Which of the following is NOT a function of advance directives?

Advance directives are legal documents that allow individuals to communicate their healthcare preferences and decisions in the event that they are unable to do so themselves. These directives primarily serve several important functions related to medical care.

Specifying healthcare preferences is a central function, as it allows individuals to outline their wishes regarding medical treatments and interventions, ensuring that their choices are honored when they cannot voice them directly. Additionally, appointing a decision-maker, often referred to as a healthcare proxy or durable power of attorney for healthcare, is another critical role of advance directives, empowering someone trusted to make decisions on the patient's behalf.

Another key function is stating wishes for life-sustaining treatment, which addresses the type of care individuals want or do not want at the end of life, such as resuscitation or artificial nutrition and hydration.

In contrast, providing insurance information is not a function of advance directives. While having an understanding of one’s insurance may be beneficial for overall healthcare planning, it does not directly relate to the purpose of advance directives, which focus solely on expressing personal healthcare choices and preferences.