Cruzan v. Director, Missouri Dept. of Health — Right to Refuse Life-Sustaining Treatment

Cruzan v. Director, Missouri Department of Health, 497 U.S. 261 (1990), is the Supreme Court's landmark ruling on the constitutional dimensions of the right to die — specifically, the right of a competent person to refuse life-sustaining medical treatment. In a 5-4 decision written by Chief Justice Rehnquist, the Court assumed for the first time that a constitutionally protected liberty interest exists in refusing unwanted medical treatment, rooted in the Fourteenth Amendment's Due Process Clause. But the Court also held that this liberty interest does not automatically override a state's legitimate interest in preserving life — and that Missouri could constitutionally require clear and convincing evidence of an incompetent patient's wishes before authorizing the withdrawal of artificial nutrition and hydration. Nancy Cruzan, the patient at the center of the case, had been in a persistent vegetative state since a 1983 automobile accident; her family sought to remove the feeding tube that kept her alive. Missouri refused without proof of Nancy's prior expressed wishes beyond a "reasonable doubt." The Supreme Court upheld Missouri's evidence standard, but recognized the bedrock constitutional principle that a competent person has the right to refuse medical treatment — a holding that created the constitutional foundation for all subsequent right-to-die law, including Washington v. Glucksberg (1997) and the Patient Self-Determination Act of 1990.

Current Law (2026)

Legal Authority

• U.S. Const. amend. XIV, § 1 — Due Process Clause: "nor shall any State deprive any person of life, liberty, or property, without due process of law" — the Clause from which the Court derived the liberty interest in refusing treatment
• 42 U.S.C. § 1395cc(f) — Patient Self-Determination Act (1990): Medicare/Medicaid-participating facilities must inform patients of their right to make advance directives and to refuse treatment; enacted the year Cruzan was decided
• Washington v. Glucksberg, 521 U.S. 702 (1997) — Distinguished Cruzan: the right to refuse life-sustaining treatment (negative — withdrawal) does not extend to physician-assisted suicide (affirmative — assistance causing death); Glucksberg established the "deeply rooted in history and tradition" test for substantive due process
• Vacco v. Quill, 521 U.S. 793 (1997) — Equal protection companion to Glucksberg; state law permitting withdrawal of life-sustaining treatment while prohibiting assisted suicide is rational; the two practices are constitutionally distinguishable
• State advance directive statutes — All 50 states and D.C. have enacted living will and/or healthcare proxy laws, giving legal effect to the right Cruzan recognized; see Advance Directives & Patient Self-Determination

Key Mechanics

Cruzan v. Director (1990) established three operating rules for end-of-life medical decisions: (1) constitutional right to refuse treatment — a competent person has a liberty interest under the Due Process Clause in refusing unwanted medical treatment, including life-sustaining measures (this includes the right to refuse artificially delivered nutrition and hydration); (2) state evidence standard — states may require "clear and convincing evidence" of an incompetent patient's prior wishes before authorizing treatment withdrawal; states are not constitutionally required to accept substituted judgment by family members without such evidence; and (3) advance directives — the practical response to Cruzan was the nationwide proliferation of advance directive laws: living wills and healthcare proxies that provide the clear-and-convincing evidence states may require. Cruzan did not create a constitutional right to die on demand — it recognized a right to refuse treatment that is balanced against state interests in the preservation of life and prevention of abuse.

How It Works

Background: Nancy Cruzan's accident and the legal dispute. On January 11, 1983, Nancy Beth Cruzan lost control of her car on an icy Missouri road. Paramedics found her face-down in a ditch, with no detectable vital signs. She was resuscitated but sustained profound brain damage from the period of oxygen deprivation. After weeks of hospitalization, she remained in what physicians described as a persistent vegetative state — she had some spontaneous movement and could breathe on her own, but had no cognitive function and no awareness of her surroundings. She was maintained by artificial nutrition and hydration delivered through a surgically implanted gastrostomy tube.

Her parents, Lester and Joyce Cruzan, were her court-appointed guardians. They sought to have the feeding tube removed, believing Nancy would not have wanted to be kept alive in her condition. Nancy had made statements to a housemate suggesting she would not want to continue living if injured and could not live "at least halfway normally." Missouri law required that the evidence of an incompetent patient's wishes meet a "clear and convincing" standard — a high evidentiary bar — before the state would authorize withdrawal. A Missouri trial court initially authorized tube removal; the Missouri Supreme Court reversed, finding the housemate testimony insufficient under the clear-and-convincing standard. The U.S. Supreme Court granted certiorari.

