Haw. Rev. Stat. § 663-1.4
In any case brought by one health care professional against another for defamation, damage to reputation, or any other loss resulting from information provided by the second health care professional in any situation relating to a medical peer review proceeding, including the providing of information that may lead to the initiation of such a proceeding, if the second health care professional substantially prevails in the action, and if the action brought by the first health care professional was frivolous, unreasonable, without foundation, or in bad faith, then the court, at the conclusion of the action, shall award to the second health care professional the cost of defending against the action, including a reasonable attorney's fee.
HRS § 663-1.4
Health care peer review, see chapter 671D. Vexatious litigants, see chapter 634J.