Whether the Fourteenth Amendment protects a competent person's liberty interest in refusing life-sustaining medical treatment, including artificial nutrition and hydration.
Holding
The Court assumed, without definitively deciding, that a competent person has a constitutionally protected liberty interest in refusing lifesaving hydration and nutrition.
Reasoning
The Court located the claimed interest in the Due Process Clause's protection of liberty, rather than in a broad constitutional right of privacy. Common-law doctrines of bodily integrity and informed consent strongly recognize that a competent adult generally controls what is done to her body, including the decision to refuse medical treatment.
Prior decisions involving compulsory vaccination, involuntary medication, bodily searches, and medical confinement supported the proposition that unwanted bodily intrusions implicate important liberty interests. The Court therefore accepted, for purposes of resolving this case, that forced life-sustaining treatment would burden a competent person's protected liberty interest.
That premise did not itself resolve Nancy Cruzan's case. Nancy was incompetent and could not make an informed, voluntary choice; the central constitutional question was instead what procedures Missouri could require before a surrogate could exercise a treatment-refusal decision on her behalf.