This document is about a guidance compendium on the Mental Health Parity and Addiction Equity Act (MHPAEA) enforcement. It provides citations to the MHPAEA rules and the guidance issued by the Departments of Labor, Health and Human Services, and the Treasury on various aspects of MHPAEA compliance, including benefits in all classifications, annual and lifetime dollar limits, financial and quantitative treatment limitations, non-quantitative treatment limitations, disclosures, and enforcement and implementation. The document is intended to be a reference for the categories of MHPAEA violations cited in the Departments' annual enforcement fact sheet.