Wis. Stat. § 632.67

Executing a power of attorney for health care under ch. 155 may not be used to impair in any manner the procurement of a life insurance policy or to modify the terms of an existing life insurance policy. A life insurance policy may not be impaired or invalidated in any manner by the exercise of a health care decision by a health care agent on behalf of a person whose life is insured under the policy and who has authorized the health care agent under ch. 155.