I82.5Y9

HCC Category Mapping

What This Code Means

A blood clot that has formed in the deep veins of the upper leg or thigh area and has persisted over time, affecting an unspecified leg. This is a chronic condition where the clot remains present rather than being a recent occurrence.

Coding Tips

• •Verify documentation specifies 'chronic' status and 'deep veins' location; if laterality (left/right) is documented, use a more specific code (I82.5Y1 for right or I82.5Y2 for left) rather than the unspecified 9th character
• •Confirm whether the thrombosis is post-thrombotic syndrome or related to another condition, as this may require additional codes; review for any associated complications like venous insufficiency

Clinical Significance

Chronic deep vein thrombosis of the proximal lower extremity (unspecified) indicates a long-standing thrombus that has organized within the venous system, often leading to post-thrombotic syndrome with chronic swelling, pain, and skin changes. This condition requires ongoing anticoagulation management and monitoring for recurrent thromboembolism and venous insufficiency. Accurate capture of chronic deep vein thrombosis is essential for risk adjustment as it reflects persistent vascular disease burden.

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
• ✓Query provider for specific vein location when possible
• ✓Query provider for laterality (right, left, or bilateral) when not documented
• ✓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