Mental health evaluation is an essential part of behavioral health care. The client undergoes interviews and tests so the behavioral health professional can gain a clearer picture of what they're going through, their diagnosis, the possible causes, and the types of interventions the client can benefit from. While they generally have the same goal, evaluations may differ from one person to another since the tests measure different factors and are provided based on the client's experience and issues. As a byproduct of evaluations, a diagnosis can help professionals create a customized treatment plan for each client, which will be used as a guide in succeeding treatment sessions.