J12.2Parainfluenza virus pneumonia

J12.2 is the ICD-10-CM diagnosis code for parainfluenza virus pneumonia. It belongs to category J12 (viral pneumonia, not elsewhere classified), 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 J12 (viral pneumonia, not elsewhere classified), J12.2 is specifically for parainfluenza virus pneumonia. Related codes cover adenoviral pneumonia (J12.0), respiratory syncytial virus pneumonia (J12.1), 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.

In MS-DRG v44.0, it is part of the grouping logic for DRG 193 (Simple Pneumonia and Pleurisy with MCC, relative weight 1.2825), DRG 194 (Simple Pneumonia and Pleurisy with CC, relative weight 0.7888) and DRG 195 (Simple Pneumonia and Pleurisy without CC/MCC, relative weight 0.6063), in MDC 04 (Diseases and Disorders of the Respiratory System), 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 480.2 (pneumonia due to parainfluenza virus).