J09.X3Influenza due to identified novel influenza A virus with gastrointestinal manifestations

J09.X3 is the ICD-10-CM diagnosis code for influenza due to identified novel influenza A virus with gastrointestinal manifestations. It belongs to category J09 (influenza due to certain identified influenza viruses), block J09-J18 (influenza and pneumonia) and chapter 10 (diseases of the respiratory system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within J09.X (influenza due to identified novel influenza A virus), J09.X3 is specifically for influenza due to identified novel influenza A virus with gastrointestinal manifestations. Related codes cover with pneumonia (J09.X1), with other respiratory manifestations (J09.X2) and with other manifestations (J09.X9).

Don't report J09.X3 together with the conditions in its Excludes1 note: 'intestinal flu' [viral gastroenteritis] (A08.-).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 865 (Viral Illness with MCC, relative weight 1.3485) and DRG 866 (Viral Illness without MCC, relative weight 0.8692), in MDC 18 (Infectious and Parasitic Diseases, Systemic or Unspecified Sites), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 488.09 (influenza due to identified avian influenza virus with other manifestations) and 488.89 (influenza due to identified novel influenza A virus with other manifestations).