How Many US MDs Are Citizens and How Many Came From Other Countries? About 72% of the physicians who answered the survey were born in the United States and approximately 8% came here as children. Nearly 20% of the physicians who responded came to the United States as adults, which is slightly lower than the 26.3% rate reported by the Migration Policy Institute in 2007. In this report, Asia was the origin of the greatest proportion of foreign-born physicians -- around 22% -- followed by Europe/Canada/Oceania at about 16%. Africa contributed about 12% and Latin America 6%. Source
