Methamphetamine, a drug used at alarming rates among gay/bisexual males in the West, is often combined with sexual activities, thereby increasing HIV-related risks in an already high-risk group. Findings from 68 gay/bisexual men seeking treatment for methamphetamine dependence in Hollywood, California were analyzed to predict HIV serostatus based on demographic, drug use, or sexual behavior variables. Results showed that more HIV-infected participants than non-infected men reported medical problems (97.6% versus 46.2%; X2 = 24.7, df = 1, p < .0001), histories of genital gonorrhea (59.5% versus 26.9%; X2 = 6.9, df = 1, p < .01), use of injection methods (45.2% versus 19.2%; X2 = 4.8, df = 1, p < .03), and more sexual partners with unprotected receptive anal intercourse in the 30 days prior to intake (5.9 versus 0.7; separate t = 3.5, df = 43.7, p < .001). More non-infected participants (19.2%) reported suicidal thoughts than HIV-infected men (0%; X2 = 4.8, df = 1, p < .03). Discriminant function analysis correctly classified 74.6% of cases into serostatus groupings based on presence of suicidal thoughts, history of gonorrhea, number of sexual partners with unprotected receptive anal intercourse and prior methamphetamine treatment. Findings provide information that may prove helpful in tailoring culturally relevant treatment and prevention messages.