As the number of Americans at risk of being underserved continues to r
ise, a better understanding of safety-net providers of health care is
needed to help ensure continuing care for the underserved. In this art
icle, the authors have begun the process of defining the role of acade
mic medical centers (AMCs) as a group in the care of those persons mos
t at risk of being underserved-the medically indigent and members of m
inority and poor populations-by quantifying the amount of inpatient ca
re that AMCs provide to these individuals. The study went beyond previ
ous work by using nationally representative sources of data (from 1989
to 1994) and by examining more than one underserved population rather
than only the medically indigent. The study focused on AMCs and other
hospitals in urban areas and excluded hospitals in rural areas. The d
etailed findings confirm previous observations that urban AMCs of all
types provide a large and disproportionate share of care for the medic
ally indigent and the underserved members of minority and poor populat
ions and that members of these populations constituted the majority of
patients cared for in many AMCs in recent years. The findings show th
at the proportion of patients from underserved groups admitted to all
urban hospitals is rising and that this growth is faster among AMCs th
an other hospitals. The authors comment that AMCs, because of their pr
ominent and historical role in caring for the underserved, have the op
portunity to lead efforts to continue such service through innovative
approaches to health care and the prevention of illness. Whether AMCs
can seize this opportunity when confronted by price competition and go
vernment policies that reduce AMCs' capacity to care for the underserv
ed remains to be seen.