Dr. Clyde P. Reeves, 72, a physician who maintained a general family practice in Washington for more than 40 years, died of cancer Sunday in a hospital in Myrtle Beach, S.C.

Dr. Reeves was a native of Chaptico, Md., and a 1933 graduate of George Washington University's medical school. He served an intership at Sibley Memorial Hospital and a residency at the Columbia Hospital for Women before beginning his practice in 1935.

He had been president of both the George Washington University Medical Society and the Washington Medical and Surgical Society. He was a life member of the American Medical Association and belonged to both, the Medical Society of the District of Columbia and the Southern Medical Society. He also was a member of the Elks.

Dr. Reeves was a long-time resident of Arlington and lived for a year in Annapolis before retiring to Myrtle Beach, S.C., in 1978.

He served with the Army in Europe during World War II.

Survivors include his wife, Opal, of Myrtle Beach, and a sister, Elizabeth Harding of El Paso, Tex.

The family suggests that expressions of sympathy be in the form of contributions to the American Cancer Society, or to a charity of one's choice.