Pneumonia due to parainfluenza virus

This code identifies pneumonia specifically caused by an infection with the parainfluenza virus. It signifies an acute inflammatory condition of the lung parenchyma, where the parainfluenza virus has been identified as the causative agent.

Use this code when medical record documentation clearly states a diagnosis of pneumonia and laboratory testing or clinical evidence confirms parainfluenza virus as the etiology. This is appropriate for both inpatient and outpatient settings when the viral cause is established.

• Always ensure the documentation explicitly links parainfluenza virus as the cause of the pneumonia.
• Do not use this code for unspecified viral pneumonia or pneumonia due to other identified viruses.
• Consider sequencing this code as the primary diagnosis if it is the reason for the encounter, followed by any associated complications.