The United States Senate and the House of Representatives, on October 30, 1990, President George Bush signed S.J. RES. #366 (which became Public Law 101-473) designating March 30, 1989 as the day to celebrate this holiday.[1] The first Doctors’ Day observance was March 30, 1933, in Winder, Ga. The idea came from Eudora Brown Almond, wife of Dr. Charles B. Almond, and the date was the anniversary of the first use of general anesthetic in surgery. (On March 30, 1842, in Jefferson, Ga., Dr. Crawford Long used ether to remove a tumor from a patient’s neck.)
http://en.wikipedia.org/wiki/National_Doctors%27_Day