ICD-10 Code I74.4 – Embolism and thrombosis of arteries of extremities, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I74.4 – Embolism and thrombosis of arteries of extremities, unspecified
What it is
I74.4 identifies a blockage in an artery of an arm or leg caused by a clot or embolus, when the record does not specify the exact extremity or vessel. Use it for arterial obstruction in the limbs that is otherwise unspecified.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include sudden limb pain, pallor, coolness, reduced pulses, numbness, or weakness consistent with acute arterial compromise.
When to use this code
Use this code when the provider documents embolism or thrombosis affecting an extremity artery but does not name the arm, leg, or specific artery. It also fits when the note confirms arterial occlusion in an extremity and further detail is unavailable. Check documentation if the site is later clarified.
Do not use for
Do not use I74.4 for venous thrombosis, superficial thrombophlebitis, or embolism in non-extremity arteries. If the chart specifies a different artery or a more exact extremity site, code that instead.
Coding tip
Query for laterality and vessel detail before defaulting to the unspecified code.