FY2027
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Excludes1 pair

A08- vs J10.2

A08 and J10.2 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.

The official note, declared on A08
influenza with involvement of gastrointestinal tract (J09.X3, J10.2, J11.2)
A08

Viral and other specified intestinal infections

Not billable
Chapter 1
Certain infectious and parasitic diseases
Section
A00-A09
J10.2

Influenza due to other identified influenza virus with gastrointestinal manifestations

Billable
Chapter 10
Diseases of the respiratory system
Section
J09-J18
Use when the record says
  • Influenza due to other identified influenza virus gastroenteritis
Indexed under
  • Influenza › due to › identified influenza virus NEC › with › digestive manifestations
  • Influenza › due to › identified influenza virus NEC › with › enteritis
  • Influenza › due to › identified influenza virus NEC › with › gastroenteritis
  • Influenza › due to › identified influenza virus NEC › with › gastrointestinal manifestations

These two codes sit in different chapters of the Tabular List, which is usually the clearest signal that they describe different underlying processes rather than different degrees of the same one.

Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027