Acute and chronic respiratory failure with hypercapnia

This code signifies a severe respiratory condition where the lungs are unable to adequately oxygenate the blood and remove carbon dioxide, leading to both acute (sudden onset or worsening) and chronic (long-standing) respiratory failure. A key characteristic is hypercapnia, indicating an abnormally high level of carbon dioxide in the arterial blood.

Apply this code when documentation clearly indicates a patient is experiencing both acute exacerbation or worsening of chronic respiratory failure, and laboratory results confirm hypercapnia (elevated PaCO2). This is often seen in patients with underlying chronic obstructive pulmonary disease (COPD) or other chronic lung diseases who develop an acute decompensation.

• Always sequence this code as the principal diagnosis when it is the reason for admission, or as a secondary diagnosis when it complicates another condition.
• Ensure documentation explicitly states "acute and chronic" and "hypercapnic" respiratory failure; avoid using this code for hypoxic respiratory failure.
• Do not code separately for acute respiratory failure (J96.0x) and chronic respiratory failure (J96.1x) when both are present and hypercapnic; this code encompasses both.