ICD-10 Code I82.5Y1 – Chronic embolism and thrombosis of unspecified deep veins of right proximal lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.5Y1 – Chronic embolism and thrombosis of unspecified deep veins of right proximal lower extremity
What it is
This code identifies a chronic blood clot or embolus in the deep veins of the right upper leg, with the exact vein not specified. Use it when the condition is ongoing or residual, not an acute new event.
Clinical signs
Clinical features may include persistent unilateral leg swelling, pain, heaviness, or skin discoloration. Imaging or prior history usually supports the diagnosis; clinical features vary, so refer to documentation.
When to use this code
Use this code when the provider documents chronic embolism or thrombosis in an unspecified deep vein of the right proximal lower extremity. It fits follow-up care for an established condition, including residual clot burden or chronic venous obstruction. Do not assume chronicity unless the record clearly states it.
Do not use for
Do not use it for acute deep vein thrombosis, superficial vein thrombosis, or left-sided disease. If the documentation does not confirm a chronic process or right proximal lower-extremity location, check documentation.
Coding tip
Confirm both chronic status and right proximal location before assigning I82.5Y1.