2021 ICD-10-CM Codes for Influenza due to certain identified influenza viruses (J09)

Instructional Notations

Type 1 Excludes Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

  • influenza A/H1N1 J10
  • influenza due to other identified influenza virus J10
  • influenza due to unidentified influenza virus J11
  • seasonal influenza due to other identified influenza virus J10
  • seasonal influenza due to unidentified influenza virus J11