Mo. Rev. Stat. § 404.835: Execution of durable power of attorney not to be required.

1. It shall be unlawful for a physician, nurse or other individual who is a health care provider or an employee of a health care facility, hospital, nursing facility, residential care facility or other health care facility to require an individual to execute a durable power of attorney for health care as a condition for the provision of health care services or admission to a health care facility.

2. It shall be unlawful for an insurance company authorized to transact health insurance business in this state, nonprofit health care service plan, health maintenance organization, or other similar person or entity who contracts or agrees to the provision of health care benefits to require an individual to execute a durable power of attorney for health care as a condition to being insured or to receive benefits for health care services.