Acute obstructive laryngitis [croup]

• 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)

• 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)

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).

code (B95-B97) to identify infectious agent.

• , influenza, if present, such as:
• influenza due to identified novel influenza A virus with other respiratory manifestations (J09.X2)
• influenza due to other identified influenza virus with other respiratory manifestations (J10.1)
• influenza due to unidentified influenza virus with other respiratory manifestations (J11.1)

chronic obstructive pulmonary disease with acute lower respiratory infection (J44.0)