Dr. Samuel Thompson Adams, 65, a retired physician who practiced family medicine for 35 years in The Plains, Va., died of cardiac arrest Aug. 13 at Fauquier Hospital in Warrenton.

Dr. Adams, a native of The Plains, graduated from the University of the South in Sewanee, Tenn., and took his medical degree at the University of Virginia. During World War II he was an Army surgeon in Europe.

In 1946, he returned to The Plains and began a medical practice that he continued until 1981, when he retired. In 1950, he built The Plains Clinic.

Dr. Adams was a charter member of the staff of Fauquier Hospital and a member of the staffs at Winchester Memorial and the Front Royal hospitals and at other institutions.

He was a charter member of the Fauquier Lions Club and served on The Plains Town Council, the University of Virginia Medical School Advisory Board and the board of the Oak Springs Nursing Home in Warrenton. He was a member of the American and Southern medical associations.

Survivors include his wife, Celeste Tarbet Adams of The Plains; two sons, Samuel T. Jr. of Berryville, Va., and Harbert L.R. of Leesburg, Va.; a daughter, Celeste Marian of Washington; four brothers, James T. of Upperville, Va., Thomas T. of Athens, Ga., John B. of The Plains, and William B. of Cedar Bluff, Va.; two sisters, Annie Pauline Cummings of Washington, and Mary (Mamie) Adams Woodward of Suffolk, Va.; and two grandchildren.