ICD-10-CM 2027
ICD-10 code for adenoviral pneumonia
From the official ICD-10-CM alphabetic index entry “Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) › adenoviral”. Page updated September 29, 2026.
About coding adenoviral pneumonia
The ICD-10-CM code for adenoviral pneumonia is J12.0 (Adenoviral pneumonia).
Within J12 (viral pneumonia, not elsewhere classified), J12.0 is specifically for adenoviral pneumonia. Related codes cover respiratory syncytial virus pneumonia (J12.1), parainfluenza virus pneumonia (J12.2), human metapneumovirus pneumonia (J12.3), other viral pneumonia (J12.8) and viral pneumonia, unspecified (J12.9).
Code first: associated influenza, if applicable (J09.X1, J10.0-, J11.0-).
As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.
Common questions about adenoviral pneumonia ICD-10 codes
What is the ICD-10 code for adenoviral pneumonia?
- J12.0 — Adenoviral pneumonia.
Is J12.0 billable?
- Yes. J12.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J12.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J12.0 as a principal diagnosis.
Is J12.0 a CC or MCC?
- J12.0 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.