ICD-10 Code for Influenza

The default ICD-10-CM 2027 code for influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus) is J11.1 – Influenza due to unidentified influenza virus with other respiratory manifestations. More specific codes depend on the details documented, as listed in the official index (22 codes, 21 billable).

Main code
J11.1 – Influenza due to unidentified influenza virus with other respiratory manifestations
Billable
Yes

Index entries for Influenza

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.