Nearly 30% of US primary care physicians trained abroad.
Source: http://www.nytimes.com/2010/08/12/health/12chen.html
Only 8.7% of the US are descended from the English (Anglo-Saxons)
Source: http://www.census.gov/prod/2004pubs/c2kbr-35.pdf
That said, the US could easily recruit physicians from Europe including the UK so you may very well get more Anglo-Saxon physicians!
http://www.ndtv.com/indians-abroad/india-biggest-exporter-of...
http://www.ndtv.com/indians-abroad/india-biggest-exporter-of...