This document is a guide detailing the InterQual Procedures Criteria, which aims to assist payers and providers in making informed decisions regarding the appropriateness of surgical and invasive procedures. It provides evidence-based clinical tools to improve quality, reduce costs, and support documentation of medical appropriateness. The guide outlines features such as a Q&A format for user-friendly experience, comprehensive criteria covering over 500 procedures, and a streamlined review process that identifies urgent conditions. It also includes guidance on conservative treatments, setting of care, and length of stay benchmarks. The document emphasizes the importance of objective and specific clinical content, developed through a rigorous evidence-based process and extensive peer review. InterQual is utilized by numerous provider and payer organizations, ensuring consistent and defensible decisions in patient care across various medical specialties.