I82.532

HCC Category Mapping

What This Code Means

A blood clot that has formed in the left popliteal vein (a major vein behind the knee) and has persisted over time, potentially blocking blood flow in the leg. This is a chronic condition meaning it has developed gradually or persisted for an extended period.

Coding Tips

• •Verify documentation specifies 'chronic' and 'left popliteal vein' to ensure accurate laterality and chronicity coding; do not assume chronic status without explicit provider documentation
• •Check for associated conditions like post-thrombotic syndrome, venous insufficiency, or active anticoagulation therapy that may require additional codes to capture the complete clinical picture

Clinical Significance

Chronic popliteal vein thrombosis involves a persistent clot in the major vein behind the knee, which serves as the transition point between proximal and distal deep venous systems. This location is clinically significant because popliteal vein thrombosis carries meaningful risk of post-thrombotic syndrome and may impair venous return from the entire lower leg. Accurate documentation of chronic popliteal vein thrombosis is important for capturing vascular disease complexity in risk adjustment.

Documentation Requirements

• ✓Provider documentation explicitly stating 'chronic' deep vein thrombosis (not assumed from duration of treatment)
• ✓Clinical evidence supporting the diagnosis such as duplex ultrasound, venography, or other imaging results
• ✓Specific vein location documented (e.g., popliteal)
• ✓Documentation confirming left-sided laterality
• ✓Current treatment plan including anticoagulation therapy and duration
• ✓Assessment and monitoring notes demonstrating the condition is being actively managed
• ✓Documentation of chronicity such as 'chronic,' 'old,' 'long-standing,' or history of prior acute deep vein thrombosis that has transitioned to chronic status

Commonly Confused Codes