A medical power of attorney gives one person the legal authority to make health decisions for you if you cannot
A medical power of attorney is a document that names someone to decide your medical care when you are unable to do so yourself. That person—called your agent, attorney-in-fact, or healthcare proxy—can consent to or refuse treatment, choose hospitals and doctors, and access your medical records. They act only when you cannot make decisions, either temporarily (during surgery recovery) or permanently (due to dementia or coma). The document takes effect on a date you choose or when ready, depending on how you write it.
This is different from a living will, which states what treatments you want or do not want. A medical power of attorney gives someone the power to interpret your wishes and make new decisions as situations change. It is also different from a general power of attorney, which covers money and property, not health care.
Key Takeaways
- Your agent can make any medical decision you could make yourself—including refusing life support—but only when you are unable to decide.
- The document must be signed, witnessed, and often notarized according to your state's rules, which vary significantly.
- You can name a backup agent in case your first choice is unavailable or unwilling to serve.
- You remain in control as long as you are able to make decisions; your agent's power does not override yours.
- Your agent has a legal duty to follow your known wishes and act in your best interest, even if they disagree with your choices.
What decisions your agent can and cannot make
Your agent can consent to surgery, hospitalization, medication, blood transfusions, and diagnostic tests. They can choose which doctor or hospital to use, request or refuse life-sustaining treatment like ventilators or feeding tubes, and access your medical records and test results. They can also decide where you receive care—at home, in a hospital, or in a nursing facility.
What your agent cannot do depends on your state and how you write the document. Most states prohibit agents from making decisions about organ donation, psychiatric commitment, or abortion without explicit permission in the document. Some states also restrict decisions about do-not-resuscitate (DNR) orders or withholding food and water. Check your state's specific rules before signing, because restrictions vary widely.
Your agent cannot use the power of attorney to benefit themselves financially, change your will, or make decisions after you die. They also cannot override a valid living will or other advance directive you have already signed.
How to create a medical power of attorney in your state
Each state has its own form and rules. Some states provide a standard form online through the state bar association, the secretary of state's office, or the state health department. Others allow you to write your own as long as it meets state requirements. The safest approach is to use your state's official form or have an attorney draft one, because a document that does not follow state law may be rejected by hospitals and doctors.
You must sign the document in front of witnesses—usually two, though some states require one. Many states also require a notary public to sign and stamp the document. Some states allow a doctor or hospital employee to witness; others prohibit it. A few states have different rules if you are in a hospital or nursing home when you sign. Look up your state's specific witnessing requirements before you gather people to sign, because mistakes can make the document invalid.
After signing, keep the original in a safe place and give copies to your agent, your doctor, and your hospital. Some people keep a copy in a safe deposit box, though hospitals may not be able to access it in an emergency. Tell your agent where to find the original and make sure they understand your wishes before they ever need to use it.
Choosing the right person to be your agent
Your agent should be someone you trust completely, because they will have access to private medical information and the power to make life-or-death decisions. They should understand your values about medical care and be willing to follow your wishes even if they disagree. They also need to be available and willing to take on the responsibility—do not assume someone will accept without asking first.
Many people choose a spouse, adult child, or close friend. Some choose a professional, like an elder law attorney or a trusted counselor. You can name more than one agent if you want, though most people name one primary agent and one or two backups in case the first is unavailable. If you name multiple agents to act together, they must all agree on every decision, which can slow things down in an emergency.
Avoid naming someone who lives far away, has a history of not following through on commitments, or has a conflict of interest—for example, someone who stands to inherit from you or who has a grudge against your family. Your agent will be making decisions under stress, so choose someone calm and able to communicate with doctors and family members.
When your agent's power begins and ends
You decide when the document takes effect. A springing power of attorney becomes active only when a doctor says you cannot make decisions—for example, after a stroke or diagnosis of dementia. An when ready power of attorney takes effect as soon as you sign it, even though you are still able to make decisions. Many people choose when ready because it avoids delays if you suddenly become unable to decide, but it means your agent could theoretically act without your knowledge while you are still competent.
Your agent's power ends when you die, when you revoke the document in writing, or when you regain the ability to make decisions. If you recover from a temporary condition like surgery recovery, you can take back control when ready. You can also change your agent or cancel the document at any time while you are able to make decisions. Put any revocation in writing and notify your agent, doctor, and hospital.
Your agent's legal responsibilities and limits
Your agent has a legal duty called fiduciary responsibility, which means they must act in your best interest and follow your known wishes. If you told them you do not want life support, they cannot authorize it just because they think you should live longer. If you told them you want everything done to keep you alive, they cannot refuse treatment because it is expensive or burdensome. They must also keep your medical information private and cannot share it except with doctors and family members who need to know.
Your agent cannot be paid for making medical decisions, though they can be reimbursed for expenses like travel to medical appointments. If they abuse their power—for example, by authorizing unnecessary treatment to hasten your death or by stealing from your estate—they can be sued and removed. Hospitals and doctors can also refuse to follow an agent's decision if they believe it violates the law or their ethical standards, though this is rare.
How hospitals and doctors use the medical power of attorney
When you arrive at a hospital unable to make decisions, staff will ask if you have a medical power of attorney. Your agent should present the original or a certified copy. The hospital will keep a copy in your medical record and use it to determine who can make decisions about your care. If your agent is not present, the hospital may contact them by phone, though they will usually ask for the document first.
Doctors are not required to follow your agent's decision if they believe it is medically inappropriate or violates the law. For example, a doctor can refuse to stop life support if they believe you could recover, though they must usually offer to transfer you to another doctor or facility. In practice, most doctors and agents work together without conflict, especially if you have a living will that clarifies your wishes.
If a hospital or doctor refuses to honor your agent's decision and you disagree, your agent can request a hospital ethics committee review or contact a patient advocate. In rare cases, your agent may need to go to court, though this is expensive and time-consuming.
Frequently Asked Questions
Can I change my mind about who my agent is?
Yes. You can revoke the medical power of attorney at any time while you are able to make decisions. Put the revocation in writing, sign it, and give copies to your agent, doctor, and hospital. You can then sign a new document naming a different agent. Make sure the old document is destroyed or clearly marked as revoked so there is no confusion.
What happens if my agent is not available when I need them?
That is why you should name backup agents in the document. If your first agent cannot be reached or is unwilling to serve, the hospital will contact your second choice. If no agent is available, the hospital will follow your living will or ask a family member to make decisions, depending on your state's laws.
Does my agent have to follow my living will?
Yes. Your agent must follow any written instructions you left in a living will or advance directive. If your living will says no life support and your agent tries to authorize it, the living will takes priority. Your agent's job is to interpret and carry out your wishes, not to override them.
Can my agent make decisions about money or property?
No. A medical power of attorney covers only health care decisions. If you want someone to manage your money or property when you cannot, you need a separate financial power of attorney or durable power of attorney.
What if my family disagrees with what my agent decides?
Your agent's decision is legally binding, not your family's opinion. However, your agent should try to explain your wishes to your family and listen to their concerns. If family members believe your agent is not following your known wishes, they can request a hospital ethics committee review or, in extreme cases, ask a court to remove your agent.