Me. Rev. Stat. tit. 32, § 3293

A physician licensed under this chapter who is a member of a utilization review committee, medical review committee, surgical review committee, peer review committee or disciplinary committee that is a requirement of accreditation by the Joint Commission on Accreditation of Hospitals or is established and operated under the auspices of the physician's respective state or county professional society or the Board of Licensure in Medicine is immune from civil liability for undertaking or failing to undertake an act within the scope of the function of the committee.