Oregon Revised Statutes Public Health and Safety § 445.020

(1) A person injured by the movement of a motor vehicle is deemed unable to pay the charges for care if it appears that, upon due and diligent search and inquiry, the person, or any other person chargeable by law with the care or support of the person, cannot be found for service of summons, or that, should an action be brought and judgment secured against the person, or against any other person chargeable by law with the care or support of the person, for the amount of the charges, execution thereon would be unavailing.

(2) Indigency of a patient shall be determined as of the date on which the patient becomes unable to pay the cost of the care.