MCMedicalCodingSoftware
J09.X

J09.X: Influenza due to identified novel influenza A virus

Non-billable headerICD-10-CM

J09.X is a non-billable header ICD-10-CM code for influenza due to identified novel influenza a virus. It cannot be billed on its own: choose one of the more specific child codes below.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Avian influenza
  • Bird influenza
  • Influenza A/H5N1
  • Influenza of other animal origin, not bird or swine
  • Swine influenza virus (viruses that normally cause infections in pigs)

Excludes1 inherited from the categories above J09.X

A category’s note binds every code beneath it.

Written on J09: Influenza due to certain identified influenza viruses

  • 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.-)

Other codes that can never be billed with J09.X

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • G94Other disorders of brain in diseases classified elsewhere
  • H67Otitis media in diseases classified elsewhere
  • I41Myocarditis in diseases classified elsewhere
  • J00Acute nasopharyngitis [common cold]
  • J02.9Acute pharyngitis, unspecified
  • J03.9Acute tonsillitis, unspecified
  • J06Acute upper respiratory infections of multiple and unspecified sites
  • J10Influenza due to other identified influenza virus

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

The condition this code belongs to

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead J09.X

4 child codes. Green means billable.

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.