We contend that the full consequences of managed care for American med
icine and health care professionals can be more fully understood if st
rategies for managing care are identified-in particular, strategies fo
r the administrative oversight of professional decision making. In thi
s paper we apply this perspective to the study of third-party utilizat
ion review, making use of a national survey of firms contracting to pr
ovide prior authorization for hospitalization in 1992. Survey data sug
gest that (1) existing approaches to utilization review differ greatly
among review firms; (2) review practices that might improve agency an
d accountability seem to be overlooked by most review firms; and (3) a
large number of review firms employ practices that undermine professi
onal autonomy in seemingly inappropriate ways.