Section 4657.
Cal. Probate Code - PROB § 4657.
in effectA patient is presumed to have the capacity to make a health care decision, to give or revoke an advance health care directive, and to designate or disqualify a surrogate. This presumption is a presumption affecting the burden of proof.
Source: CA Legislative Counsel Bulk DataURL: https://downloads.leginfo.legislature.ca.gov/pubinfo_2025.zipFetched: 6/27/2026