Carcinoma in situ of middle ear and respiratory system Use additional code to identify:exposure to environmental tobacco smoke (Z77.22)exposure to tobacco smoke in the perinatal period (P96.81)history of tobacco dependence (Z87.891)occupational exposure to environmental tobacco smoke (Z57.31)tobacco dependence (F17.-)tobacco use (Z72.0)Excludes1melanoma in situ (D03.-)