Background. Counseling and testing for HIV infection is performed at m
any sites, including drug treatment centers. The actual cost of provid
ing HIV counseling and testing at drug treatment sites, based upon emp
irical data collection, has not been reported. The average lifetime me
dical cost for an HIV-infected individual is $56,000. This study provi
des both a systematic method for estimating HIV counseling and testing
costs and actual cost results. These results can be compared with the
medical costs associated with HIV infection. Methods. At three public
ly funded methadone treatment centers, we collected cost data on the p
rovision of HIV counseling and testing. We obtained provider service t
imes for HIV counseling and testing components, provider salaries and
fringe rates, laboratory costs, and support costs at each center. Resu
lts. The average cost of HIV counseling and testing is $215 per client
entering HIV counseling and testing and $341 per client made aware of
HIV serostatus. The total direct cost of providing HIV counseling and
testing is $41 for an HIV-negative client who completes the process a
nd $57 for an HIV-positive client; the support costs add an additional
$175 per client. Conclusions. Existing methadone maintenance treatmen
t clinics planning to add HIV counseling and testing can expect costs
in a range of $189 to $242 per person entering HIV counseling and test
ing (1991 dollars), Using an average lifetime cost of HIV infection ($
56,000) and the average cost per person entering HIV counseling and te
sting ($215), if more than 1 person in 260 changes his or her behavior
to prevent one additional HIV infection, the ratio of medical care sa
vings to costs of counseling and testing would be greater than 1.0, a
cost-saving prevention strategy.