Other respiratory disorders 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)Excludes1newborn apnea (P28.4-)newborn sleep apnea (P28.3-)Excludes2apnea NOS (R06.81)sleep apnea (G47.3-)