ICD-10 Code I82.549 – Chronic embolism and thrombosis of unspecified tibial vein (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.549 – Chronic embolism and thrombosis of unspecified tibial vein
What it is
This code identifies a chronic blood clot or embolus in a tibial vein of the lower leg when the exact tibial vein is not specified. It indicates an ongoing, not acute, venous obstruction.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings include persistent leg swelling, pain, heaviness, or residual venous changes after a prior thrombosis.
When to use this code
Use this code when the provider documents chronic embolism or thrombosis involving an unspecified tibial vein and does not name a more specific vein. It is appropriate for follow-up encounters, old clot findings, or ongoing venous disease after the acute phase has passed. Check documentation if laterality or a more specific vein is recorded.
Do not use for
Do not use it for acute tibial vein thrombosis or for thrombosis in a different leg vein. If the record only says DVT without chronicity or vessel detail, check documentation.
Coding tip
Confirm chronicity and the exact vein location before assigning this code; unspecified vessel details can change code selection.