Living Will and Advance Health-Care Instruction Requirements in Idaho
At a glance
| Governing law and document | Idaho Medical Consent and Natural Death Act, Idaho Code §§ 39-4501–39-4515. The treatment instruction is an 'advance care planning document' (ACPD), which may also nominate an agent; the Department of Health and Welfare may publish an optional, nonmandatory form (§§ 39-4502(1), 39-4510). Separate from a clinician POST order |
|---|---|
| Who may make an instruction | Any competent person age 18+ (§ 39-4510(1)). Competence means comprehending the need for, nature of, and significant risks ordinarily inherent in the contemplated health-care services (§§ 39-4503, 39-4509(4)) |
| Oral, written, and signature form | A valid ACPD is a document containing the person's name, birth date, telephone number, mailing address, signature of the person or authorized agent, and signing date (§ 39-4510(1)). Other blanks are intentional, not invalidating. Chapter 45 provides no electronic-specific execution rule |
| Witness, notary, and disqualifications | No witness or notary is required. Witness names/contact information and notarization are expressly optional (§ 39-4510(2)(j)–(k)); the ACPD statute therefore states no mandatory-witness disqualification list |
| Covered conditions and trigger | Effective from execution until revoked or replaced; no statutory terminal-condition, vegetative-state, incapacity, or clinician-certification trigger (§ 39-4512). The maker may write treatment objectives and end-of-life conditions, and Idaho recognizes their wishes when they can no longer communicate (§§ 39-4509, 39-4510(2)) |
| Treatment, nutrition, hydration, and comfort | May include resuscitation, end-of-life, and treatment-objective instructions (§ 39-4510(2)). May direct provision or denial of treatment, assisted feeding, and artificial nutrition/hydration; directed feeding/nutrition/hydration may not be withdrawn, comfort care remains required, and CPR is presumed unless the ACPD says otherwise (§§ 39-4502(8), 39-4514(3)–(5)) |
| Pregnancy and other statutory limits | The ACPD may include pregnancy instructions; the adult-ACPD provisions state no categorical pregnancy, viability, or live-birth override (§ 39-4510(2)(e)). The Act does not authorize euthanasia, mercy killing, assisted suicide, or an affirmative/deliberate life-ending act beyond natural dying, and it does not require nonbeneficial treatment (§ 39-4514(2), (6)) |
| Revocation, notice, and registry | Revoke anytime by directed destruction, signed writing, oral expression, or any other clear act; maker must notify providers, who may rely until actual knowledge (§ 39-4511A). Suspend by signed writing, oral expression, or another clear act, with resumption on stated termination terms (§ 39-4511B). Optional DHW registry; nonregistration does not affect validity (§§ 39-4514(10), 39-4515) |
| Provider duties, recognition, and effect | Good-faith reliance on a facially valid ACPD is immune; an ethical/professional objector may withdraw after a good-faith effort to help obtain a willing provider, subject to treatment-direction limits (§§ 39-4513, 39-4514(3)). Registry lookup is optional. No express foreign-execution safe harbor; the Act broadly protects any document authentically expressing a competent person's wishes (§§ 39-4502(1)(c), 39-4509(3), 39-4514(7)) |
Idaho's Medical Consent and Natural Death Act, §§ 39-4501–39-4515, uses an advance care planning document, or ACPD, for an adult's own treatment instructions. It may also name a health-care agent, but agent appointment is optional and outside this page's focus.
Requirements one by one
The current execution rule is short
Under § 39-4510, a competent person age 18 or older may execute an ACPD. The document must give the person's name, date of birth, telephone number, and mailing address; bear the person's or an authorized agent's signature; and state the signing date. Blank optional provisions are treated as intentional and do not invalidate the document. § 39-4503 defines competence functionally by whether the person comprehends the need for, nature of, and significant risks ordinarily inherent in the contemplated health-care services.
Witnesses and notarization are optional. The same section places witness names and notarization in the list of items an ACPD "may but is not required to include." Idaho's current statute therefore has no mandatory witness class or witness-disqualification screen for this document.
Idaho does not impose a diagnosis or incapacity trigger
The ACPD is effective from execution until revocation or replacement under § 39-4512. The current Act does not require a terminal diagnosis, persistent vegetative state, incapacity certification, or a specified number of clinician findings before the written instruction has legal effect.
The maker may instead write the conditions and treatment objectives that should control. § 39-4509 recognizes the right to have those wishes carried out when the person can no longer communicate, and says any authentic expression of the person's health-care wishes should be honored.
