A health care proxy is good for your entire lifetime once it is properly signed. There is no built-in expiration date, no renewal requirement, and no set number of years after which it stops working. The document stays in force until you die, revoke it, or an event like divorce or the loss of your named agent ends it. If you wrote an expiration date into the proxy yourself, that date controls, but almost no one does.
How Long the Document Actually Lasts
A proxy runs from the moment you sign it to the moment you die, unless you cancel it or replace it first. A proxy signed last month and one signed twenty years ago have identical legal standing. You never have to re-sign to keep it active.
You are allowed to build in an expiration date or a triggering condition. You could write that the proxy ends after ten years, or lapses if you move to another state. Few people do this, because a quietly expired proxy during a medical crisis defeats the purpose of having one. There is also a protective rule worth knowing: if your proxy carries an expiration date and that date arrives while you have already lost the ability to make your own decisions, most state laws prevent the proxy from expiring while you lack capacity. Your agent’s authority continues until you either recover or another legal process takes over.
When the Proxy Starts Working
Signing a proxy does not give your agent any immediate authority. Your agent can step in only after a physician determines that you have lost the ability to make or communicate your own medical decisions. Until that clinical finding is made, you remain fully in charge of your own care. This delayed trigger is sometimes called a springing power, because the authority springs into existence only when the medical situation demands it.
The capacity evaluation is a clinical judgment. A physician looks at whether you can understand your diagnosis and treatment options, weigh the risks and benefits, and communicate a consistent choice. If you can do those things, you still have capacity, even when others disagree with your choices. The determination and its basis get documented in your medical record.
If your condition improves and you regain the ability to make decisions, your agent’s authority pauses automatically. No court order is needed, and no new document. The proxy goes dormant again, ready to reactivate if you lose capacity in the future.
Events That End a Proxy Automatically
Indefinite does not mean indestructible. Several events can terminate a proxy on their own, without any action on your part.
Your Death
The proxy is a tool for making health care decisions during your life. The moment you die, your agent’s authority ends completely. A health care proxy gives no power over your estate, funeral arrangements, or organ donation unless your state’s law specifically extends the agent’s role to cover those post-death decisions. For everything else after death, you need a will or a separate designation.
Divorce or Legal Separation
If you named your spouse as your agent and the marriage later ends in divorce or legal separation, most states automatically revoke that appointment. The law assumes a former spouse may no longer be the right person to make intimate medical choices for you. In many jurisdictions, even filing for divorce is enough to trigger revocation. You can override this default by including an explicit statement in your proxy that you want your spouse to remain your agent regardless of marital status, but without that language, the appointment ends with the marriage.
Your Agent Is Unable or Unwilling to Serve
If your agent dies before you, becomes incapacitated, or refuses the role when the time comes, their authority ends. The document itself does not necessarily become invalid. If you named a successor agent, that person steps in automatically. If you did not name a backup and no valid proxy agent is available, most states have a default surrogate consent law that designates who can make medical decisions for you, typically following a priority list that starts with your spouse, then moves to adult children, parents, and other close relatives.
Naming at least one alternate agent is one of the simplest and most overlooked steps in the process. It costs nothing and prevents your medical care from falling to a court-appointed guardian or a statutory list that may not reflect your actual preferences.
How to Revoke or Replace Your Proxy
You can revoke your proxy at any time, as long as you have the mental capacity to do so. The law makes revocation deliberately easy because your right to control your own medical decisions is treated as fundamental. There are several ways to do it:
- Sign a new proxy. Executing a new health care proxy automatically replaces any earlier one. This is the cleanest method because you never leave a gap where no agent is appointed.
- Write a revocation statement. A signed written statement declaring that you are revoking the proxy works even if you are not naming a new agent.
- Revoke it orally. Telling your agent or your doctor that you are revoking the proxy is legally effective in most states. It works, but it creates an obvious proof problem if anyone later disputes what you said.
- Destroy the document. Tearing up or shredding the proxy can demonstrate your intent to revoke it, though copies may still exist elsewhere.
Whichever method you use, the most important follow-up is notification. Tell your former agent, any alternate agents, your doctors, and every health care facility that has a copy of the old document. A revoked proxy still sitting in a hospital’s file can easily be relied on during an emergency if nobody knows it has been cancelled.
When to Review a Proxy That Does Not Expire
Just because a proxy does not expire does not mean you should sign it once and forget about it. Life changes in ways that can make an old proxy a poor fit even when it remains technically valid.
Review your proxy after any major life event: marriage, divorce, the death of your named agent, a serious health diagnosis, a move to a new state, or a significant shift in your relationship with the person you chose. If your agent has moved far away or you have grown apart, they may not know your current values well enough to speak for you effectively.
Even without a triggering event, estate planning professionals generally recommend reviewing all advance directives every five years. The National Institute on Aging goes further and suggests talking with your agent at least once a year about your wishes.1National Institute on Aging. Choosing A Health Care Proxy That annual conversation does not require any paperwork. It keeps your agent current on how you feel about end-of-life care, aggressive treatment, and quality of life, so that if the proxy activates a decade from now, the person speaking for you still reflects who you are.
Does It Still Work If You Move or Travel
Most states explicitly recognize health care proxies created in other states, though the details vary. The usual approach is to honor an out-of-state proxy if it was valid where it was signed, or if it meets the requirements of the state where you are receiving care. In practice, hospitals rarely refuse to honor an out-of-state directive, but the risk is not zero.
If you split time between two states or relocate permanently, the safest move is to execute a new proxy that complies with your new state’s rules. Some states have unique witness or notarization requirements that your old document may not satisfy. A few minutes of preventive paperwork can save your family a great deal of stress during a medical crisis.
Federal law provides one universal exception. Military personnel can execute an advance directive under 10 U.S.C. ยง 1044c that explicitly preempts state law and is valid everywhere.
Why Proper Execution Still Matters
Duration is only meaningful if the document was properly created. A proxy that was never legally valid does not become valid with age, and a hospital may refuse to honor one that does not meet your state’s execution requirements. Rules vary by jurisdiction, but most states share a common core.
The proxy must be written, and you must sign it as a competent adult. In most states, you must be at least 18; a few set the threshold at 19. You must sign voluntarily and with a basic understanding of what the document does.
Nearly every state requires at least one adult witness to watch you sign or confirm that the document reflects your wishes. Witnesses generally cannot be the person you are appointing as your agent, and many states also bar your health care providers, employees of your care facility, and people who stand to inherit from you. Some states accept a single unrelated witness with no financial interest in your estate; others require two. A smaller number of states require notarization instead of, or in addition to, witnessing.
Because the specifics differ, use the advance directive form designed for your state. The National Institute on Aging recommends reading the directions on your state’s form closely to determine whether you need witnesses, notarization, or both.1National Institute on Aging. Choosing A Health Care Proxy A proxy that is good for life is only good if the signing was done right in the first place.