This article focuses on the factors that affect the availability, accessibility, and opportunity of effective treatment for the adjudicated adolescent drug user The social and developmental context of "drug abuse" and its treatment in adolescents, and particularly in adjudicated adolescents, is reviewed and compared with that in adults. Selected health services research findings on this population are discussed in terms of the effectiveness of delivering treatment services; the organization, management, and financing of services; and adoption of best practices (technology transfer).