Skip to main content
New Mexico Advance Health-Care Directive
Support GuideNew Mexico13 min read

New Mexico Advance Health-Care Directive

How a New Mexico advance directive works: one document for your wishes plus a health-care agent, no required witnesses, the surrogate list, and when it takes effect.

By Settled Editorial

In New Mexico you do not need separate paperwork for a living will and a medical power of attorney. One document, called an advance health-care directive, can do both. It can write down the care you want, and it can name a health-care agent to speak for you when you cannot speak for yourself. New Mexico also keeps the signing rules light: a written directive must be in writing and signed by you, and the statute does not require witnesses or a notary. This sits under the New Mexico Uniform Health-Care Decisions Act, NMSA 1978, Chapter 24, Article 7A. (See NMSA 1978, Section 24-7A-2.)

Use this New Mexico advance directive guide as a planning map, not as legal advice or a finished form. The exact wording you need depends on your health, your family, and your wishes. A New Mexico estate-planning attorney can help you sign a directive that says what you mean. This page connects to the New Mexico probate help hub and to the New Mexico power of attorney guide for the money side of planning.

What a New Mexico Advance Directive Does

A New Mexico advance health-care directive is one written document that can carry two kinds of choices. The Uniform Health-Care Decisions Act defines the directive as an individual instruction or a power of attorney for health care, and the same document can do both. (See NMSA 1978, Section 24-7A-1.)

  • Living-will instructions. You can write down the care you do and do not want, including end-of-life care, artificial nutrition and hydration, pain relief, and an anatomical gift of your organs. New Mexico calls this an "individual instruction." There is no stand-alone living will statute in New Mexico, so those wishes live inside the advance directive. (See NMSA 1978, Section 24-7A-2(A).)
  • A health-care agent. You can name an adult you trust to make medical decisions for you, consent to or refuse treatment, and see your medical records when you cannot decide for yourself. This is New Mexico's version of a medical power of attorney. You can also name first and second alternate agents as backups. (See NMSA 1978, Section 24-7A-2(B).)

You do not have to use both parts. Some people only name an agent. Some only write instructions. Many do both in one signed document. A written directive can also nominate a guardian of the person if a court ever needs to appoint one. (See NMSA 1978, Section 24-7A-2(G).)

One naming note that confuses people: New Mexico does not have a separate "health-care surrogate" document you fill out in advance. The agent you name is your chosen decision-maker. A surrogate in New Mexico law is the person who steps in by default when there is no agent, which the next sections explain.

How to Sign It in New Mexico

New Mexico keeps the signing rules short. A power of attorney for health care must be in writing and signed by you, the principal. That is the core rule, and the statute adds no witness or notary requirement. (See NMSA 1978, Section 24-7A-2(B).)

Here is what that rule means for you:

  • Witnesses are not required. This is a real difference from many states. The optional statutory form even says it is "recommended but not required" that you ask two other people to sign as witnesses. Witnesses can add evidentiary weight if anyone later questions your signature, so many people use them anyway. If you do, best practice is to not let your named agent serve as a witness. (See NMSA 1978, Section 24-7A-4.)
  • Notarization is not required either. New Mexico does not condition a valid directive on a notary. A notarized signature can still help if you travel or move, but it is not a validity rule here.
  • An individual instruction can even be oral. If you give only an instruction about your care, that instruction may be oral or written. An oral instruction works when you personally inform a health-care provider, and it can be limited to take effect only if a specific condition arises. Unlike some states, New Mexico does not require a terminal-condition diagnosis before you give an oral instruction. The agent-appointment part, though, must always be written and signed. (See NMSA 1978, Section 24-7A-2(A).)

There is one limit on who can serve. Unless your agent is related to you by blood, marriage, or adoption, the agent may not be an owner, operator, or employee of a health-care institution where you are receiving care. That rule guards against a conflict of interest. (See NMSA 1978, Section 24-7A-2(B).)

When the Directive Takes Effect

A New Mexico advance directive does not always switch on the moment you sign it. Unless the document says otherwise, your agent's authority becomes effective only after a determination that you lack capacity to make your own health-care decisions, and the authority ends if you recover capacity. While you can still decide for yourself, you stay in charge, and your own current choices control. (See NMSA 1978, Section 24-7A-2(C).)

The Uniform Health-Care Decisions Act sets out how that finding works:

  • You are presumed to have capacity to make a health-care decision and to give or revoke a directive. (See NMSA 1978, Section 24-7A-11.)
  • Unless your written directive says otherwise, a determination that you lack capacity must be made by two qualified health-care professionals, one of whom must be your primary physician.
  • If the lack of capacity is tied to mental illness or developmental disability, one of those two professionals must be someone whose training and expertise help assess functional impairment.

You can also flip the timing. By initialing the right box on the optional form, you can make your agent's authority effective immediately, even while you still have capacity, if that is what you want. (See NMSA 1978, Section 24-7A-4.)

For the end-of-life instructions in your directive to apply, the optional form adds a layered trigger. You must be unable to make or communicate decisions about your care, and one of these must be true: you have an incurable or irreversible condition that will cause death within a relatively short time, you become unconscious and to a reasonable degree of medical certainty will not regain consciousness, or the likely risks and burdens of treatment would outweigh the expected benefits. Then your chosen end-of-life direction controls. (See NMSA 1978, Section 24-7A-4.)

