I26.04

HCC Category Mapping

What This Code Means

A serious emergency where fat particles from bone marrow enter the bloodstream and lodge in the lungs, causing acute heart failure.

Coding Tips

• •Fat embolism typically occurs after long bone fractures or orthopedic procedures; document the triggering event
• •May be associated with fat embolism syndrome; document systemic manifestations if present

Clinical Significance

Fat embolism to the pulmonary artery with acute cor pulmonale is a serious complication most commonly associated with long bone fractures, orthopedic surgery, or liposuction. Fat globules from bone marrow enter the venous system and embolize to the lungs, causing both mechanical obstruction and inflammatory injury. The presence of acute cor pulmonale indicates significant pulmonary vascular compromise and right heart failure, requiring aggressive supportive care.

Documentation Requirements

• ✓Clinical context supporting fat embolism — recent fracture, orthopedic surgery, or other predisposing condition
• ✓Fat embolism syndrome manifestations — respiratory distress, petechial rash, neurological changes, thrombocytopenia
• ✓Evidence of acute cor pulmonale — right ventricular strain on imaging or clinical assessment
• ✓Pulmonary imaging consistent with fat embolism pattern
• ✓Supportive treatment plan including respiratory support and hemodynamic management

Commonly Confused Codes