ICD-10-CM 2027
ICD-10 code for avian flu
Influenza due to identified novel influenza A virus with other respiratory manifestations
From the official ICD-10-CM alphabetic index entry “Flu › avian”. Page updated September 29, 2026.
About coding avian flu
The ICD-10-CM code for avian flu is J09.X2 (Influenza due to identified novel influenza A virus with other respiratory manifestations).
Within J09.X, choose J09.X2 (with other respiratory manifestations) only when documentation doesn't support a more specific option: with pneumonia (J09.X1), with gastrointestinal manifestations (J09.X3) and with other manifestations (J09.X9).
Use an additional code, if applicable, for associated: pleural effusion (J91.8) and sinusitis (J01.-).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Common questions about avian flu ICD-10 codes
What is the ICD-10 code for avian flu?
- J09.X2 — Influenza due to identified novel influenza A virus with other respiratory manifestations.
Is J09.X2 billable?
- Yes. J09.X2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J09.X2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J09.X2 as a principal diagnosis.
Is J09.X2 a CC or MCC?
- No. J09.X2 is neither a CC nor an MCC under MS-DRG v44.0.