A healthcare proxy is a person legally authorized to help make medical decisions when a patient cannot understand, communicate, or make those decisions independently. When a loved one loses the ability to speak for themselves, the safest path is to identify the legally recognized decision-maker, locate any advance directive, clarify the person’s known wishes, and work with clinicians on decisions guided by substituted judgment or the patient’s best interests. The issue is common: a study published in JAMA found that 42.5% of older adults experienced a period of medical decision-making incapacity during a serious illness, while only about one-quarter had completed an advance directive.
Healthcare Proxy—Decision-Making Authority and Its Legal Meaning
A healthcare proxy, also called a healthcare agent, medical power of attorney, or healthcare representative, is an individual appointed to make healthcare decisions for another person after that person loses decision-making capacity. The National Institute on Aging describes advance care planning as the process of discussing and documenting future medical preferences, including who should speak for the patient if the patient becomes unable to do so.
The proxy does not ordinarily “take over” merely because a person is elderly, hospitalized, diagnosed with dementia, or unable to speak physically. Capacity is decision-specific and may fluctuate. A patient may be unable to communicate verbally yet still understand choices through writing, gestures, a communication device, or a qualified interpreter. Clinicians generally assess whether the person can understand relevant information, appreciate the likely consequences, reason about options, and communicate a consistent choice.
Healthcare Agent
A healthcare agent is the person named in a valid healthcare power of attorney or similar document. The agent’s authority usually begins when the patient is determined to lack decision-making capacity, although the exact rule depends on state law and the document’s language. The agent should ask the care team what decisions are needed, what benefits and burdens each option presents, and whether the patient may regain capacity.
Advance Directive
An advance directive is a written legal record of a person’s future healthcare preferences. It commonly includes two related parts: instructions about treatments, such as resuscitation or artificial nutrition, and appointment of a healthcare agent. An advance directive is not necessarily a single national form. Requirements for witnesses, notarization, electronic signatures, and accepted forms vary by jurisdiction.
Surrogate Decision-Maker
A surrogate is a person authorized by law to make decisions when no appointed agent is available. State surrogate hierarchies often begin with a spouse or domestic partner and then include adult children, parents, siblings, or other relatives, but the order differs across jurisdictions. Family relationship alone does not always give someone legal authority, especially when relatives disagree or when the patient has a court-appointed guardian.
These related roles lead to the central practical question: what should the decision-maker use as the basis for a choice? The answer generally moves from the patient’s own documented or clearly expressed wishes to carefully reasoned judgments about the patient’s welfare.
Healthcare Proxy—How Decisions Should Be Made
Substituted Judgment
Substituted judgment means attempting to make the decision the patient would have made if able to decide. The proxy should consider conversations, written statements, religious or personal values, prior reactions to medical treatment, and the patient’s attitude toward independence, disability, pain, and life-prolonging treatment. A proxy’s personal preference is not the same as substituted judgment.
Evidence does not have to be a perfectly specific sentence such as “I refuse ventilation.” A consistent pattern of statements can be relevant. For example, a person who repeatedly said they would not want prolonged treatment without a reasonable chance of recovery may be expressing a value that helps guide a decision about intensive care, even if the precise medical situation was never discussed.
Best-Interest Standard
The best-interest standard applies when the patient’s wishes are unknown or cannot reasonably be determined. Decision-makers and clinicians weigh the expected benefits and burdens of treatment, the likelihood of recovery, pain and suffering, functional outcomes, and the patient’s overall values. The goal is not to choose the least expensive option or to preserve life at any cost; it is to make a proportionate decision centered on the patient.
Shared Decision-Making With Clinicians
A proxy makes decisions with the medical team rather than in isolation. Clinicians should explain the diagnosis, prognosis, alternatives, uncertainty, and likely outcomes in understandable language. Palliative care can assist with symptom control and communication at any stage of serious illness; consulting palliative care does not automatically mean that treatment is being stopped.
When the decision concerns cardiopulmonary resuscitation, a clinician may discuss a do-not-resuscitate or do-not-attempt-resuscitation order. A living will may address broad treatment preferences, while a POLST or similar medical order is designed for people with serious illness or frailty and travels with the patient across care settings where recognized. These documents serve different purposes and should not be treated as interchangeable.
Healthcare Proxy—What Families Should Do When Communication Fails
Confirm Capacity and Communication Ability
Ask whether the patient lacks capacity or simply lacks a reliable way to communicate. A speech-language pathologist may evaluate communication methods, while clinicians can address reversible contributors such as medication effects, delirium, infection, dehydration, hearing loss, or uncontrolled pain. Whenever possible, the patient should remain involved in decisions at the highest level of ability.
