Dr. William Clapp got his medical degree from University of Minnesota Medical School and completed his internship in 1985 at University of Wisconsin. He then did the residency at University of Wisconsin and completed his fellowship at University of Iowa Hospitals & Clinics in 1993. Dr. Clapp is board certified in internal medicine, pulmonary disease and critical care medicine and is also a NIOSH Certified B-Reader. He is affiliated with John H. Stroger Jr. Hospital of Cook County.