42 CFR § 456.122 - Evaluation criteria for admission review.
The UR plan must provide that -
(a) The committee develops written medical care criteria to assess the need for admission; and
(b) The committee develops more extensive written criteria for cases that its experience shows are -
(1) Associated with high costs;
(2) Associated with the frequent furnishing of excessive services; or
(3) Attended by physicians whose patterns of care are frequently found to be questionable.