A healthcare power of attorney (HCPOA) — also called a healthcare proxy, healthcare agent, or durable power of attorney for healthcare depending on the state — designates a person to make medical decisions on behalf of a patient who lacks decision-making capacity. The designated agent speaks for the patient; they do not override the patient while the patient retains capacity.
When no healthcare agent has been designated and a patient loses capacity, surrogate decision-making defaults to a state-defined hierarchy — which varies and may not reflect the patient's actual preferences.
CLINICAL PRINTABLE
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A clinical reference for this topic is in development.
1 · Terminology
Healthcare Power of Attorney (HCPOA)
A legal document designating a person to make healthcare decisions when the patient lacks capacity. Also called a durable power of attorney for healthcare.
Healthcare Proxy / Healthcare Agent
The person designated to make decisions — the individual named in the HCPOA document. Terms vary by state.
Healthcare POA vs Financial POA
A financial power of attorney grants authority over financial and legal matters — it does not extend to healthcare decisions. These are separate legal instruments.
2 · Decision-Making Capacity vs Legal Competency
- Decision-making capacity is a clinical determination made by the treating clinician — it is not the same as legal competency, which is a judicial determination.
- Capacity is decision-specific and can fluctuate — a patient may have capacity for some decisions but not others, or may have capacity at some times but not others.
- The four elements of decision-making capacity: understanding the information, appreciating how it applies to their situation, reasoning through the options, and communicating a consistent choice.
- When capacity is uncertain, a formal capacity evaluation — including psychiatry or ethics consultation when appropriate — may be warranted.
3 · Surrogate Decision-Making
Substituted Judgment
The surrogate attempts to make the decision the patient would have made, based on the patient's known values, preferences, and prior statements. This is the preferred standard when the patient's preferences are known.
Best-Interest Standard
When the patient's preferences are unknown, the surrogate makes the decision that a reasonable person in the patient's situation would likely prefer, weighing benefits and burdens of treatment.
When No Agent Is Designated
Surrogate decision-making defaults to a state-defined hierarchy — typically spouse, adult children, parents, siblings, and then other relatives or close friends. The order and specifics vary by state.
4 · Family Disagreement
- Family disagreement about medical decisions is common and can be clinically and ethically complex.
- Early and clear communication about the patient's known preferences — and the legal authority of the designated agent — can reduce conflict.
- Palliative care consultation and ethics consultation are appropriate resources when family conflict is affecting care.
Bottom Line
A healthcare agent's authority activates when the patient lacks decision-making capacity — not before.
EVIDENCE & REFERENCES
- Appelbaum PS. Assessment of Patients' Competence to Consent to Treatment. N Engl J Med. 2007;357(18):1834-1840. doi:10.1056/NEJMcp074045
- Silveira MJ, Kim SY, Langa KM. Advance Directives and Outcomes of Surrogate Decision Making before Death. N Engl J Med. 2010;362(13):1211-1218. doi:10.1056/NEJMsa0907901
- Torke AM, et al. Scope and Outcomes of Surrogate Decision Making Among Hospitalized Older Adults. JAMA Intern Med. 2014;174(3):370-377. doi:10.1001/jamainternmed.2013.13315