Explore the legal complexities surrounding behavioral health and substance use patient care in emergency room settings through this comprehensive grand rounds presentation. Delve into crucial topics such as consent, law enforcement interactions, HIPAA regulations, and exceptions to patient privacy. Learn about the Tarasov Standard, continuity of care, court access, and handling mental health crises. Gain insights on managing immediate custody situations, controlling patient behavior, and addressing elopement risks. Examine EMTALA requirements, contraband handling, and policy-driven approaches to resisting testing. Enhance your understanding of the intricate legal landscape governing ER care for behavioral health and substance use patients.