Health Initiatives for Youth (HIFY) in San Francisco, California, is an innovative organization providing health-related services for and by young people funded in part by the Special Projects of National Significance (SPNS) Program. The HIFY Youth Health Initiative (YHI) is composed of eight youth staff and aims to bring about individual and systemic change, enhance the quality of life for human immunodeficiency virus (HIV)-positive and at-risk young people, and increase the responsiveness and youth sensitivity of organizational and community systems. Comprehensive services have been delivered to 136 young men under 25 years, 33.1% of whom are HIV positive, and 164 young women, of whom 12.2% are HIV positive. In addition, thousands of youth and young adults have received lower-intensity services through dozens of educational workshops and presentations. YHI services are implemented through a comprehensive collection of education, training, and support activities that benefit the youth staff who produce them, along with the participants who benefit from the services provided. These activities include a speaker's bureau, health and advocacy trainings, internships, return-to-work and life skills training, publications, and conferences. Regional and national findings suggest that many youth do not yet comprehend their risk for HIV infection or understand the impact of HIV on their community. In direct response to these needs, HIFY programs inform and encourage access to counseling and testing, and provide meaningful access to adolescent care, treatment, and services.