Advance directive is an umbrella term for documents that allow you to plan for future medical decisions in case you are unable to make or communicate those decisions yourself.

Two of the most important pieces of advance planning are:

A living will
Puts your wishes and preferences for medical care in writing.

A health care proxy / medical power of attorney document
Names another person to make health care decisions for you if you cannot make them yourself.

Depending on the state and the form being used, these may be separate documents or combined into a single advance health care directive.

This terminology can be confusing because the same or similar words are sometimes used differently. For example, “health care proxy” may refer to the person you appoint, while a health care proxy form is the document you use to appoint that person.

And advance directives are specifically about health care. They do not give someone authority over your finances, distribute your property after death, or replace financial powers of attorney, wills, or trusts.

Think of an advance directive as the category: one part communicates your wishes; another identifies who can speak for you.

A living will is a legal document that describes the medical care you would or would not want if you could no longer make or communicate those decisions yourself.

It can provide guidance about things such as:

• life-sustaining treatments, including ventilation, artificial nutrition and hydration, or dialysis

• CPR and resuscitation preferences

• comfort-focused or palliative care

• the circumstances in which you would want particular preferences to apply

• other wishes related to serious illness, injury, or loss of decision-making capacity

But a living will does more than create a list of “yes” and “no” treatments. It can help your decision-maker and medical team understand how your preferences relate to your larger values—comfort, independence, longevity, connection with others, or whatever matters most to you.

A Living Will Is Not a Last Will & Testament

This distinction deserves to be conspicuous.

Despite the shared word will, these are completely different documents.

A living will addresses health care decisions during your lifetime if you cannot communicate your wishes.

A last will and testament addresses matters after your death, such as distribution of property and assets, naming an executor, and potentially guardianship of minor children.

A living will also does not automatically create a medical order such as a DNR. We'll get to that distinction below.

This is where I think we should explicitly acknowledge the language problem rather than pretending it doesn't exist.

A health care proxy commonly means the person you choose to make health care decisions for you if you cannot make them yourself.

But you'll also encounter terms such as:

• health care agent

• health care representative

• medical power of attorney

• durable power of attorney for health care

And confusingly, “health care proxy” can also be used to describe the legal document that names that person. The terminology varies by state.

The important distinction is between:

The person: the individual you've chosen to make decisions.

The document: the legal instrument that formally gives that person authority.

This is why the work you did in the previous roadmap step, choosing the right person and talking with them, is separate from completing the paperwork. The document gives someone authority; your conversations and written wishes help them know how you want that authority used.

I'd then have a small state-specific note/link here rather than trying to explain all 50 states.

A HIPAA authorization or release allows health care providers to share protected medical information with the people you designate.

This is another distinction that's easy to miss:

Being allowed to receive information is not the same as being allowed to make decisions.

You might want an adult child, sibling, caregiver, or other trusted person to speak with your doctors, receive updates, or help coordinate appointments even though someone else is your legally designated health care proxy.

That brings us back to the different roles from the previous section: your proxy, medical team, and care connectors don't necessarily need the same authority—but they may need to communicate with one another.

Some medical decisions require something different from an advance directive: an actual medical order.

A living will can express what you would want. A medical order tells health care professionals what to do in a specific clinical situation.

DNR — Do Not Resuscitate
Directs that CPR not be attempted if your heart stops.

DNI — Do Not Intubate
Directs that intubation/mechanical ventilation not be used if you stop breathing or cannot breathe adequately.

A DNR or DNI applies to those specific interventions. It does not mean “do not treat.” Other appropriate medical treatment can still be provided.

POLST / MOLST — Orders for Life-Sustaining Treatment
These forms address a broader range of treatment decisions and are generally intended for people with serious illness, advanced frailty, or complex medical needs. They are completed with a clinician and are designed to translate current treatment wishes into actionable medical orders that can follow someone across care settings.

These documents aren't something every healthy adult needs simply because they're planning ahead. They become relevant when someone's health circumstances make these treatment decisions more immediate.