Data on 343 patients admitted to the Partial Hospitalization Service of the Lincoln Community Mental Health Center, New York City, over a two-year period indicate that the presence of this service cut admissions to the state hospital by two-thirds. The pressures that exist in an urban slum area in which no inpatient psychiatric facility is available undoubtedly played a role in producing these results. The authors hope this program will serve as a model alternative to inpatient services for similar slum areas throughout the nation.Abstract Teaser