16/06/2026
Medical billing denials create serious problems for healthcare providers. Every denied claim delays payment and increases administrative work. In 2026, denials are rising due to AI-based audits.
When a claim is denied, providers incur more than $25 in manual rework per claim. Over time, these losses add up and hurt cash flow. The good news is that practices that focus on denial prevention can reach a first-pass claim acceptance rate of up to 96%.
This guide explains the top 10 denials in medical billing, ranked by frequency, using CO and PR denial codes and industry data.