This document is a report detailing the findings of the Optum 2024 Revenue Cycle Denials Index, which is based on an internal analysis of approximately 124 million hospital claim remits valued at $500 billion across over 1,400 U.S. hospitals. The report outlines the top national denial trends of 2023, highlighting that denials continue to cost health care systems millions of dollars annually. It presents a breakdown of denials by category, indicating that registration and eligibility issues account for the highest single source of denials at 24%. The report also discusses the factors contributing to high denial rates, including staffing challenges, inadequate access to data analysis, and a lack of investment in modern analytics. Additionally, it emphasizes the importance of understanding the root causes of denials to develop effective prevention strategies. The document encourages readers to download the accompanying e-Book for deeper insights into denial trends and prevention strategies.