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J21 Acute bronchiolitis

ICD-10-CM category J21 sits in Chapter 10 (Diseases of the respiratory system, J00-J99). It contains 4 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Billable codes in J21

CodeDescription
J21.0Acute bronchiolitis due to respiratory syncytial virus
J21.1Acute bronchiolitis due to human metapneumovirus
J21.8Acute bronchiolitis due to other specified organisms
J21.9Acute bronchiolitis, unspecified

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