I82.B13

HCC Category Mapping

What This Code Means

Sudden blood clots that have formed in both the right and left subclavian veins (major veins near both collarbones), potentially causing acute bilateral obstruction.

Coding Tips

• •Use this code only when documentation clearly indicates acute bilateral involvement of both subclavian veins
• •Ensure both sides are documented as affected; use unilateral codes if only one side is involved

Clinical Significance

Acute subclavian vein thrombosis represents a significant vascular event that can lead to pulmonary embolism, post-thrombotic syndrome, and recurrent venous thromboembolism. This diagnosis is critical for risk adjustment as it reflects active vascular disease requiring anticoagulation therapy, monitoring, and potentially invasive interventions. Accurate capture ensures appropriate resource allocation for ongoing management and complication prevention.

Documentation Requirements

• ✓Provider documentation explicitly stating acute embolism or thrombosis of the subclavian vein
• ✓Laterality must be documented (bilateral) — do not assume from context
• ✓Clinical findings supporting the diagnosis (e.g., swelling, pain, imaging results such as duplex ultrasound or CT venography)
• ✓Current treatment plan including anticoagulation therapy type, duration, and monitoring parameters
• ✓Date of onset or timeframe establishing the acute nature of the condition
• ✓Any precipitating factors (central line placement, surgery, malignancy, hypercoagulable state)

Commonly Confused Codes