Diseases of the Respiratory System

**Notes:** - When a respiratory condition is described as occurring in more than one site and is not specifically indexed, it should be classified to the lower anatomic site (e.g. tracheobronchitis to bronchitis in J40).

**Excludes2:** - certain conditions originating in the perinatal period (P04-P96) - certain infectious and parasitic diseases (A00-B99) - complications of pregnancy, childbirth and the puerperium (O00-O9A) - congenital malformations, deformations and chromosomal abnormalities (Q00-Q99) - endocrine, nutritional and metabolic diseases (E00-E88) - injury, poisoning and certain other consequences of external causes (S00-T88) - neoplasms (C00-D49) - smoke inhalation (T59.81-) - symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

**Use additional code:** - code, where applicable, 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)