ICD-10 Code I82.502 – Chronic embolism and thrombosis of unspecified deep veins of left lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.502 – Chronic embolism and thrombosis of unspecified deep veins of left lower extremity
What it is
This code identifies a chronic blood clot or embolus in the deep veins of the left lower leg, with the specific vein site not further documented. Use it when the condition is ongoing rather than acute.
Clinical signs
Clinical features may include persistent leg swelling, pain, heaviness, or skin changes from prior venous obstruction. Check documentation for evidence of chronicity, left-sided involvement, and deep vein location.
When to use this code
Use I82.502 when the provider documents chronic embolism or thrombosis involving unspecified deep veins in the left lower extremity. It fits follow-up visits, longstanding venous disease, or imaging-confirmed residual clot when no acute event is described.
If the record does not specify the vein or clearly states an acute process, choose a different code. Confirm laterality and chronic status before assigning this code.
Do not use for
Do not use this code for acute deep vein thrombosis, superficial thrombophlebitis, or embolism in another limb. Check documentation if the chronic or left-sided details are missing.
Coding tip
Verify both chronicity and laterality in the note; unspecified vein details are acceptable here, but left lower extremity must be documented.