Claim Denial

What is a claim denial?

A claim denial is a payer's refusal to pay a submitted claim. Denials differ from rejections: a rejection never enters the payer's system because of a formatting or data error, while a denial is processed and then refused for a stated reason. Denials are reported on the remittance advice with a reason code. Most are reversible on appeal, and most small practices never appeal them.

The reasons that account for most denials

A handful of causes dominate: eligibility lapsed, prior authorization missing, service deemed not medically necessary, coding mismatch between procedure and diagnosis, duplicate submission, and timely filing exceeded. Front-desk verification prevents the eligibility and authorization categories outright, which is where the largest share sits. Coding denials point to documentation or training gaps rather than billing errors.

Working denials instead of writing them off

Set a threshold where every denial gets reviewed rather than absorbed, and track your denial rate as a percentage of claims submitted. Appeal deadlines are short, often 30 to 90 days, so a denial sitting unworked for a month may already be dead. Categorize denials by reason code monthly to see which are process failures you can fix upstream. A practice writing off denials silently is leaving real collected revenue on the table.