Who can consent for dental treatment when an adult patient lacks capacity in California?

Look for the lawful surrogate path, not family convenience. California cares who has legal authority, and the emergency exception is narrow.

Last updated: 2026-09-29.

Direct answer

Recorded surrogates, agents under advance directives or powers of attorney, conservators, and other lawful surrogate paths matter more than who is standing nearby.
Spouse status alone is not the same thing as legal authority.
Use the emergency exception only when the patient lacks capacity, delay would materially increase serious harm, and no lawful surrogate is reasonably available.

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Common trap

Do not let a convenient family member substitute for a legally authorized decision-maker unless the facts establish the proper surrogate lane.

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Parent guide

How do California consent rules work for minors and patients with impaired capacity?

Use this guide when you need the California consent framework for minors, surrogate decision-makers, and informed-consent duty.

Primary sources

A52 Probate Code sections 4683, 4711, and 4712 plus AB 2338 surrogate decisionmaker framework for adults lacking capacity
A49 Cobbs v. Grant (1972) California informed-consent material-risk and reasonable-patient framework
A50 Truman v. Thomas (1980) duty to disclose material risks of refusing recommended testing or treatment

Related Q&A

Who can consent for a minor's dental treatment in California?

Do not assume every accompanying adult can consent. California separates ordinary parental authority, self-consent lanes, emancipation, and caregiver-affidavit authority.

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What changed in California dental sedation and anesthesia permits in 2025?

The 2025 changes updated permit names, staffing expectations, and operational framing, so older sedation shorthand is unreliable.

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