I82.501

Billable

Chronic embolism and thrombosis of unspecified deep veins of right lower extremity

HCC Category Mapping

V28HCC 267 — Vascular Disease

0.356

V24HCC 108 — Vascular Disease

0.297

ESRDHCC 108 — Vascular Disease

0.000

RxHCCHCC 215 — Pulmonary Embolism and Other Vascular Disease

0.000

What This Code Means

A blood clot in the deep veins of the right leg that has been present for a long time, affecting unspecified deep veins.

Coding Tips

•Use this code when the specific deep vein is not documented; if femoral or iliac vein is specified, use more specific codes I82.51x or I82.52x
•Verify documentation states 'chronic' to distinguish from acute thrombosis codes (I82.40x series)

Clinical Significance

Chronic deep vein thrombosis of the 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
✓Documentation confirming right-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

I82.40- — Acute embolism and thrombosis of unspecified deep veins of lower extremity; ensure chronicity is documented before using the I82.50- series I82.51- through I82.56- — Specific vein codes (femoral, iliac, popliteal, tibial, peroneal, calf muscular); always use the most specific code available based on documentation I80.2- — Phlebitis and thrombophlebitis of deep vessels of lower extremities; this describes vein wall inflammation with thrombosis, a different pathology I87.01- — Postthrombotic syndrome; a distinct sequela condition that may accompany chronic deep vein thrombosis but requires separate coding

Code Hierarchy

└I82Other venous embolism and thrombosis └I82.5Chronic embolism and thrombosis of deep veins of lower extremity └I82.50Chronic embolism and thrombosis of unspecified deep veins of lower extremity └I82.501Chronic embolism and thrombosis of unspecified deep veins of right lower extremity

└I82.501Chronic embolism and thrombosis of unspecified deep veins of right lower extremity