Missouri Surrogate Decision Maker Lookup

Who can make medical and money decisions for an adult in Missouri who cannot decide: an agent, a guardian, or Missouri's default surrogate order. Runs in your browser; nothing is stored.

Missouri law checked against official sources on October 26, 2026.

Everything you enter stays in your browser. Nothing is sent, saved, or added to the page address. No names are asked for.

What needs deciding?
Can the person understand this decision and make it, with help if needed?
Which of these exist? (tick all that apply)

Who has authority in Missouri

  1. With no agent and no guardian, this state's default surrogate law applies only to some decisions or settings (see the scope below). Outside that scope, someone may need a court appointment.
  2. If nobody is available or the family disagrees, a court can appoint a guardian. That is slower and costs more than documents signed in advance.

Missouri's default surrogate order

  1. Spouse (Not if separated, incapable, whereabouts unknown or overseas)
  2. An adult child
  3. A parent
  4. A brother or sister
  5. A relative by blood or marriage
What it covers
The only ranked family list found applies to consent for experimental treatment, tests or drugs at a teaching hospital of an accredited medical school. Missouri has no general default-surrogate list.
Who decides the person cannot decide
Applies when the adult is incapable of informed consent for the experimental treatment; the section does not say who decides that.
Limits
  • The consenting person cannot go against the patient's expressed permission regarding the treatment.

Source: RSMo 431.064 · Checked October 26, 2026

Less certain: Our search found no general Missouri statute ranking family decision makers, but a full-text search of the Missouri statutes was not run.

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