Prerequisites
- The denial is genuinely a denial, not a 277CA rejection — see Submit clean claims
- The appeal deadline for this payer, recorded
- The 835 showing the denial
- Supporting documentation assembled
Know which track you’re on
1
Determine the payer type
Determine funding status before citing a state statute. A prompt-pay or external-review argument that doesn’t apply to a self-funded ERISA plan weakens an otherwise good appeal. See Payers vs insurance companies.
2
Confirm the deadline
Commercial deadlines are set by contract and vary widely — some are as short as 60 or 90 days from the remittance date. Medicare’s first level has its own statutory timeframe.Record every payer’s appeal deadline in your tracking grid when you sign the contract, not when you need it.
Medicare’s five levels
For Medicare fee-for-service, the appeals process has five sequential levels:1
Each level has its own filing deadline and, at levels 3 and 5, an amount-in-controversy threshold. Most provider appeals resolve at level 1 or 2. Confirm current deadlines and thresholds with CMS — the amount thresholds are adjusted.
Anatomy of an appeal letter
Four parts. Keep it to one or two pages.1. Identification
Patient name, member ID, claim number, dates of service, billed amount, denial date, and the specific CARC and RARC being appealed. Make it trivially easy for the reviewer to locate the claim.2. The facts
What was done, why, and by whom. Brief and factual. Two or three sentences.3. The argument
This is where appeals are won or lost. Cite something:4. The ask
State it plainly: reprocess and pay the claim at the contracted rate. Include your contact information and any required forms.Attachments
Only what supports the argument: the relevant chart notes, the authorization, the eligibility response, the submission proof, the policy excerpt. Apply minimum necessary — send what proves the point, not the entire record.Steps
1
Verify it's worth appealing
Consider the dollar amount, the likelihood of success, and whether it’s systematic. A 40 denial absolutely does, as one aggregated dispute.
2
Use the payer's required form and channel
Portal, mail, or fax. Using the wrong channel can mean the appeal is never logged.
3
Write the four-part letter with a policy citation
4
Submit before the deadline, and keep proof
Portal confirmation, certified mail receipt, or fax confirmation.
5
Log it
Payer, claim, denial reason, appeal date, level, deadline for the next level, outcome, and days to resolution.
6
Escalate to the next level if denied
Note the next deadline immediately — it runs from the denial of the prior level.
Track win rates
Appeal outcomes are management information:
A payer with a high overturn rate is denying claims it should have paid. That is a pattern worth raising in contract renegotiation, and in some states worth raising with the regulator.
Systematic denials get a different treatment
When the same denial recurs across many claims, don’t file dozens of individual appeals. Aggregate it: one letter identifying the pattern, the claim list, and the systematic cause, usually a payer configuration error or a policy misapplication. Payers correct configuration errors when shown the pattern, and the correction is retroactive across every affected claim.Verify it worked
- Payer funding status determined before choosing the argument
- Appeal deadline recorded for every payer contract
- Letters cite payer policy, LCD/NCD, or documentary evidence
- Correct form and channel used
- Submission proof retained
- Every appeal logged with outcome and days to resolution
- Win rates tracked by payer and reason
- Systematic denials aggregated rather than appealed individually
Common failure modes
Sources
- CMS, Medicare Parts A & B Appeals Process. Confirm current deadlines and amount-in-controversy thresholds.