ICD-10 Code I82.591 – Chronic embolism and thrombosis of other specified deep vein of right lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.591 – Chronic embolism and thrombosis of other specified deep vein of right lower extremity
What it is
This code identifies a chronic blood clot or embolic blockage in a specified deep vein of the right lower leg or thigh. It applies when the provider documents a persistent deep vein obstruction that is not better described by another more specific code.
Clinical signs
Clinical features vary; refer to documentation. Common findings in chronic deep vein disease include leg swelling, pain, heaviness, skin discoloration, or residual venous obstruction noted on imaging.
When to use this code
Use this code when the record clearly states chronic embolism and thrombosis involving an other specified deep vein in the right lower extremity. It is appropriate for follow-up visits, prior clot history with persistent obstruction, or imaging-confirmed chronic venous thrombosis. Check documentation if laterality or vein location is unclear.
Do not use for
Do not use this code for acute deep vein thrombosis or for thrombosis in a different extremity. If the documentation names a more specific vein or a different condition, code that diagnosis instead.
Coding tip
Verify chronicity, laterality, and the exact vein named in the chart before assigning I82.591.