In this Article, I provide additional support for my recent proposal* to extend federal mental health parity law and mandatory mental health and substance use disorder benefits to all public healthcare program beneficiaries and private health plan members. I begin by examining health-related doctrine outside the context of mental health insurance law, including disability discrimination law, civil rights and human rights law, health information confidentiality law, healthcare reform law, and child and adult health and welfare law, and I find that not one of these laws provides inferior legal protections or benefits for individuals with mental illness. I also analyze international, national, state, and professional definitions of “health” ...