The American Hospital Association has two locations:
Chicago
155 N. Wacker Dr.
Chicago, Illinois 60606
Phone: 312.422.3000
Hours: 9AM-6PM ET, Monday through Friday.
Washington, D.C.
800 10th Street, NW
Two CityCenter, Suite 400
Washington, DC 20001-4956
Phone: 202.638.1100
Hours: 8:30AM-5:30PM ET, Monday through Friday.
AHA can be reached via email at ahahelp@aha.org or contact AHA here.