New Mexico: Health Care Power of Attorney Requirements
The short answer
A New Mexico health care power of attorney must be in writing and signed by an adult or emancipated minor while the signer has capacity. Witnesses and notarization are not required; the statutory form recommends two witnesses but expressly makes them optional.
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This is the general rule in New Mexico. Ezel applies current New Mexico law to your specific facts and answers with citations to the statutes.
| Governing law & document | Uniform Health-Care Decisions Act, NMSA 1978 §§ 24-7A-1 to -18; optional combined advance-directive form at § 24-7A-4. |
|---|---|
| Who can sign | An adult or emancipated minor, while having capacity, must execute the power "in writing and signed by the principal" (§ 24-7A-2(B)). |
| Witnesses or notary | No witnesses or notary required. The optional form says two witnesses are "recommended but not required" and labels their signatures optional (§ 24-7A-4). |
| Who can't witness or serve | Because witnesses are optional, the Act states no witness-qualification list. An unrelated owner, operator, or employee of the institution caring for the principal may not serve as agent (§ 24-7A-2(B)); the bar does not apply to a relative by blood, marriage, or adoption. |
| When the agent can act | Springing by default: authority begins when two qualified health-care professionals, one the primary care practitioner, determine incapacity; the document may provide for immediate authority (§§ 24-7A-2(C), 24-7A-11(C)). |
| Agent's powers & limits | May make any health-care decision the principal could make and must follow known instructions and wishes (§ 24-7A-2(B), (E)). No authority to consent to mental-health-facility admission; an express directive may permit presenting the principal for evaluation (§ 24-7A-13(E)). |
| How to revoke | While having capacity, revoke the agent by signed writing or personally informing the supervising provider; a divorce/annulment/separation petition or decree revokes a spouse-agent unless the directive or decree says otherwise (§ 24-7A-3(A), (D)). |
| Out-of-state directives | A directive complying with the Act is valid regardless of where executed, and one validly executed under another jurisdiction's law is valid and enforceable in New Mexico to the same extent (§ 24-7A-16(A), (C)). |
Compare this rule across all 50 states + DC →
New Mexico uses a combined advance health-care directive. Part 1 of the
optional statutory form appoints an agent; Part 2 records treatment instructions;
and Part 3 designates a primary care practitioner. This page covers the
agent-appointment part under the Uniform Health-Care Decisions Act, NMSA 1978
§§ 24-7A-1 to -18.
Requirements one by one
Governing law and document
The Act says its form "may, but need not, be used" and permits an individual to
"complete or modify all or any part" of it (§ 24-7A-4). A different written form
can work, but the other provisions of the Act still control its legal effect.
Who can sign
An adult or emancipated minor, while having capacity, may execute the power.
It "must be in writing and signed by the principal" (§ 24-7A-2(B)). The Act
presumes capacity, and refusing a recommended treatment by itself does not prove
incapacity (§ 24-7A-11(B), (D)).
Witnesses or notary
Neither is required. The statutory form says to sign and date it, then states:
"It is recommended but not required that you request two other individuals to
sign as witnesses" (§ 24-7A-4). Its witness block is expressly labeled
"(Optional)." The Act does not add a notarization requirement.
Who cannot serve
Because witnesses are optional, the Act does not create a witness-disqualification
list. It does restrict the agent: unless related to the principal by blood,
marriage, or adoption, the agent may not be "an owner, operator or employee of a
health-care institution at which the principal is receiving care"
(§ 24-7A-2(B)).
When the agent can act
The default is springing authority. It begins only when the principal lacks
capacity and ends if capacity returns (§ 24-7A-2(C)). Unless the directive chooses
a different test, incapacity must be determined by two qualified health-care
professionals, one of whom is the primary care practitioner
(§ 24-7A-11(C)). The statutory form also lets the principal initial a box to make
the agent's authority effective immediately.
Powers and limits
The power may authorize the agent to make "any health-care decision the principal
could have made while having capacity" (§ 24-7A-2(B)). The agent must follow the
principal's instructions and known wishes; if those are unknown, the agent uses
the principal's best interest and known personal values (§ 24-7A-2(E)). The
optional form expressly includes decisions about artificial nutrition, hydration,
and other life-sustaining care.
