"Facility", a hospital, clinic, or nursing home licensed under chapter 111, a psychiatric facility licensed under chapter 19 or a home health agency; provided, however, that "facility" shall also include any corporation, professional corporation, partnership, limited liability company, limited liability partnership, authority or other entity comprised of such facilities.
"Health care provider", any of the following health care professionals licensed under chapter 112: a physician, podiatrist, physical therapist, occupational therapist, dentist, dental hygienist, optometrist, nurse, nurse practitioner, physician assistant, chiropractor, psychologist, independent clinical social worker, speech-language pathologist, audiologist, marriage and family therapist or mental health counselor; provided, however, that "health care provider" shall also include any corporation, professional corporation, partnership, limited liability company, limited liability partnership, authority, or other entity comprised of such health care providers.
"Unanticipated outcome", the outcome of a medical treatment or procedure, whether or not resulting from an intentional act, that differs from an intended result of such medical treatment or procedure.
Mass. Gen. Laws ch. 233, § 79L