Locate and Share the Documents
Provide the hospital, primary-care practice, nursing facility, and emergency contacts with copies of the healthcare proxy form, advance directive, POLST or equivalent order, and relevant guardianship papers. Keep the original accessible and tell close relatives who has authority. The National Institute on Aging recommends reviewing advance-care documents after major changes in health, relationships, residence, or personal preferences.
Ask for a Family Meeting
A structured meeting can reduce conflict. Ask the clinician to summarize the medical facts, identify decisions that are urgent, separate certain information from uncertain predictions, and record the patient’s known wishes. If disagreement persists, request an ethics consultation, social-work support, chaplaincy support, or palliative-care consultation. These services can clarify values and process without replacing the legally authorized decision-maker.
Use Guardianship Only When Necessary
Guardianship is a court-supervised arrangement that may be considered when a person lacks capacity and no suitable agent or surrogate can act. It can be slow, expensive, and restrictive, so it is not automatically the best first step. A lawyer experienced in elder law or health law can explain less-restrictive alternatives and the rules in the relevant state.
Healthcare Proxy—Ethical and Legal Boundaries
The landmark U.S. Supreme Court decision Cruzan v. Director, Missouri Department of Health recognized that competent people have a protected liberty interest in refusing unwanted medical treatment, while also allowing states to establish evidentiary standards for decisions made after incapacity. The case helped shape modern attention to advance directives and substituted judgment, but it did not create one uniform procedure for every state.
A proxy generally cannot demand medically ineffective treatment, force a clinician to provide treatment that violates professional standards, or use authority for personal financial benefit. Conversely, clinicians should not dismiss a lawful proxy simply because they disagree with the decision. If a provider believes a requested plan conflicts with professional standards or the patient’s wishes, institutional policies usually require notice, review, and assistance in transferring care when appropriate.
Conflicts may arise when family members disagree about what the patient wanted, when an estranged relative claims authority, or when a document appears incomplete. Do not alter, backdate, or pressure someone to sign a document. Obtain legal and clinical guidance promptly, particularly when surgery, withdrawal of life-sustaining treatment, psychiatric care, or end-of-life decisions are involved.
Healthcare Proxy—A Practical Planning Checklist
The following sequence can help families prepare before a crisis or respond when one has already begun:
- Identify the person’s preferred healthcare agent and a backup agent.
- Discuss goals, unacceptable outcomes, religious beliefs, and views about intensive care, resuscitation, artificial nutrition, and long-term dependence.
- Complete the forms recognized in the person’s jurisdiction and follow signing requirements.
- Give copies to the agent, clinicians, hospital, care facility, and trusted relatives.
- Review the documents after a diagnosis, hospitalization, move, divorce, death of an agent, or major change in values.
- Ask for an interpreter or communication accommodations when language, hearing, speech, or disability creates a barrier.
- Seek an ethics consultation or legal advice when authority, capacity, or family agreement is disputed.
A useful way to visualize the process is a decision pathway: first confirm whether the patient can decide or communicate; next identify the valid agent or surrogate; then review the patient’s instructions and values; afterward compare treatment benefits and burdens with the clinical team; finally document the decision and revisit it as the medical situation changes.
Healthcare Proxy—Conclusion and Next Steps
When a loved one can no longer speak for themselves, a healthcare proxy provides decision-making authority, an advance directive supplies instructions, substituted judgment seeks the patient’s own values, and the best-interest standard guides decisions when those values are unknown. Capacity should be assessed carefully, communication should be supported, and clinicians, families, ethics professionals, and lawyers should be involved when the situation is uncertain or contested.
The broader lesson is that advance-care planning is not only paperwork; it is an ongoing conversation that protects patient autonomy and reduces avoidable conflict. Families should learn the rules in their jurisdiction, complete and share appropriate documents, and revisit them regularly. This information is educational rather than legal or medical advice, and urgent decisions should be discussed with the treating team and a qualified professional.
Sources: Silveira, M. J., Kim, S. Y. H., and Langa, K. M., “Advance Directives and Outcomes of Surrogate Decision Making Before Death,” New England Journal of Medicine, 2010, https://www.nejm.org/doi/full/10.1056/NEJMsa0907901; National Institute on Aging, “Advance Care Planning: Healthcare Directives,” https://www.nia.nih.gov/health/advance-care-planning; National Institute on Aging, “What Are Palliative Care and Hospice Care?” https://www.nia.nih.gov/health/palliative-and-hospice-care; U.S. Supreme Court, Cruzan v. Director, Missouri Department of Health, 497 U.S. 261, 1990, https://supreme.justia.com/cases/federal/us/497/261/; Agency for Healthcare Research and Quality, “Patient and Family Engagement,” https://www.ahrq.gov/patient-safety/patients-families/index.html; National POLST, “POLST Paradigm,” https://polst.org/.”
