Medicare diagnostic and surgical study.
D004194:Disease / Q000145:classification*; D006801:Humans; D007341:Insurance / Q000592:standards*; D007344:Insurance Claim Reporting / Q000592:standards*; D008499:Medical Records / Q000592:standards*; D006278:Medicare; D010865:Pilot Projects; D013514:Surgical Procedures, Operative / Q000145:classification*; D014481:United States