Health Care Proxy
A Health Care Proxy names an agent and a successor agent (if desired) to make medical decisions for your when you are unable to make them yourself.
As long as the Health Care Proxy is signed while you have capacity, it can still be used after you lose capacity. A Health Care Proxy, combined with a Power of Attorney, can avoid the necessity of having a guardian appointed for you if you become incapacitated later in life.
You should make sure that your agent(s) named in your Health Care Proxy are willing to act in that capacity and are aware of your wishes in the event you are unable to make medical decisions for yourself.
A copy of your Health Care Proxy should be provided to your agent(s) and all of your medical providers to have in their files.