Dr. Charles William Ordman, 65, a Washington internist and surgeon since 1944 and a former assistant professor of medicine at Georgetown University School of Medicine, died Sunday at his Washington home. He had a heart ailment.

Dr. Ordman served at the National Naval Medical Center in Bethesda and aboard the USS Prairie in the Atlantic during World War II. After he was injured in the line of duty in 1942, he went to Harvard University Medical School as a research fellow and instructor for two years. During this time he also was acting clinical director of the infectious disease laboratory at New England Deaconess Hospital in Boston. i

In late 1944, he moved to Washington and began a private medical practice. He maintained homes in Washington and Flint Hill, Va.

Dr. Ordman was an honorary member of the Washington Hospital Center's board of trustees and served as chairman of the hospital center's department of medicine in 1961, 1962, 1964 and 1965. He was president of the medical staff from 1966 to 1968.

In 1976, he received a gold-headed cane from the Washington Hospital Center for excellence in medical practice and teaching.

Dr. Ordman was born in New York City. He graduated cum laude from Yale University Medical School in 1939.

He served residencies in Massachusetts and San Francisco before receiving his Navy commission in World War II.

Dr. Ordman was a life member and fellow of the American College of Physicians. He was awarded a certificate for meritorious service from the Office of Scientific Research and Development for his research work at Harvard.

His marriage to the former Barbara Goodwin ended in divorce.

Survivors include his wife, the former Neva Jewett McLean of Washington; a son, John A., of Panama; a sister, Sheilah Sklar of Morristown, N.J., and two grandchildren.