One statutory limit is unusually specific: the agent cannot consent to admission
to a mental health-care facility. If the written directive expressly permits
treatment there, the agent may present the principal for an admission evaluation
(§ 24-7A-13(E)).
How to revoke
While having capacity, the principal may revoke the agent designation by a signed
writing or by personally informing the supervising health-care provider
(§ 24-7A-3(A)). If the principal cannot sign a written revocation, another person
may sign for the principal, but that revocation needs two witnesses who sign in
the principal's and each other's presence. A later conflicting directive revokes
the earlier one to the extent of the conflict (§ 24-7A-3(E)).
The filing of a petition — not merely the final decree — for annulment, divorce,
dissolution, or legal separation revokes a spouse-agent unless the directive or
decree provides otherwise (§ 24-7A-3(D)).
Out-of-state directives
New Mexico expressly recognizes portability. A directive complying with the Act
is valid "regardless of when or where executed or communicated," and a similar
document executed under another jurisdiction's law is valid and enforceable in
New Mexico to the same extent as a New Mexico document (§ 24-7A-16(A), (C)).
What trips people up
- A two-witness or notary block can be more formal than New Mexico law. The
statute recommends witnesses but does not require them, and it does not require
notarization (§ 24-7A-4). Signing an extra attestation is different from the
state making it a validity condition. - Revoking an agent is stricter than changing treatment instructions. The
agent designation requires a signed writing or personal notice to the
supervising provider; other instructions may be revoked in any manner that
communicates the intent (§ 24-7A-3(A)-(B)). - Mental-health-facility admission is not part of the ordinary broad grant.
Even broad agent language does not itself authorize consent to admission; an
express treatment provision permits presentation for evaluation, not the
agent's unilateral admission decision (§ 24-7A-13(E)).
Common questions
Does a New Mexico health care power of attorney need witnesses?
No. Two witnesses are recommended but expressly optional (§ 24-7A-4).
Does it need to be notarized?
No. The Act requires a signed writing and does not make acknowledgment before a
notary a validity condition (§§ 24-7A-2(B), 24-7A-4).
Can the agent act immediately?
Yes, if the document says so. Otherwise authority begins after the statutory
incapacity determination (§§ 24-7A-2(C), 24-7A-11(C)).
Will a directive signed in another state work in New Mexico?
Yes, if it complied with the law of the state or jurisdiction where it was
executed (§ 24-7A-16(C)).
Statutes and sources
- NMSA 1978 § 24-7A-2(B)-(F) — who may execute the power, the signed-writing
requirement, agent eligibility, default effective time, scope, and decision
standard.
https://hsc.unm.edu/medicine/departments/pediatrics/divisions/continuum-of-care/pdf/uniformhealthcare.pdf
(accessed 2026-07-16) - NMSA 1978 § 24-7A-3(A)-(E) — revoking the agent, communicating revocation,
spouse-agent revocation, and later conflicting directives.
https://hsc.unm.edu/medicine/departments/pediatrics/divisions/continuum-of-care/pdf/uniformhealthcare.pdf
(accessed 2026-07-16) - NMSA 1978 § 24-7A-4 — optional statutory form, optional witnesses,
immediate-authority election, and broad listed powers.
https://www.nmlegis.gov/Sessions/15%20Regular/final/SB0299.pdf
(accessed 2026-07-16) - NMSA 1978 § 24-7A-11(A)-(F) — capacity presumption and the default
two-professional incapacity determination.
https://www.nmlegis.gov/Sessions/15%20Regular/final/SB0299.pdf
(accessed 2026-07-16) - NMSA 1978 § 24-7A-13(E) — mental-health-facility admission limit.
https://hsc.unm.edu/medicine/departments/pediatrics/divisions/continuum-of-care/pdf/uniformhealthcare.pdf
(accessed 2026-07-16) - NMSA 1978 § 24-7A-16(A)-(C) — validity regardless of place and recognition
of documents executed under another jurisdiction's law.
https://hsc.unm.edu/medicine/departments/pediatrics/divisions/continuum-of-care/pdf/uniformhealthcare.pdf
(accessed 2026-07-16)
Source links
Every statute quoted above, linked, with the date we checked it.
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