ICD-10 Code I82.81 – Embolism and thrombosis of superficial veins of lower extremities (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I82.81 – Embolism and thrombosis of superficial veins of lower extremities
What it is
This code identifies a clot or blockage in the superficial veins of the lower legs, such as superficial thrombophlebitis. It applies when the problem involves veins near the skin, not the deep venous system.
Clinical signs
Typical findings include localized pain, tenderness, warmth, redness, or a palpable cord along a superficial vein. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly documents embolism or thrombosis in a superficial vein of the lower extremity. It may also fit superficial venous thrombosis described in the calf, ankle, or thigh when the provider specifies the superficial system.
Check that the diagnosis is not described as deep vein thrombosis, varicose veins alone, or nonspecific leg pain. If the note is unclear about vein depth or location, you should verify the documentation before coding.
Do not use for
Do not use this code for deep vein thrombosis, pulmonary embolism, or superficial varicose veins without thrombosis. Check documentation if the provider does not specify the vein type.
Coding tip
Confirm that the documentation names a superficial vein and the lower extremity before assigning I82.81.