We all read the same coding guidelines, yet Modifier 25 remains one of the most debated topics in medical coding. Why do coders, auditors, providers, and payers often reach different conclusions when reviewing the same encounter? This session explores the history of Modifier 25, the guidance used to support its application, and the areas that generate the most disagreement in practice. Through real-world examples, attendees will gain a deeper understanding of why these differences exist and leave with a practical framework for achieving greater consistency, confidence, and defensibility in their coding decisions.