Domain 12.2Medical Law and Ethics

Advance Directives Decision Making

Last updated June 16, 2026

Overview

This guide covers Advance Directives and Legal Authority. As a Medical Assistant, you are often the link between the patient and the provider. Understanding who has the legal right to make healthcare decisions—and the documents that grant that right—is crucial. This relates directly to patient autonomy (the right to self-rule).

Mistakes in this area can lead to serious legal issues. This guide breaks down the essential documents (Living Wills, DNRs) and the people empowered to use them (Proxies, Guardians).

1. Core Concepts: What Are Advance Directives?

An Advance Directive is a legal document that allows a person to spell out their decisions about end-of-life care ahead of time. They are created when a patient is competent, but they only go into effect if the patient becomes incapacitated—meaning they are unable to communicate their own wishes (e.g., coma, advanced dementia).

2. The Documents: Stating the "What"

These documents focus on the specific treatments a patient wants or refuses.

A. Living Will

A Living Will is a written, legal document that details the types of medical treatments a person does or does not want to receive at the end of life.

  • What it does: It states a person's wishes regarding specific life-sustaining treatments.
  • Examples of treatments addressed: Mechanical ventilation, tube feeding, dialysis, and palliative care.
  • Key Feature: A Living Will is about WHAT treatments are desired, not WHO makes the decisions.

Memory Aid: A Living Will lets your wishes live on after you are no longer able to communicate them.

B. Do-Not-Resuscitate (DNR) Order

A DNR Order is a specific medical order written by a physician in a patient's chart. It is not an advance directive created by the patient, though it is based on the patient's wishes.

  • What it does: It instructs the healthcare team not to perform cardiopulmonary resuscitation (CPR) if the patient's heart or breathing stops.
  • Also seen as: DNI (Do-Not-Intubate).

Exam Tip: If a question asks for the formal medical order to withhold CPR, the answer is DNR. If it asks for the document stating a patient's wishes, it is more likely a Living Will.

C. MOLST/POLST

Medical Orders for Life-Sustaining Treatment. These are medical orders for patients with serious, advanced illness that travel with the patient across care settings (e.g., home to hospital). They convert wishes into actionable medical instructions.

3. The People: Establishing the "Who"

When a patient cannot make decisions, a specific person must be legally authorized to step in.

A. Health Care Proxy / Durable Power of Attorney for Health Care (DPOAHC)

This is one of the most important concepts for the exam.

  • What it is: A legal document in which a competent patient (the "principal") appoints a specific person (known as a health care agent, proxy, or attorney-in-fact) to make medical decisions for them if they become incapacitated.
  • Key Features:
    • Chosen by the Patient: The agent is chosen by the patient in advance.
    • "Durable": The document remains in effect (or endures) even after the patient becomes incapacitated.
    • Health Care Specific: This is separate from a financial Power of Attorney.

🧠 Memory Aid: A durable Power of Attorney gives a specific person the legal power to make healthcare decisions for you.

B. Legal Guardian

  • What it is: A person appointed by a court to be responsible for another person's care.
  • Key Difference: A guardian is court-appointed, whereas a health care agent (DPOA) is patient-appointed.

C. Health Care Surrogate (Next of Kin)

  • What it is: If a patient is incapacitated and has neither a DPOAHC nor a guardian, state laws provide a hierarchy of family members (Spouse > Adult Child > Parent) who can act as a surrogate.

4. Comparison: Living Will vs. DPOAHC

Students often confuse these two. Remember: WHO vs. WHAT.

Document WHO has Authority? WHAT are the Instructions? Primary Function
Durable Power of Attorney for Health Care (DPOAHC) YES - Appoints a specific person (agent/proxy) to make decisions. NO - The document's main purpose is to name the decision-maker, not list specific treatments. Designates WHO decides.
Living Will NO - Does not appoint a person. YES - Details the patient's wishes for specific medical treatments (e.g., "no ventilator"). States WHAT the patient wants.

High-Yield Fact: A DPOAHC is often considered more flexible than a living will because the appointed agent can make decisions about unforeseen medical situations.

5. Legal Authority for Minors

A. The General Rule: Parental Consent

For patients under the age of majority (usually 18), a parent or legal guardian must provide consent for medical treatment.

B. The Key Exception: The Emancipated Minor

  • What it is: A person younger than the age of majority who has been legally freed from parental control by a court (e.g., due to marriage, military service, or financial independence).
  • Impact on Health Care: An emancipated minor has the full legal rights of an adult. They can consent to or refuse their own medical treatment and are responsible for their own bills.

6. The Legal Framework and the MA's Role

The Patient Self-Determination Act (PSDA)

This federal law requires healthcare facilities receiving Medicare/Medicaid payments to:

  1. Inform patients of their right to make healthcare decisions.
  2. Ask patients if they have an advance directive.
  3. Document the existence of an advance directive in the record.

Your Role as a Medical Assistant

  • DO: Ask if the patient has an advance directive, document it, and notify the provider.
  • DO NOT: Give legal/medical advice, interpret the document, or witness the signature (avoids conflict of interest).

7. Final Key Takeaways

  • Living Will = WISHES (What treatments to give/withhold).
  • DPOA/Proxy = PERSON (Who makes the decisions).
  • DNR = MEDICAL ORDER (Doctor's order to withhold CPR).
  • Emancipated Minor = Treated as an adult; can sign their own consent.
  • PSDA = The law requiring facilities to ask about advance directives.
  • MA Role = Recognize, document, and facilitate. Never advise.