I82.463

HCC Category Mapping

What This Code Means

Blood clots that suddenly form in the calf muscle veins on both sides, affecting both lower legs.

Coding Tips

• •Only assign when bilateral calf muscular vein involvement is explicitly documented
• •This represents a more extensive thrombotic event requiring careful clinical correlation

Clinical Significance

Acute calf muscular vein thrombosis (soleal or gastrocnemius vein thrombosis) is a distal deep vein thrombosis within the intramuscular veins of the calf. While considered lower risk than proximal deep vein thrombosis, these clots can extend to larger veins and cause pulmonary embolism if untreated, particularly in patients with additional risk factors. Accurate capture ensures appropriate risk adjustment and reflects the need for clinical decision-making regarding anticoagulation.

Documentation Requirements

• ✓Clinical diagnosis of venous thrombosis or thrombophlebitis clearly documented by the treating provider
• ✓Diagnostic confirmation via duplex ultrasonography, CT venography, MR venography, or venography with imaging findings described
• ✓Current treatment plan including anticoagulation regimen with specific medication, dose, and duration
• ✓Documentation of acute onset with date of symptom onset or diagnosis establishing the acute nature
• ✓Explicit documentation that both lower extremities are affected
• ✓Assessment of risk factors (immobility, recent surgery, malignancy, hypercoagulable state, oral contraceptive use)

Commonly Confused Codes