Arizona Surrogate Decision-Maker: Who Decides If You Have No Advance Directive?

Arizona's Default Decision-Making Hierarchy

If you lose the ability to make medical decisions and have no advance directive in place, Arizona law does not simply let your family figure it out informally. Under A.R.S. § 36-3231, a rigid statutory surrogate hierarchy determines who gets authority — in this exact order:

1. Court-appointed guardian (if one exists)
2. Spouse
3. Adult child (majority rules if multiple)
4. Parent
5. Domestic partner
6. Brother or sister
7. Close friend

The first available person on this list who is willing and reasonably available becomes your surrogate decision-maker. Medical staff do not choose — the statute dictates.

Where This System Fails Families

The hierarchy looks clean on paper. In practice, it creates three recurring crises:

Disagreeing adult children. If you have three adult children and they disagree about whether to continue life support, the hospital cannot follow any single child's instruction. Arizona requires a majority of available adult children to agree. If they cannot, clinical decisions stall until a court intervenes.

Estranged family members. The hierarchy does not account for relationship quality. A spouse you are separated from (but not divorced from) still holds first priority. A parent you have not spoken to in decades ranks above a lifelong friend who knows your values intimately.

Unmarried partners. A domestic partner ranks fifth — below adult children and parents. If your partner has lived with you for 20 years but you never married, your estranged parents or distant siblings legally outrank them.

Court-Appointed Guardianship Overrides Everything

Under A.R.S. § 36-3231, a court-appointed guardian takes top priority — above a spouse, above anyone on the list. More critically, a guardian appointed for the express purpose of making healthcare decisions also overrides a previously designated healthcare agent under your HCPOA.

This means that if a family member persuades a court that your designated agent is not acting in your best interest, the court can appoint a guardian who supersedes your agent's authority. Your HCPOA does not provide absolute protection against guardianship — but it does make guardianship far less likely, because it demonstrates clearly who you chose while competent.

How an Advance Directive Bypasses the Hierarchy

A properly executed Health Care Power of Attorney under A.R.S. § 36-3221 replaces the entire surrogate hierarchy with your chosen agent. You decide who makes decisions — not the statutory list. Your domestic partner, your trusted friend, your most responsible adult child — whoever you designate takes priority over everyone else except a subsequently court-appointed guardian.

This is the single strongest reason to execute an advance directive, even if you are young and healthy: you are choosing your own decision-maker instead of accepting the state's default assignment.

The Guardianship Alternative Is Expensive and Slow

When families cannot resolve disagreements within the surrogate framework, or when no one on the list is willing or appropriate, the only remaining option is court-appointed guardianship. In Arizona:

• Filing fees alone are several hundred dollars
• Attorney costs typically run $3,000 to $10,000+
• The process takes weeks to months
• Court hearings are required
• The incapacitated person loses legal rights
• Annual reporting requirements apply to the guardian

An advance directive costs a fraction of this — executed in one afternoon — and prevents the entire situation.

Protecting Against the Wrong Surrogate

If there is someone on the statutory list you specifically do not want making decisions for you — an estranged spouse, a parent with conflicting values, a sibling you do not trust — the only way to prevent their authority is to execute a Healthcare POA naming someone else. Without one, the hierarchy controls, and personal preferences are irrelevant.

The Arizona Advance Directive & Living Will Kit walks you through selecting and formally designating your healthcare agent so your decisions stay with the people you trust — not the people a statute assigns.

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