A Massachusetts health care proxy is a document by which 1 individual (the principal) appoints another (the health care agent) to make health care decisions for him or her should he or she be unable to make or communicate such decisions for himself or herself. The health care agent can even make decisions concerning the use or terminating the use of life support systems. Again, this is extremely important if you become incompetent.
These documents are needed not just for the elderly or infirm. There is no way to predict when an accident might happen or when such a document will be needed. Both are recommended as an important part of every estate plan.