Treatment directions can require or refuse care
An ACPD may include resuscitation instructions, end-of-life instructions, and treatment objectives under § 39-4510. Idaho's definition of consent also includes refusal and consent to withholding or withdrawal (§ 39-4502(8)).
The direction matters in both directions. Under § 39-4514(3), assisted feeding or artificial nutrition and hydration may not be withdrawn or denied when the ACPD directs that it be provided. The same subsection says treatment, feeding, nutrition, or hydration must be withdrawn or denied when a valid ACPD directs denial. Other directed life-sustaining or comfort care remains subject to the Act's nonbeneficial-treatment rule.
If artificial life support or artificial nutrition and hydration are withheld or withdrawn, § 39-4514(4) still requires comfort care. CPR is presumed unless the ACPD or another listed legal direction says otherwise.
Revocation, suspension, and registration are separate choices
Under § 39-4511A, the maker may revoke at any time through directed destruction, signed writing, an oral expression, or another act clearly showing revocation. The maker is responsible for notifying providers; a provider may rely on the document until it has actual knowledge of revocation.
Idaho also permits temporary suspension. § 39-4511B allows a signed writing, oral expression, or another clear act, and the document resumes when the suspension's stated termination terms are met.
Registration with the Department of Health and Welfare is optional under §§ 39-4514 and 39-4515. Nonregistration does not affect validity, registry staff need not review legal sufficiency, and registration creates no validity presumption.
Providers receive immunity and a transfer route
Under § 39-4513, a provider acting in good faith under a facially valid ACPD receives the Act's civil, criminal, and professional-discipline immunity. A provider unwilling for ethical or professional reasons may withdraw only after a good-faith effort to help the patient obtain a willing provider, subject to the Act's rules protecting treatment the patient directed.
Idaho states no express rule validating a directive merely because it met another state's execution law. Its broader rule is that a directive includes another document authentically expressing a competent person's wishes (§ 39-4502(1)(c)), and § 39-4514(7) directs liberal effect for authentic prior wishes.
What trips people up
- A witness block is optional, even if a form prints one. The current mandatory list in § 39-4510(1) ends with identifying information, signature, and date.
- The maker chooses the medical conditions. A form that limits treatment instructions to terminal illness or permanent unconsciousness is narrower than Idaho's current statute, which imposes no diagnosis trigger.
- Feeding directions work both ways. A direction to provide assisted feeding or artificial nutrition and hydration bars withdrawal; a direction to deny it requires withdrawal or denial under § 39-4514(3).
- Pregnancy instructions are document-specific. § 39-4510(2)(e) lets the maker include them. The adult-ACPD provisions state no categorical pregnancy, viability, or probable-live-birth override.
Common questions
What happens if I leave an optional section blank? Section 39-4510 says the blank is treated as intentional and does not invalidate the ACPD.
Does registry filing prove that the document is valid? No. Under § 39-4515(3), the Department need not review compliance and filing creates no presumption of validity.
Does the 2023 rewrite invalidate an older directive? Not automatically. § 39-4514(7) preserves a document that met the elements in force when it was executed and calls for liberal effect to authentic prior wishes.
Must a provider search the registry? No. § 39-4513(4) says registration, revocation, or replacement does not require a provider to request registry information.
Statutes and sources
- Idaho Code §§ 39-4502 and 39-4503 — directive, treatment, comfort, consent, nonbeneficial-treatment, and competence definitions. Idaho State Legislature (accessed 2026-07-31).
- Idaho Code § 39-4509 — policy favoring authentic treatment wishes and communication after the person can no longer communicate. Same official source (accessed 2026-07-31).
- Idaho Code § 39-4510 — age, mandatory identifying fields, signature, date, optional treatment terms, pregnancy instructions, witnesses, and notarization. Same official source (accessed 2026-07-31).
- Idaho Code §§ 39-4511A and 39-4511B — revocation and suspension. Same official source (accessed 2026-07-31).
- Idaho Code § 39-4512 — effect from execution until revocation or replacement. Same official source (accessed 2026-07-31).
- Idaho Code §§ 39-4513 and 39-4514 — immunity, objecting-provider route, feeding and treatment directions, comfort care, CPR, nonbeneficial treatment, existing documents, and optional registration. Same official source (accessed 2026-07-31).
- Idaho Code § 39-4515 — optional registry, fee, no validity review, and deletion. Same official source (accessed 2026-07-31).
Source links
Every statute quoted above, linked, with the date we checked it.
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