Implementation of the following HIV behavioral interventions for adult men who have sex with men is recommended based on evidence of their effectiveness in reducing unprotected anal intercourse: individual-level interventions (strong evidence); group-level interventions (strong evidence); and community-level interventions (sufficient evidence). These person-to-person behavioral interventions for men who have sex with men (MSM), can be implemented at the individual, group, and community level; components may include providing information and skill-building to change knowledge, attitudes, beliefs and self-efficacy.