I82.503
BillableChronic embolism and thrombosis of unspecified deep veins of lower extremity, bilateral
HCC Category Mapping
V28HCC 267 — Vascular Disease
0.356V24HCC 108 — Vascular Disease
0.297ESRDHCC 108 — Vascular Disease
0.000RxHCCHCC 215 — Pulmonary Embolism and Other Vascular Disease
0.000What This Code Means
Blood clots in the deep veins of both legs that have been present for a long time, affecting unspecified deep veins on each side.
Coding Tips
- •This code indicates bilateral involvement; ensure documentation clearly states both legs are affected
- •Do not use this code if only one leg is affected; use the appropriate unilateral code instead
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 bilateral involvement (both extremities affected)
- ✓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- seriesI82.51- through I82.56- — Specific vein codes (femoral, iliac, popliteal, tibial, peroneal, calf muscular); always use the most specific code available based on documentationI80.2- — Phlebitis and thrombophlebitis of deep vessels of lower extremities; this describes vein wall inflammation with thrombosis, a different pathologyI87.01- — 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└I82.503Chronic embolism and thrombosis of unspecified deep veins of lower extremity, bilateral
└I82.503Chronic embolism and thrombosis of unspecified deep veins of lower extremity, bilateral