Haw. Rev. Stat. § 386-171

Any person who is injured in performing service for the State or any county in any voluntary or unpaid capacity under the authorized direction of a public officer or employee, and who has not secured payment of the person's hospital and medical expenses from the State or the county under any other provision of law and has not secured payment thereof from any third person, shall be paid the person's reasonable hospital and medical expenses under this chapter.