South Dakota Health Care Consent: Who Decides When No POA Exists

Your parent lands in the ER after a fall. The doctor needs authorization for surgery. Nobody has a healthcare power of attorney, and your parent can't speak for themselves. What happens now?

South Dakota has a statutory answer, but it comes with gaps that catch families off guard.

The Default Surrogate Hierarchy Under SDCL 34-12C-3

When a patient lacks capacity and has no valid advance directive, South Dakota law creates a ranked list of default decision-makers. The hospital works down this list until it finds someone available and willing:

1. A court-appointed guardian with healthcare authority
2. The patient's spouse (not legally separated)
3. An adult child (18 or older)
4. A parent
5. An adult sibling
6. A close friend who has maintained regular contact and is familiar with the patient's values and beliefs

If your parent has no spouse or guardian, an adult child is in the default surrogate tier. The statute does not designate the eldest child as the sole decision-maker; when multiple adult children are available, they share the same priority level.

But there's a limit built into this authority that most families never hear about until it matters.

The Life-Sustaining Treatment Gap

Default surrogates under SDCL 34-12C-3 cannot authorize withholding or withdrawing life-sustaining treatment — including artificial nutrition and hydration — unless a valid healthcare power of attorney specifically addresses those decisions under SDCL 59-7-2.7.

This means a default surrogate can consent to surgery, approve a medication change, or authorize a transfer between facilities. But if the situation escalates to comfort-only care or removing a ventilator, the default hierarchy does not authorize that decision.

At that point, the family may need to locate a previously executed DPOA-HC or seek court intervention; the circuit court can address a health-care decision when no person is available to consent or when same-tier decision-makers do not agree.

What Default Surrogates Cannot Do

Beyond the life-sustaining treatment restriction, the statute creates two more authority gaps:

Financial decisions are off the table. A default healthcare surrogate has no legal authority to manage the parent's bank accounts, sign admission agreements that involve financial guarantees, or make any decisions about property. If the assisted living center wants someone to guarantee payment, the healthcare surrogate hierarchy doesn't help. That requires either a durable financial power of attorney or a court-appointed conservator.

Multiple surrogates at the same tier create conflict. When two or more adult children share the same priority level, the statute does not designate an eldest child or other tiebreaker. If same-tier decision-makers do not agree, the circuit court can intervene, which may delay treatment decisions and add court and attorney costs.

When the Default Hierarchy Actually Works

The statutory surrogate system handles routine medical situations reasonably well. If your parent needs a hip replacement, a medication adjustment, or a transfer from the hospital to a skilled nursing facility for rehab, the default hierarchy gives the highest-priority available family member clear authority to consent.

Dakota at Home can start the LTSS intake process. When you call 1-833-663-9673, ask the specialist what authority or documentation is needed to act on the care plan.

How to Close the Gaps Before a Crisis

The cheapest fix is always the one you do before capacity is gone:

Execute a healthcare power of attorney now. South Dakota's advance directive packet (available through CaringInfo) includes a DPOA-HC form that specifically addresses life-sustaining treatment decisions. Your parent must have capacity at the time of signing. The signature must be witnessed by two adult individuals or notarized, and the agent named in the document should be someone who lives close enough to respond quickly — the default hierarchy's "close friend" tier isn't a reliable fallback for time-sensitive ICU decisions.

Name a financial POA in the same session. The healthcare surrogate hierarchy does nothing for financial authority. A separate durable power of attorney for finances, executed while your parent still has capacity, eliminates the need for a conservatorship proceeding later. In South Dakota, banks sometimes resist accepting POA documents — having the document reviewed by the financial institution before a crisis develops avoids a fight at exactly the wrong moment.

Document your parent's wishes in writing. Even if the surrogate hierarchy applies, knowing whether your parent wants aggressive treatment or comfort care removes the guesswork. A written statement signed by the parent, even if informal, gives the surrogate evidence of the patient's preferences that holds weight with providers.

The South Dakota Care Decision guide includes a Legal Authority Inventory worksheet that maps which documents your family has, which are missing, and which gaps create the highest risk — particularly for families with multiple siblings or parents who live hours from the nearest hospital. Get the complete toolkit.

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