ICD-10-CM 2027
ICD-10 code for human metapneumovirus pneumonia
From the official ICD-10-CM alphabetic index entry “Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) › human metapneumovirus”. Page updated September 29, 2026.
About coding human metapneumovirus pneumonia
The ICD-10-CM code for human metapneumovirus pneumonia is J12.3 (Human metapneumovirus pneumonia).
Within J12 (viral pneumonia, not elsewhere classified), J12.3 is specifically for human metapneumovirus pneumonia. Related codes cover adenoviral pneumonia (J12.0), respiratory syncytial virus pneumonia (J12.1), parainfluenza virus pneumonia (J12.2), 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 human metapneumovirus pneumonia ICD-10 codes
What is the ICD-10 code for human metapneumovirus pneumonia?
- J12.3 — Human metapneumovirus pneumonia.
Is J12.3 billable?
- Yes. J12.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J12.3 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J12.3 as a principal diagnosis.
Is J12.3 a CC or MCC?
- J12.3 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.