J96.21
BillableAcute and chronic respiratory failure with hypoxia
HCC Category Mapping
V28HCC 213 — Cardio-Respiratory Failure and Shock
0.000V24HCC 84 — Cardio-Respiratory Failure and Shock
0.402ESRDHCC 84 — Cardio-Respiratory Failure and Shock
0.000What This Code Means
A condition where a patient with chronic lung failure experiences an acute worsening with dangerously low oxygen levels.
Coding Tips
- •Requires documentation of both acute exacerbation and chronic respiratory failure with hypoxia; verify ABG results
- •Common in COPD patients presenting with acute decompensation; ensure both components are clearly documented
Clinical Significance
Acute and chronic respiratory failure with hypoxia represents an acute hypoxemic decompensation in a patient with pre-existing chronic respiratory failure. This is the most specific code for patients with baseline chronic respiratory compromise who develop acute worsening with documented low oxygen levels. It is commonly seen in COPD exacerbations, heart failure decompensation, and acute infections in patients with chronic lung disease.
Documentation Requirements
- ✓Provider documentation confirming acute and chronic respiratory failure with hypoxia
- ✓ABG showing acute hypoxemia (low PaO2) superimposed on chronic baseline changes
- ✓Documentation of prior chronic respiratory failure (home oxygen, prior ABGs, prior encounter documentation)
- ✓Identification of the acute precipitant (infection, exacerbation, heart failure, PE)
- ✓Treatment plan including oxygen therapy, ventilatory support, and management of the acute trigger
Commonly Confused Codes
J96.01 — Acute respiratory failure with hypoxia does not capture the chronic componentJ96.11 — Chronic respiratory failure with hypoxia does not capture the acute decompensationJ96.20 — Acute and chronic respiratory failure unspecified should not be used when hypoxia is documentedJ96.22 — Acute and chronic respiratory failure with hypercapnia is for CO2 retention, not hypoxia
Code Hierarchy
└J96Respiratory failure, not elsewhere classified└J96.2Acute and chronic respiratory failure└J96.21Acute and chronic respiratory failure with hypoxia
└J96.21Acute and chronic respiratory failure with hypoxia