464: Acute laryngitis and tracheitis
Excludes:
that associated with influenza (487.1, 488.02, 488.12)
that due to Streptococcus (034.0)
464.2 Acute laryngotracheitis
Laryngotracheitis (acute)
Tracheitis (acute) with laryngitis (acute)
Excludes:
chronic laryngotracheitis (476.1)
464.20: Without mention of obstruction
464.21: With obstruction
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