Healthcare Proxy vs. Medical Power of Attorney — What's the Difference?
Powers of Attorney

Healthcare Proxy vs. Medical Power of Attorney — What's the Difference?

9 min read

Key Points

  • Healthcare proxy and medical power of attorney are different names for the same type of document — a legal instrument that designates a person to make medical decisions for you if you are unable to make them yourself. The name your state uses depends on where you live; the function is identical.
  • A living will and a healthcare proxy serve different purposes and work best together. A living will states your wishes about specific medical treatments in advance. A healthcare proxy appoints a person to interpret and apply your wishes in situations a written document cannot fully anticipate — giving you both documented preferences and a trusted human decision-maker.
  • Without a healthcare proxy or medical power of attorney, no one has automatic legal authority to make medical decisions for you if you become incapacitated — not your spouse, not your adult children. Hospitals and providers must follow their own protocols, which may not reflect your wishes, until a court appoints a guardian.

The Terminology Problem

If you have looked into advance healthcare planning, you have probably encountered a confusing array of terms: healthcare proxy, medical power of attorney, healthcare power of attorney, durable power of attorney for healthcare, advance directive, living will, POLST, MOLST. The terms overlap, differ by state, and are often used interchangeably — even by healthcare providers.

Here is the short answer: in most states, “healthcare proxy” and “medical power of attorney” refer to the same type of document.1 Both designate a person — called your healthcare agent, healthcare proxy, or surrogate — to make medical decisions on your behalf if you are unable to make them yourself. The different name is simply a matter of what your state calls it.2

Understanding the terminology is the first step. Understanding what the document actually does — and what happens without it — is what matters most.

What a Healthcare Proxy or Medical POA Actually Does

A healthcare proxy (or medical power of attorney) is a legal document that authorizes a specific person to make healthcare decisions for you when you cannot make them yourself.1 This typically applies when you are unconscious, under anesthesia, or otherwise mentally incapacitated due to illness, injury, or the progression of a serious medical condition.

Your agent has the authority to:

  • Consent to or refuse medical treatments on your behalf
  • Choose among different treatment options
  • Select and change your healthcare providers and facilities
  • Access your medical records (HIPAA authorization is often included in the document)3
  • Communicate your wishes to your medical team
  • Make decisions about surgery, hospitalization, rehabilitation, and long-term care
  • In most states, make end-of-life decisions including the withdrawal of life-sustaining treatment, if you have granted that authority

Your agent is legally required to act in accordance with your known wishes. If your wishes are not known, they should act in your best interest. This is why conversations with your agent — before you need the document — are just as important as the document itself.

Healthcare Proxy vs. Medical POA: State Name Differences

The terminology varies significantly by state:2

  • Healthcare proxy is the term used in New York, Massachusetts, and several other northeastern states
  • Medical power of attorney or durable power of attorney for healthcare is the term used in Texas, California, and many other states
  • Healthcare representative or healthcare surrogate appears in other states

In all cases, the core legal function is the same: you are designating a person to be your decision-maker when you cannot speak for yourself. If you move to a different state, your document may still be honored — many states have reciprocity provisions — but it is worth reviewing your documents with an attorney in your new state to confirm.

Healthcare Proxy vs. Living Will: Two Different Documents

A healthcare proxy and a living will are often confused, but they are distinct documents that serve different purposes and work best when used together.4

A living will (also called a directive to physicians or advance directive, depending on your state2) is a written statement of your preferences about specific medical treatments. Common examples include whether you want CPR, mechanical ventilation, artificial nutrition and hydration, or other life-sustaining interventions if you are in a terminal condition or a permanent vegetative state.5

A living will speaks for you directly but has inherent limitations: it is written in advance, without knowing exactly what medical situation will arise. Real medical decisions are often more nuanced than a written document can capture.

A healthcare proxy addresses this limitation by appointing a person who can interpret your wishes and apply them to specific circumstances. Your agent can ask questions, consult with physicians, and make judgment calls that no written document could fully anticipate.

The two documents complement each other. A living will gives your agent documented guidance and reduces the burden on them to guess what you would want. A healthcare proxy gives you a trusted human decision-maker who can fill in the gaps your living will does not address.

Most estate planning attorneys recommend having both.

POLST and MOLST: For People with Serious Illness

If you or a family member has a serious, advanced illness, you may encounter additional documents called POLST (Physician Orders for Life-Sustaining Treatment) or MOLST (Medical Orders for Life-Sustaining Treatment), depending on your state.6

Unlike a living will or healthcare proxy — which are legal documents executed by patients — a POLST or MOLST is a medical order signed by a physician.6 It translates your wishes about life-sustaining treatment into specific actionable orders that emergency responders and other healthcare providers are required to follow. The medical order form typically includes orders regarding CPR status, medical interventions, antibiotics, and medically administered nutrition and hydration.7

A POLST is not a substitute for a healthcare proxy. It is a companion document used when someone has a serious illness and needs their treatment preferences immediately enforceable — in an emergency room, a nursing home, or even at home. It is typically completed in consultation with a physician as part of serious illness planning.

Each state has its own variation of the POLST, which may go by different names and cover somewhat different directives.6 If you are generally healthy, a POLST is not something you need. A living will and healthcare proxy are the right tools. A POLST becomes relevant when you are managing a terminal diagnosis or advanced chronic illness.

What Happens Without a Healthcare Proxy

This is the point most people do not fully appreciate: without a healthcare proxy or medical power of attorney, no one has automatic legal authority to make medical decisions for you if you become incapacitated.1

Not your spouse. In most states, a spouse has no automatic authority to consent to your medical treatment unless they have been specifically designated in a healthcare proxy or appointed by a court.

Not your adult children. Adult children have no special standing to direct your medical care without legal documentation.

