I82.569 Chronic embolism and thrombosis of unspecified calf muscular vein

ICD-10-CM I82.569: Chronic embolism and thrombosis of unspecified calf muscular vein

ICD-10-CM code I82.569 identifies chronic embolism and thrombosis of an unspecified calf muscular vein. Public sources establish this as a billable diagnosis within the circulatory system chapter, mapping to risk adjustment categories for vascular disease and thromboembolism. Clinical literature notes that calf vein thrombosis involves specific deep veins and muscular veins, with management varying based on patient risk factors and clinical progression. 4 5 6 2

Plain-language overview

Deep vein thrombosis is a condition where a blood clot develops in the deep veins, usually in the lower extremities, and venous thromboembolism refers to deep vein thrombosis, pulmonary embolism, or both. 3

Isolated calf deep venous thrombosis includes clots located at the far end of the popliteal vein, such as in the anterior tibial vein, posterior tibial vein, fibular vein, and the intramuscular veins of the soleus and gastrocnemius muscles. 2

What this code represents

ICD-10-CM code I82.569 represents chronic embolism and thrombosis of an unspecified calf muscular vein, and it is classified as a billable diagnosis code. 4 6

Code I82.569 sits in the ICD-10-CM chapter for diseases of the circulatory system, within the section covering diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified. 6

Coding details

Under the CMS-HCC V28 risk adjustment model, I82.569 maps to Deep Vein Thrombosis and Pulmonary Embolism with a community non-dual aged base RAF weight of 0.294, while the older V24 model maps it to Vascular Disease with a 0.288 weight. 6

Documentation considerations

Clinical literature indicates that management of isolated calf deep venous thrombosis is individualized based on patient history, active malignancy, and thrombosis progression, with some patients receiving short-term or prolonged anticoagulation therapy. 2

What the sources add

The EVS Explore source provides the formal code label and properties for I82.569, whereas the CMS article lists the code alongside other chronic embolism and thrombosis diagnoses, and the HCC Buddy source adds risk adjustment mapping details not present in the other sources. 4 5 6

Clinical guidelines from the National Center for Biotechnology Information describe venous thromboembolism scenarios including acute deep venous thrombosis and pulmonary embolism, noting that important clinical consequences of calf DVT include proximal extension, recurrence, pulmonary embolism, and post-thrombotic syndrome. 1

Questions to verify

Does the documentation specify whether the chronic embolism and thrombosis is in the right or left calf muscular vein, as I82.569 is used when the calf muscular vein is unspecified? 5 6

Sources

1. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-25.
2. Characteristics and Treatment Strategy of Isolated Calf Deep Venous Thrombosis after Fractures: A Review of Recent Literature — pmc.ncbi.nlm.nih.gov; accessed 2026-07-25.
3. Deep Vein Thrombosis and Pulmonary Embolism — cdc.gov; accessed 2026-07-25.
4. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-25.
5. Article - Billing and Coding: Non-Invasive Peripheral Venous Vascular and Hemodialysis Access Studies (A57594) — cms.gov; accessed 2026-07-25.
6. 2026 ICD-10-CM I82.569: Chronic embolism | HCC 267 — hccbuddy.com; accessed 2026-07-25.