Dr. John C. K. Yu, 52, a physician and surgeon in Rockville since 1960, died Wednesday at Suburban Hospital in Bethesda following abdominal surgery.

A native of Shanghai, China, Dr. Yu earned a medical degree there before coming to Washington in 1949. From 1950 to 1953, he was a resident surgeon at the old Garfield Memorial Hospital here.

He briefly practiced in Rockville, and then served as a captain in the Army Medical Corps for two years. He then moved to Pittsburgh where he was on the staffs of the University of Pittsburgh Medical Center and a Veterans Administration hospital there.

In 1960, Dr. Yu returned to Rockville to resume his medical and surgical practice there. He had been associated with Washington Hospital Center, Suburban Hospital, Holy Cross Hospital and Montgomery General Hospital.

He was a member of the American Medical Association, the Montgomery County Medical Society, the D.C. Medical Society and the Southern Medical Society. He also was a diplomate of the American Board of Surgery.

Survivors include his wife, Helen, and two daughters, Janet and Elizabeth, of the home in Potomac, and three sisters, Florence Leung, of Rockville, Amy Lowe, of Los Angeles, Calif., and Linda Kwei, of Ottawa, Ontario.