Who Decides If You Have No Directive

If you never named an agent, New Mexico does not leave the decision open. State law sets a default surrogate priority list. Once two qualified professionals determine that you lack capacity and there is no agent or guardian who is reasonably available, the right to decide passes down this order. (See NMSA 1978, Section 24-7A-5.)

PriorityWho can decide
1A spouse, unless legally separated or unless a petition for annulment, divorce, dissolution, or legal separation is pending
2A partner in a long-term relationship who has shown a real, spouse-like commitment to your care
3An adult child
4A parent
5An adult brother or sister
6A grandparent
7If none of the above is reasonably available, an adult who has shown special care and concern, knows your values, and is reasonably available

A few rules shape how this list works:

  • A surrogate acts only when you lack capacity and there is no agent or guardian to step in, or that person is not reasonably available.
  • The same agent-eligibility limit applies. Unless related to you by blood, marriage, or adoption, a surrogate may not be an owner, operator, or employee of a health-care institution where you are receiving care.
  • If members of the same class disagree, the supervising provider follows the decision of a majority of that class who have spoken up. If a class is evenly divided, that class and everyone of lower priority is disqualified.
  • A surrogate must decide based on your known wishes, or, if those are unknown, on your best interest, considering your personal values. A decision cannot rest only on a pre-existing condition or disability.
  • You can disqualify anyone from acting as your surrogate at any time, by a signed writing or by personally telling a health-care provider.

The takeaway for planning: the surrogate list works, but it may put the decision with someone you would not have picked, or split it among several people. Naming your own agent in an advance directive keeps that choice in your hands.

Changing or Revoking Your Directive

A New Mexico advance directive does not expire. It stays in force until you revoke it or replace it. You have a lot of room to change course. (See NMSA 1978, Section 24-7A-3.)

You can change your plan in several ways:

  • Revoke the agent by a signed writing, or by personally informing your supervising health-care provider.
  • Revoke any other part of the directive at any time, in any manner that communicates an intent to revoke. The agent designation has the stricter rule above; the rest is flexible.
  • Sign a new directive. A later advance directive revokes an earlier one to the extent the two conflict.
  • Tell your providers. A provider, agent, or surrogate who learns of a revocation must pass that on to your supervising provider and any institution caring for you.

One automatic rule is worth knowing for spouses. If you named your spouse as agent and a petition for annulment, divorce, dissolution of marriage, or legal separation is filed, your spouse's designation as agent is revoked, unless your directive says otherwise. That designation can revive if you remarry the former spouse or if the case is dismissed with your consent. If a split happens, sign a new directive naming someone else so you are not left without an agent. (See NMSA 1978, Section 24-7A-3(D).)

New Mexico Has No State Registry, So Share Your Copies

Some states run an online registry where you can store an advance directive. New Mexico does not maintain one under the Uniform Health-Care Decisions Act, and your directive does not depend on registration to be valid. The act takes a simpler route: give copies to the people who need them. (See NMSA 1978, Section 24-7A-12.)

After you sign, hand a copy to your primary physician, any other providers you see, any institution where you are receiving care, and every agent and alternate you named. A copy has the same legal effect as the original, so you do not have to track down a single signed sheet in an emergency. Talk with your named agent too, so they understand your wishes and are willing to take the role.

A Simple Planning Sequence

Use this order as a planning checklist, then confirm the details with a New Mexico attorney or your provider:

  1. Decide whether you want individual instructions, a named agent, or both in one document.
  2. Choose your health-care agent and one or two alternates, and ask them first.
  3. Write your care instructions, including end-of-life wishes, artificial nutrition and hydration, pain relief, and any anatomical gift.
  4. Sign and date the directive. Witnesses are not required, but you may add two if you want the extra evidentiary weight.
  5. Give signed copies to your agent, your alternates, your doctor, and any institution caring for you.
  6. Review it after any major life change, especially marriage or divorce, and replace it if your wishes change.

Pair this directive with the rest of your plan. The New Mexico power of attorney guide covers who manages your money and property if you cannot, the New Mexico guardianship and conservatorship guide covers the court process a directive can help you avoid, and the how to avoid probate in New Mexico guide covers passing assets without a court file. A directive stops working at death, so when an estate has to be settled, start with first steps after a death in New Mexico and the New Mexico probate help hub.

This New Mexico advance directive guide is a planning map, not legal advice. The Uniform Health-Care Decisions Act and the official New Mexico Statutes control. Confirm the current statute text and the optional form before you sign, and talk with a New Mexico attorney for a directive built around your wishes.

This guide is general information about New Mexico estates. It is not legal advice. Confirm anything that affects your situation with the county probate court, the district court, or a licensed New Mexico attorney.

Sources

Information current as of June 22, 2026

This content is for informational purposes only and does not constitute legal advice. Probate laws and procedures in New Mexico can change. Consult with a qualified attorney for advice specific to your situation. Full disclaimer.

Need Help With Your Probate Case?

Take our free assessment to understand your options and get personalized guidance for your situation.

Take Free AssessmentFind Your County
← Back to Resources