The Rehnquist majority: a liberty interest, but with state limits. Chief Justice Rehnquist's majority opinion began with the common law foundation: the "logical corollary of the doctrine of informed consent" — the principle that no person may be subjected to medical treatment without consent — "is that the patient generally possesses the right not to consent, that is, to refuse treatment." This principle had deep common law roots, recognized in state court decisions stretching back to the nineteenth century. A state's authorization of a medical procedure over the patient's objection would constitute battery.

The majority assumed (without definitively deciding) that a competent person has a constitutionally protected liberty interest in refusing unwanted medical treatment. This assumption was significant — it acknowledged a substantive constitutional right that the Due Process Clause protects, even though it left the precise contours for future cases.

The harder question was Nancy's situation: she was not competent to exercise a choice. Could the state impose evidentiary requirements on how her prior wishes were to be proved? The majority said yes. The state's legitimate interest in preserving human life was substantial, and a state could guard against potential abuses — mistaken diagnoses, families motivated by financial interests, errors in identifying the patient's prior wishes — by requiring that evidence of prior wishes meet a clear-and-convincing standard. Missouri's choice to impose this high evidentiary bar was constitutional.

The majority distinguished between the constitutional right of a competent person (absolute — the state cannot override a competent adult's treatment refusal) and the rights of an incompetent patient whose prior wishes must be inferred from past statements (where states may require rigorous evidence). This distinction became central to all subsequent right-to-die law.

Justice O'Connor's concurrence: advance directives are the answer. Justice O'Connor concurred but wrote separately to emphasize that the right to refuse treatment is genuine and significant — and that states could protect this right more robustly by giving legal effect to advance directives (living wills and healthcare proxies). O'Connor noted that instructing family members or healthcare proxies to refuse treatment on a patient's behalf should be constitutionally protected — a competent person's right to designate an agent to make healthcare decisions is a natural extension of the right Cruzan recognized. O'Connor's concurrence helped precipitate the Patient Self-Determination Act, enacted just months after Cruzan, which required healthcare facilities receiving Medicare and Medicaid funds to inform patients about their right to create advance directives.

Justice Scalia's concurrence: this is not a constitutional question. Scalia agreed that Missouri's law was valid but entirely rejected the majority's framework. In his view, the Constitution says nothing about the right to die, and the Court had no business finding such a right in the Due Process Clause. Cruzan was the latest instance of the Court using "substantive due process" to constitutionalize policy questions better left to democratic legislatures. States should be free to adopt any approach they choose — including prohibiting withdrawal of life-sustaining treatment from incompetent patients — without constitutional constraint. Scalia's concurrence anticipated his later dissent in Washington v. Glucksberg (where he was part of the majority) and previewed Dobbs v. Jackson Women's Health Organization's rejection of substantive due process as applied to abortion.

Justice Brennan's dissent: Nancy's liberty interest should prevail. Justice Brennan (joined by Marshall and Blackmun) dissented forcefully. Nancy Cruzan had a fundamental right under the Due Process Clause to be free of unwanted medical treatment — this right should be balanced against state interests, not simply overridden by Missouri's high evidentiary standard. Brennan argued that the liberty interest of a person in Nancy's condition was at its zenith: she was being subjected to invasive medical treatment she almost certainly would not have wanted, with no possibility of recovery, against the wishes of the family who knew her best. The state's interest in life — when there was no life to preserve in any meaningful sense — should not outweigh this. Missouri's burden of clear-and-convincing evidence was too heavy a thumb on the scale, likely to condemn many people to treatment they would have refused.

Justice Stevens's separate dissent argued that the state had no legitimate interest in "life" divorced from the patient's own conception of what made life worth living — that biological continuation of an irreversible vegetative state was not "life" in the constitutional sense worth protecting.

Nancy Cruzan's death. After the Supreme Court's decision, the Cruzans returned to Missouri state court with additional evidence from Nancy's former coworkers, who testified to her expressed wishes. The trial court found the evidence sufficient to meet the clear-and-convincing standard and authorized tube removal. The Missouri Attorney General chose not to appeal. The feeding tube was removed on December 14, 1990; Nancy Cruzan died on December 26, 1990, twelve days later.

Legacy: the right to refuse treatment and the right to die. Cruzan established two lasting principles that have shaped American medical and constitutional law:

First, a competent person's right to refuse life-sustaining medical treatment is constitutionally protected. No state can force a competent patient to continue receiving unwanted treatment — chemotherapy, dialysis, ventilators, feeding tubes, or any other intervention. This right is effectively absolute for competent patients.

