ICD-10 Code I80.02 – Phlebitis and thrombophlebitis of superficial vessels of left lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I80.02 – Phlebitis and thrombophlebitis of superficial vessels of left lower extremity
What it is
I80.02 identifies inflammation and clotting in a superficial vein of the left lower leg or thigh. Use it when the documentation specifies the left lower extremity and a superficial vessel.
Clinical signs
Typical findings include localized pain, tenderness, redness, warmth, and a palpable cord along a superficial vein. Clinical features vary; refer to documentation for laterality and whether thrombosis is confirmed.
When to use this code
Use this code when the provider documents superficial thrombophlebitis or phlebitis in the left lower extremity. It also fits when imaging or exam confirms a superficial venous clot on the left side. If the note only says “leg vein thrombosis,” check documentation for vessel type and laterality.
Do not use for
Do not use I80.02 for deep vein thrombosis, unspecified phlebitis, or disease in the right or bilateral leg. If the record does not identify a superficial vessel, check documentation.
Coding tip
Verify both laterality and that the affected vessel is superficial before assigning I80.02.