This document is about a tool to help participants, enrollees, or their authorized representatives request information from their health plan or insurer regarding limitations that may affect their access to mental health or substance use disorder benefits. It provides instructions, background information on the Mental Health Parity and Addiction Equity Act (MHPAEA), and a form to request general information or information related to a specific denial of benefits. The document outlines the types of information that can be requested, such as the factors and evidentiary standards used to develop the limitation, as well as evidence that the limitation is applied no more stringently to mental health and substance use disorder benefits than to medical and surgical benefits.