Dr. Herbert P. Ramsey, 90, an obstetrician and gynecologist in Washington for more than half a century before retiring in 1975 and who also had been a clinical professor at George Washington University and a president of the D.C. Medical Society, died of arteriosclerosis April 6 at his home in Washington.

Dr. Ramsey chaired the departments of obstetrics and gynecology at the old Garfield Hospital and at the Washington Hospital Center. He had been affiliated with George Washington University Hospital, the Columbia Hospital for Women, and the old Gallinger Municipal Hospital, and had served on advisory bodies at D.C. General Hospital.

He was a past chairman of the D.C. Public Health Advisory Council and a past president of the Washington Gynecological Society. He served in the American Medical Association's House of Delegates from 1947 to 1952. He was a life fellow of the American College of Surgery, a life member of the Pan American Medical Society, and a diplomate of the American Board of Obstetrics and Gynecology.

Dr. Ramsey was a native of Washington and a 1912 graduate of Eastern High School. He graduated from George Washington University in 1916 and its medical school in 1920. He was an Army veteran of World War I. After the war, he interned at Garfield and served a residency at the Columbia Hospital for Women. He was chief resident at George Washington University Hospital.

From there, Dr. Ramsey worked at a hospital in Central America and was chief of the obstetrics and gynecology department at Soochow Hospital in China. He returned here and began his private practice in 1927. After his formal retirement in 1975, he was a consultant to the Washington Hospital Center.

Dr. Ramsey was a member of the Cosmos Club, the old Corinthian Yacht Club and the Columbia Historical Society.

Survivors include his wife of 62 years, the former Margaret Lillian Frost of Washington; two daughters, Barbara R. Pierrot of Washington, and Marjorie R. Gatley of Grand Junction, Colo.; two sisters, Olive Aldridge of Chevy Chase, and Margaret Fisher of Gaithersburg; six grandchildren, and seven great-grandchildren.