes: why it is a special case (verified)
- Molina Healthcare (California) appeal deadlines & timely filing (2026, verified)
- Oscar Health in California: dispute windows have lapsed (verified)
Rule families (by regulator)
- California DMHC-regulated commercial plans: provider dispute deadlines (2026, verified)
- California CDI-regulated PPO and indemnity insurers: provider dispute deadlines (2026, verified)
- ERISA self-funded plan appeal deadlines (2026, verified)
- Medicare Advantage appeal deadlines for providers (2026, verified)
- Medi-Cal managed care appeal deadlines (2026, verified)