Denial rate

Denial rate measures how often payers say no the first time. Count the claims a payer denied in full or in part on initial adjudication, divide by the claims submitted in the same period, and you have the initial denial rate by count. Run the same calculation on billed dollars and you have the rate by value, which usually tells a different story, because expensive services deny for different reasons than routine ones. Rejections are not denials. A claim the clearinghouse or payer front end refuses before adjudication never reached the payer’s system and belongs in a separate rejection rate.

The rate matters because each denial costs twice: the staff time to work it, and the risk that nobody works it at all. Tracked by payer, denial rate shows which plans are hard to bill. Tracked by CARC and remark code, it shows why: eligibility, authorization, coding, timely filing, duplicate claims, missing documentation. Tracked by provider or location, it exposes a credentialing or enrollment gap. The number on its own is only a temperature.

The mistake is counting only final denials, or only the ones someone chose to appeal. Capture the denial rate from the remittance at posting, before anyone decides whether a denial is worth fighting, and include partial denials where one line denied and the rest paid. Pair it with the overturn rate on appeals and the time between denial and resubmission, so you can see both how many claims deny and how many of them you win back.