Hyman Irving Biegeleisen (June 4, 1904 New York City – May 3, 1991, died at his home in Boca Raton, Florida) was an American physician and pioneer of phlebology. In 1964, he founded the Phlebology Society of America (now incorporated into the American College of Phlebology). He was one of the first doctors in the United States to use injection as a method of treating varicose veins, and coined the term sclerotherapy to describe the treatment.