The governing body of each licensed hospital or outpatient surgical center shall require that physicians admitted to practice in the hospital or center organize into committees or other organizational structures to review the professional practices within the hospital or center for the purposes of reducing morbidity and mortality and for the improvement of the care of patients provided in the institution. Such review shall include the nature, quality and necessity of the care provided and the preventability of complications and deaths occurring in the hospital or center. Such review need not identify the patient or doctor by name but may use a case number or some other such designation.
A.R.S. § 36-445