Claim appeals in depth: levels, deadlines and documentation
A claim appeal is a formal request that a payer reverse a denial or correct an underpayment. Strong appeals are filed inside the payer’s deadline, cite the payer’s own policy and attach the records that prove the service was covered and correctly billed.
Medicare appeal levels
Original Medicare has five levels of appeal. The time limits below run from receipt of the prior decision.
| Level | Reviewer | Time to request |
|---|---|---|
| 1. Redetermination | Medicare Administrative Contractor | 120 days |
| 2. Reconsideration | Qualified Independent Contractor | 180 days |
| 3. Hearing | Administrative law judge (OMHA) | 60 days |
| 4. Review | Medicare Appeals Council | 60 days |
| 5. Judicial review | Federal district court | 60 days |
Levels 3 and 5 also have a minimum amount in controversy that CMS updates each year.
Commercial and Medicaid appeals
Commercial payers set appeal windows in the provider contract and the denial letter, and many allow one or more internal levels plus external review. State Medicaid and Medicaid managed care plans follow state rules. Always read the appeal instructions on the denial letter before the clock runs out.
What to include in an appeal
- Claim number, patient, date of service and denial reason code
- A short letter that states what is being appealed and why the payer’s decision is wrong
- Medical records, operative or visit notes and test results that support the service
- Proof of authorization, referral or timely filing where relevant
- The payer policy, LCD/NCD or coding guideline that supports payment
Common reasons appeals fail
- Missed deadline or wrong submission channel
- No supporting documentation attached
- Appealing a data error that should have been fixed with a corrected claim
- Not escalating when an internal level is upheld
How appeals are managed
- Log the deadline the day the denial is received.
- Group denials by cause so one strong argument can support many appeals.
- Submit through the payer’s required portal, fax or mail method and keep proof of delivery.
- Follow up at the payer’s stated review time and escalate to the next level when needed.
- Feed the outcome back into denial prevention.






