What is an underpayment appeal?
An underpayment appeal is a formal request asking a payer to reprocess a paid claim and pay the difference between what it paid and what the contract requires.
A strong appeal identifies the claim and service line, states the contracted rate and how it applies, shows the shortfall, and attaches supporting evidence such as the relevant contract terms or published rates. Payers set deadlines for appeals, so underpayments need to be found and appealed promptly.
Recovery often takes follow-up after the appeal is sent, until the payer pays or responds.
How Vareo helps
Vareo checks every line of your 835 remittances against your payer contracts, finds underpayments like this, and handles the appeals and follow-up. You pay only a share of what is recovered.
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Last updated October 11, 2026