The Boston HAPPENS program is an innovative model of care for street youth and youth at high risk for HIV which has been providing services for 2 years. HIV testing is a major focus of the program. Voluntary confidential and anonymous HIV testing is available at the 8 program sites. This report describes clients who are accessing these services and evaluates whether youth at highest risk are using testing services. 1576 clients have been contacted by the program, 1044 (66%) of whom provided enough information for this report. Since 90% came from 3 of the 8 sites, analyses was restricted to these 942 subjects. 60% were female, 54% white, 19% black, 15% hispanic, 4% asian, 3% multi-ethnic. Mean age=21.1+2.9yrs, range 10.8 - 31.5 yrs. 4% (N=36) self-identified as gay/lesbian or bisexual (g/l/b). 176 had had an STD, 49 substance abuse problems. 24 reported survival sex, 16 sex with an injection drug user (IDU), 13 sex with an HIV+ partner. 14 had been pregnant, 4 had shared needles. 23 were HIV+, all of whom knew their HIV status before contacting the program, 2 of whom were retested by the program. 20% (N=186) reported previous HIV testing. Those who were older (p<0.001), g/l/b(p=0.001), white (p<0.0001) and had problems with substance abuse (p=0.001) were more likely to have been tested in the past. Those who had had an STD were less likely to have been previously tested (p<0.0001). 52% received pretest counseling, 48% received HIV testing, and 28% received posttest counseling through the program. No new cases of HIV infection have been diagnosed through the program's HIV testing efforts. Those who received testing were more likely to have been tested in the past (p<0.001), and be white (p<0.001). Those who had had an STD (p<0.001), sex with an IDU(p=0.003), survival sex (p=0.001), or substance use problems (p=0.04) were less likely to receive testing. These data indicate that though teens are using HIV testing services, high risk youth are not accessing HIV testing despite targeted, youth specific, developmentally appropriate and culturally sensitive outreach and intervention efforts. More research on the barriers to using HIV testing among teenagers needs to be performed so that youth at highest risk can and will access services.