title: Make valve coding an open-and-shut case.
mesh_terms: D006350:Heart Valve Prosthesis / Q000145:classification* / Q000191:economics; D006801:Humans; D007349:Insurance, Health, Reimbursement; D038801:International Classification of Diseases; D012214:Rheumatic Heart Disease / Q000145:classification* / Q000601:surgery; D014481:United States