ICD-10 Code I74.3 – Embolism and thrombosis of arteries of the lower extremities (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I74.3 – Embolism and thrombosis of arteries of the lower extremities
What it is
I74.3 identifies a blockage in one or both arteries supplying the lower extremities caused by an embolus or a thrombus. Use it when the record specifies arterial embolism or thrombosis in the leg.
Clinical signs
Typical findings include sudden leg pain, pallor, coolness, weak or absent pulses, and reduced limb perfusion. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents embolism or thrombosis affecting arteries of the lower extremities, including the thigh, calf, or foot. It also fits cases described as acute arterial occlusion in the leg when the source is arterial and the lower limb is specified.
Do not use for
Do not use I74.3 for venous thrombosis, peripheral artery disease without embolism or thrombosis, or nonspecific limb ischemia. Check documentation if the site or vessel type is unclear.
Coding tip
Confirm that the chart identifies arterial involvement and the lower extremity location before assigning I74.3.