I82.559

Billable

Chronic embolism and thrombosis of unspecified peroneal vein

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 chronic blood clot in an unspecified peroneal vein (a deep vein in the calf area) that has been present for an extended period.

Coding Tips

•Verify documentation specifies 'chronic' status and peroneal vein location before assigning this code
•If laterality (left/right) is documented, use more specific codes I82.551 or I82.552 instead

Clinical Significance

Chronic peroneal (fibular) vein thrombosis is a distal deep vein thrombosis that indicates a persistent clot in one of the paired veins running alongside the fibula. While peroneal vein thrombosis is a distal deep vein thrombosis, it can propagate to the popliteal vein and cause clinically significant post-thrombotic changes. Capturing this diagnosis accurately supports appropriate risk adjustment and reflects the patient's ongoing vascular disease management needs.

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., peroneal)
✓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

I82.459 — Acute embolism and thrombosis of peroneal vein; ensure documentation supports chronic rather than acute I82.54- — Chronic embolism and thrombosis of tibial vein; the tibial and peroneal veins are separate paired calf veins I82.56- — Chronic embolism and thrombosis of calf muscular vein; calf muscular veins (soleal, gastrocnemius) are distinct from the peroneal vein I82.5Z- — Chronic embolism of unspecified deep veins of distal lower extremity; use peroneal-specific code when documentation specifies the peroneal vein

Code Hierarchy

└I82Other venous embolism and thrombosis └I82.5Chronic embolism and thrombosis of deep veins of lower extremity └I82.55Chronic embolism and thrombosis of peroneal vein └I82.559Chronic embolism and thrombosis of unspecified peroneal vein

└I82.559Chronic embolism and thrombosis of unspecified peroneal vein