Not your parents. If you are an adult — even if you are 18 years old and still living at home — your parents lost automatic medical decision-making authority when you turned 18.8

In the absence of a healthcare proxy, hospitals and healthcare providers will fall back on their own protocols, which typically involve a hierarchy of next-of-kin. These protocols are informal and often legally uncertain. For significant decisions — particularly end-of-life decisions — providers may require court authorization, meaning a judge would need to appoint a guardian before certain decisions can be made.

Court guardianship takes time and money at exactly the moment when your family is already under enormous stress. And the person a court appoints may not be who you would have chosen.

How to Create a Healthcare Proxy or Medical POA

The process is straightforward:

  1. Choose your healthcare agent. Pick someone you trust deeply, who understands your values and wishes, and who will advocate for you — sometimes against hospital staff or other family members. Designate an alternate in case your first choice is unavailable.

  2. Have the hard conversations. Tell your agent your values and preferences about medical treatment. Talk about quality of life versus quantity of life. Discuss specific scenarios — what would you want if you had a serious stroke with little chance of recovery? These conversations are uncomfortable but essential.

  3. Execute the document properly. Requirements vary by state but typically involve signing the document in front of witnesses and, in many states, a notary.2 Your state’s department of health or bar association usually publishes standard forms. Most states provide the forms for free, and you can complete them without involving a lawyer.1

  4. Distribute copies. Give your agent a copy. Give your primary care physician a copy for your medical record. If you are hospitalized, bring a copy with you.

  5. Review periodically. Your agent should still be the right person. Relationships change. Review your healthcare proxy after major life events — marriage, divorce, the death of a named agent.

How a Healthcare Proxy Fits Into Your Overall Estate Plan

A healthcare proxy is one component of a complete set of advance directives and estate planning documents. The full picture typically includes:

  • A will, which directs the distribution of your assets after death
  • A durable financial power of attorney, which authorizes an agent to manage your finances if you become incapacitated
  • A healthcare proxy or medical power of attorney, which authorizes an agent to make medical decisions if you become incapacitated
  • A living will, which documents your treatment preferences
  • Beneficiary designations, which ensure your accounts and policies transfer directly to the right people

None of these documents are optional if you want to protect yourself and reduce the burden on your family. The healthcare proxy is arguably the most urgent of all — because unlike your will, which only matters after you die, a healthcare proxy can matter any day, at any age, starting the moment you sign it.

References

  1. Advance Care Planning: Advance Directives for Health Care - National Institute on Aging (NIH), accessed June 2026, https://www.nia.nih.gov/health/advance-care-planning/advance-care-planning-advance-directives-health-care
  2. Advance Directive - Cornell Law School Legal Information Institute (Wex), accessed June 2026, https://www.law.cornell.edu/wex/advance_directive
  3. Does Having a Health Care Power of Attorney Allow Access to Medical and Mental Health Records Under HIPAA? - HHS.gov, accessed June 2026, https://www.hhs.gov/hipaa/for-professionals/faq/3000/does-having-health-care-power-attorney-allow-access-patients-medical-mental-health-records-under-hipaa/index.html
  4. Health Care Agents - MedlinePlus Medical Encyclopedia, accessed June 2026, https://medlineplus.gov/ency/patientinstructions/000469.htm
  5. Preparing a Living Will - National Institute on Aging (NIH), accessed June 2026, https://www.nia.nih.gov/health/advance-care-planning/preparing-living-will
  6. Advance Directives - StatPearls - NCBI Bookshelf (NIH), accessed June 2026, https://www.ncbi.nlm.nih.gov/books/NBK459133/
  7. Use of the Physician Orders for Life-Sustaining Treatment (POLST) Paradigm Program in the Hospice Setting - PMC/NIH, accessed June 2026, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2966836/
  8. Four Important Legal Documents to Have When Your Child Turns 18 - Nolo, accessed June 2026, https://www.nolo.com/legal-encyclopedia/three-important-steps-to-take-when-your-child-turns-18.html
  9. Choosing a Health Care Proxy - National Institute on Aging (NIH), accessed June 2026, https://www.nia.nih.gov/health/advance-care-planning/choosing-health-care-proxy
  10. Personal Representatives and HIPAA - HHS.gov, accessed June 2026, https://www.hhs.gov/hipaa/for-professionals/privacy/guidance/personal-representatives/index.html
  11. Health Care Directive - Cornell Law School Legal Information Institute (Wex), accessed June 2026, https://www.law.cornell.edu/wex/health_care_directive
  12. Advance Directives: MedlinePlus, accessed June 2026, https://medlineplus.gov/advancedirectives.html

Related Guides

What Is a Power of Attorney? A Complete Guide

What Is a Power of Attorney? A Complete Guide

A power of attorney is one of the most important documents you can have — it lets someone you trust manage your finances or healthcare if you become incapacitated. This guide explains every type of power of attorney, what an agent can and cannot do, and what happens if you become incapacitated without one.

Read Guide
Special Needs Trust: What It Is and Why It Matters

Special Needs Trust: What It Is and Why It Matters

A special needs trust is a legal arrangement that allows you to leave money for a loved one with a disability without disqualifying them from Medicaid, SSI, and other government benefits they depend on. This guide explains how special needs trusts work, when you need one, and why getting the structure right requires a specialized attorney.

Read Guide
Navigating Your Role: A Guide for Adult Children Assisting Aging Parents with Finances and Health

Navigating Your Role: A Guide for Adult Children Assisting Aging Parents with Finances and Health

Navigate the complexities of supporting your aging parents with confidence! This paper provides adult children with the practical strategies and legal insights needed to have crucial conversations and make informed decisions about their parents' finances and healthcare.

Read Guide