Probate: other; designation of a patient surrogate for health care decisions; allow. Amends 1998 PA 386 (MCL 700.1101 - 700.8206) by adding pt. 6 to art. V & repeals sec. 66h of 1939 PA 280 (MCL 400.66h). TIE BAR WITH: HB 4419'25

Added adult children, parents, adult siblings, and other caring individuals to the priority list of surrogate decision-makers, expanding who can make healthcare decisions when a patient is incapacitated.

Allows patients to disqualify specific individuals from acting as surrogates through written or verbal communication, with the disqualification recorded in medical records.

Added restrictions preventing surrogates who have pending criminal actions involving the patient or personal protection orders from serving as surrogates.

Requires surrogates to sign an acceptance of authority form that outlines their responsibilities and limitations, including restrictions on making decisions that would result in patient death.

Mandates that surrogates communicate their assumption of authority to family members and provide written notice if acting for more than 7 days.

Requires surrogates to act in accordance with fiduciary standards and prioritize the patient's known treatment preferences and best interests.

Added adult siblings to the priority list of individuals who can act as surrogate decision makers when no other designated person is available, expanding the pool of eligible family members.

Updated the definition of 'surrogate' to clarify that it includes individuals authorized to make health care decisions for patients.

Changed document version from House substitute (H-2) to Senate substitute (S-3), reflecting legislative processing and amendments made during Senate review.