In Arizona, your medical care isn't just about what you want—it’s about having the right paperwork to make sure those wishes are legally enforceable. As of 2026, Arizona has a standardized "Life Care Planning" system that allows every adult to stay in the driver's seat of their own medical treatment. Here is the breakdown of the essential directives you should have in your file. 1. Health Care Power of Attorney (HCPOA) This is the most important document in your medical kit.