This study examines the effects of a mental health carve-out on a sample of
continuously enrolled employees (N = 1,943) over a four-year time frame (1
990-1994). The article presents a health care services utilization model of
the effect of the carve-out on outpatient mental health use, cost, and sou
rce of payment in the three years post implementation relative to the year
prior to the carve-out model. In the first three years of the carve-out, th
e likelihood of employees seeking mental health care increased in significa
nt part because of the carve-out. For the outpatient mental health services
user the carve-out was not associated with the level of mental health serv
ices received. The carve-out was significantly associated over time with a
reduction in the patient's and employer's mental health costs. This effect
was more pronounced in the second and third years of the carve-out. The art
icle explores the policy implications of these and other findings.