This report examines data collected through the American Medical Associatio
n Annual Survey of Graduate Medical Education Programs for 1999-2000 and co
mpares these data with similar data collected during the past several years
. The number of resident physicians enrolled during 1999-2000 was 606 more
than during the previous year; graduates of US osteopathic medical schools
(USDOs) had the greatest proportional increase (5.2%), The number of physic
ians entering graduate medical education (GME) for the first time in 1999-2
000 (n = 22 320) also increased, with the number of USDOs increasing the mo
st, by 14.5%, followed by international medical graduates (IMGs) at 6.5%, B
etween academic years 1998-1999 and 1999-2000, the number of physicians wit
h prior US GME occupying first-year positions for which prior GME was not r
equired (GY1 positions) increased by more than 300 (12%), Compared with gra
duates of US allopathic and osteopathic medical schools (USMGs), IMGs were
more likely to seek additional training after graduating from a program. Ho
wever, this was not true of IMGs who were US citizens or who had been natur
alized or had permanent residency status. For the second year in a row, the
number of white graduates of US allopathic medical schools (USMDs) enterin
g GME has declined (2.0%), while the number of Hispanic GY1 USMDs has incre
ased by 10.5%. The number of Asian CY1 USMDs increased steadily (11.0%) but
the number of blacks decreased by 7.1% from 1998-1999, Growth continues, b
oth in numbers and in heterogeneity of physicians in training, and must be
considered in the future development of policy to guide US GME.