ICD-10 Code I80.01 – Phlebitis and thrombophlebitis of superficial vessels of right lower extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I80.01 – Phlebitis and thrombophlebitis of superficial vessels of right lower extremity
What it is
This code identifies inflammation and clotting in a superficial vein of the right lower leg. It is used when the condition is limited to superficial vessels, not deep veins.
Clinical signs
Typical findings include localized pain, tenderness, redness, warmth, and a palpable cord along a superficial vein. Clinical features vary; refer to documentation.
When to use this code
Use I80.01 when the record clearly documents superficial phlebitis or thrombophlebitis in the right lower extremity. You should select it when laterality is specified and the involved vessel is superficial. Check documentation if the note only says “leg clot” or does not distinguish superficial from deep veins.
Do not use for
Do not use this code for deep vein thrombosis, unspecified leg vein thrombosis, or superficial thrombophlebitis on the left or unspecified side. Check documentation if the site or laterality is unclear.
Coding tip
Confirm both laterality and vein depth in the provider note before assigning I80.01.