What to include in an appeal letter for a denied claim
An effective appeal letter identifies the claim precisely, states the request in one sentence, rebuts the payer's stated denial reason with attached evidence, and closes with the signature of someone authorized to speak for the practice. Letters that win make the reviewer's job easy.
What identifying details does the letter need?
The patient's member ID, the claim number from the remittance, the date of service, the billed service, and the denial code you are appealing. Missing identifiers are among the most common reasons an appeal is returned unprocessed.
How should the letter be structured?
State the request first: which claim, which denial, and what you want the payer to do. Then answer the payer's stated reason directly — one argument per paragraph — and list the attached evidence. Close with contact details and a signature.
What evidence should be attached?
Whatever answers the payer's stated reason. A timely-filing appeal attaches submission proof; a medical necessity appeal attaches the clinical record and the payer's own coverage policy; an authorization appeal attaches the authorization record. Always include the remittance showing the denial.
What gets appeal letters rejected?
Arguing something other than the payer's stated denial reason, sending the letter to the wrong address or portal, missing the filing deadline, leaving out claim identifiers, and sending it unsigned. Every one of these is avoidable with a checklist.