Second, states may impose procedural safeguards before authorizing withdrawal of treatment from incompetent patients, including high evidentiary standards for proving prior wishes. The mechanism for protecting incompetent patients' rights is advance directives — documents executed while competent that give legally binding instructions for future incapacity.

Cruzan also anchored the constitutional distinction the Court drew in Washington v. Glucksberg (1997) between the right to refuse treatment (withdrawal — passive, constitutionally protected) and the right to physician-assisted suicide (active assistance in dying — not constitutionally required, though states may permit it). The Glucksberg Court repeatedly cited Cruzan as establishing the outer boundary of the constitutionally protected right to die.

How It Affects You

If you are a patient, family member, or caregiver navigating end-of-life care: Cruzan's most practical legacy is the legal framework it created for advance directives. The right the Court recognized — to refuse life-sustaining treatment — is your right, and it can be protected even after you lose the ability to communicate through a properly executed advance directive. A living will (also called a directive to physicians, healthcare declaration, or advance healthcare directive) specifies which treatments you do or do not want in specific circumstances. A healthcare proxy (durable power of attorney for healthcare) designates a person to make decisions on your behalf if you cannot. These documents are the mechanism Cruzan said states could use to honor patients' pre-expressed wishes — and the Patient Self-Determination Act requires hospitals, nursing homes, home health agencies, and hospices receiving Medicare and Medicaid funding to inform you of your right to create them. Without an advance directive, your family members may face the evidentiary burden the Cruzans faced — having to prove your wishes to a court's satisfaction under a "clear-and-convincing" or similar standard. With a properly executed directive, your wishes are documented and legally binding. See Advance Directives & Patient Self-Determination for the practical steps to create these documents in your state.

If you are a healthcare provider, hospital administrator, or nursing home operator: Cruzan and its aftermath created your legal and ethical framework for withdrawing life-sustaining treatment. The constitutional right recognized in Cruzan — that a competent person may refuse treatment — is now implemented through state law and the Patient Self-Determination Act (42 U.S.C. § 1395cc(f)). Your obligations: inform patients at admission of their right to make advance directives; document in the medical record whether an advance directive exists; not condition treatment on whether a patient has an advance directive; honor valid advance directives and substitute decision-maker instructions. For incompetent patients without advance directives, your state's law specifies the surrogate decision-making hierarchy (typically spouse → adult children → parents → siblings) and the standard of decision (substituted judgment — what would the patient have wanted — or best interests, if wishes are unknowable). Withdrawing medically-provided nutrition and hydration from a patient in a persistent vegetative state is legally permissible when there is clear evidence of the patient's prior wishes or under the applicable surrogate decision-making standard. Consult your institution's ethics committee and legal counsel for specific situations — the procedures vary by state law.

If you are a family member seeking to make end-of-life decisions for an incapacitated loved one: Cruzan established that states may require clear-and-convincing evidence of a patient's prior wishes before authorizing withdrawal of life-sustaining treatment — and that courts have authority to impose this standard. If your loved one has an advance directive or healthcare proxy, this standard is met: the documented instructions constitute the required evidence. If they do not have written documentation, you may need to gather testimony from family members, friends, healthcare providers, and others who heard your loved one express wishes about end-of-life care. In most states, a surrogate decision-maker (you, as family member) can authorize withdrawal of treatment under a substituted judgment standard if you can credibly establish what the patient would have wanted. Consulting an elder law attorney or hospital ethics committee early — before a crisis — is advisable. If the treating facility and surrogate decision-maker agree, court involvement is typically not required; courts become involved when there is conflict between the family and the institution, or when the state mandates judicial review for certain decisions.

If you are an attorney, ethicist, policy advocate, or legal academic: Cruzan is foundational to both the legal and ethical framework for medical decision-making at the end of life. Its most significant unresolved doctrinal questions are: (1) what is the precise constitutional status of the liberty interest recognized? The majority said only that it "assumed" the interest was constitutionally protected, leaving the foundation imprecise; (2) does the right extend to other forms of withdrawal (cessation of dialysis, ventilator withdrawal, voluntary stopping of eating and drinking)? Courts have consistently said yes; (3) does the right extend to decisions made by surrogates on behalf of incompetent patients who left no prior expressed wishes? Most states resolve this through substituted judgment and best-interests standards at common law and by statute, not constitutional mandate; (4) does the Glucksberg "deeply rooted in history and tradition" test call into question the Cruzan liberty interest, given that withdrawal of life-sustaining treatment was rare and legally unsettled in 1990? The Glucksberg majority treated Cruzan as settled and did not apply the rigorous history-and-tradition test to it — suggesting the right to refuse treatment occupies a special constitutional space that pre-dates the test's formulation. The tension between Cruzan's assumed liberty interest and Glucksberg's stringent test for new fundamental rights is a live doctrinal question.

