Utilization management programs have been widely used to control hospi
tal inpatient costs, but little is known about their potential to cont
rol outpatient costs. Claims data covering a 21-month period beginning
in January, 1990 were analyzed to evaluate the effects of a utilizati
on management program established by an insurance carrier to contain c
osts for durable medical equipment. Four items were targeted for revie
w: seat lifts, transcutaneous electrical nerve stimulator (TENS) 2 and
TENS 4 units, and power-operated vehicles. The program was associated
with significant reductions (P < 0.05) in order requests, supplier ch
arges, and claims payments for three of the four targeted items. Under
the program, the rate of denials increased significantly (P < 0.05) f
or two of the targeted items. Most of the program's cost savings accru
ed from a ''sentinel'' or volume effect, not from an increase in denia
ls. These findings provide further evidence of the cost containment po
tential of utilization management. Focused utilization management prog
rams that target provider groups, patient populations, or service sect
ors experiencing high volume have the greatest chance of achieving cos
t savings.