Our experience with 20 cases of nonoperative retained biliary tract stone extractions is presented.† An improved instrumentation technique through a steerable catheter under roentgenologic control is described. A second surgical intervention for stone removal became unnecessary in all but 1 of our 20 patients undergoing this new roentgenologic technique. All 19 patients have remained asymptomatic after stone removal. The technique was unsuccessful in 1 patient due to our inability to catheterize a tortuous T-tube drain tract. Compared to re-operation or attempts of stone dissolution, extraction under roentgenologic control in the ambulatory patient is the method of choice for the treatment of retained biliary tract stones.