State Variations

Cruzan established a constitutional floor — states must respect a competent patient's right to refuse treatment — while giving states substantial latitude in how they handle incompetent patients. State law varies significantly:

Surrogate decision-making frameworks: All 50 states and D.C. have enacted some combination of living will statutes, healthcare proxy laws, and surrogate decision-making hierarchies. The specific requirements for executing a valid advance directive (witnesses, notarization, form requirements), the scope of what decisions a proxy can make, and the surrogate hierarchy (who decides if no proxy is named) vary considerably. The Uniform Health-Care Decisions Act (1993, adopted in full or part by roughly 12 states) provides a model framework; most states have their own variations.

Nutrition and hydration: Some states specifically address artificial nutrition and hydration in their advance directive statutes, either permitting or restricting the right to refuse it. Most states permit refusal of all life-sustaining treatment, including nutrition and hydration, through advance directive.

POLST programs: Physician Orders for Life-Sustaining Treatment (POLST) forms — now available in approximately 45 states — translate patient wishes into immediately actionable medical orders that travel between care settings. These programs implement Cruzan's framework at the clinical level, reducing the need for judicial intervention.

Clear-and-convincing evidence: Following Cruzan, most states have enacted legislation or common law rules clarifying the evidentiary standards for surrogate decisions. Many states do not require clear-and-convincing evidence for all treatment-withdrawal decisions — they permit surrogates to act under a substituted judgment or best-interests standard. Missouri's particularly stringent standard was constitutional under Cruzan but represents one end of the spectrum, not the nationwide norm.

Aid-in-dying statutes: Approximately 11 states and D.C. have enacted physician-assisted dying or "aid in dying" statutes that go beyond Cruzan's holding — permitting physicians to prescribe lethal medications for terminally ill patients who request them. These statutes represent a voluntary extension of end-of-life autonomy beyond what Cruzan required and Glucksberg permitted states to enact if they choose. See Washington v. Glucksberg for the constitutional framework.

Pending Legislation

Cruzan's holding — that a competent person may refuse life-sustaining treatment — is constitutionally established and would require a constitutional amendment to reverse. The legislative landscape concerns implementation:

• Patient Self-Determination Act (42 U.S.C. §§ 1395cc(f), 1396a(w)) — Enacted in 1990, the year Cruzan was decided; requires Medicare and Medicaid providers to inform patients of their advance directive rights; remains in effect. No significant amendments are pending.
• Advance Directive Portability: No federal legislation currently ensures that advance directives are honored across state lines, though most states recognize out-of-state directives that substantially comply with in-state requirements. Bills to create federal portability standards have been introduced but not enacted.
• State aid-in-dying legislation: The more active legislative frontier is state-level physician-assisted dying bills, which go beyond Cruzan to permit affirmative assistance in dying. These build on Cruzan's foundation of patient autonomy while addressing the distinct constitutional question resolved in Glucksberg.

Recent Developments

• 2024–2026 — State expansion of aid-in-dying: Delaware enacted aid-in-dying in 2025, Illinois in December 2025, and New York in February 2026; legislation in Massachusetts and other states remains pending. These developments trace back to Cruzan's foundational recognition of end-of-life autonomy, extending it through state democratic processes beyond what Glucksberg held the Constitution requires.
• 2023 — Persistent litigation over withdrawal decisions: Cases involving withdrawal of life-sustaining treatment from patients in persistent vegetative states continue to arise at the state level. The constitutional framework remains Cruzan: courts apply state law surrogate decision-making standards against the constitutional backdrop that competent patients may refuse treatment and states may impose evidentiary requirements for incompetent patients' prior wishes.
• 1997 — Washington v. Glucksberg and Vacco v. Quill: The Court drew on Cruzan's framework to distinguish the constitutionally protected right to refuse treatment from the claim of a right to physician-assisted suicide. Glucksberg held that while Cruzan's liberty interest was genuine, it did not extend to affirmative assistance in dying. The two cases together set the constitutional framework that governs all federal right-to-die analysis. See Washington v. Glucksberg.
• 1990 — Cruzan decided (June 25, 1990) and the Patient Self-Determination Act enacted (November 1990): The decision and the statute together created the modern framework for advance directives and informed consent at end of life. Nancy Cruzan died December 26, 1990, after Missouri courts authorized tube removal based on additional evidence presented after the Supreme Court's ruling. The tragedy of the Cruzan family galvanized national advocacy for advance directive legislation, and within five years nearly every state had enacted comprehensive living will and healthcare proxy statutes.