I beg pardon, but you absolutely cannot work as a physician in the US based solely on RCP membership. Even an RCP member from the UK would still need to pass all of the USMLE exams (Steps 1, 2cs, 2ck and 3), REPEAT his or her residency training, and THEN s/he could work in the US. At best, a board-certified UK physician would receive a year off of the residency, and even that is not guaranteed.
It's ridiculous, yes, but it's the system in the States.

Originally Posted by
futurembbs
i would stick with the UK and try to get membership with the Royal College of Physicians - it's a passport to working abroad and in the USA.
"To array a man's will against his sickness is the supreme art of medicine."
- Henry Ward Beecher