ICD-10 Code I70.393 – Other atherosclerosis of unspecified type of bypass graft(s) of the extremities, bilateral legs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.393 – Other atherosclerosis of unspecified type of bypass graft(s) of the extremities, bilateral legs
What it is
This code identifies atherosclerotic disease affecting unspecified bypass grafts in both lower extremities. It means plaque-related narrowing or blockage is present in graft vessels supplying the legs.
Clinical signs
Clinical features may include leg pain with walking, reduced pulses, cool skin, or poor circulation in the affected limbs. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record documents atherosclerosis in bypass grafts of the extremities and the condition involves both legs. Choose it when the graft type is not further specified and the note supports bilateral lower-extremity involvement.
Do not infer laterality or graft details from imaging alone if the provider has not documented them clearly. Check documentation for the exact vessel type and whether the bypass graft is native, autologous, or prosthetic.
Do not use for
Do not use this code for native artery atherosclerosis without bypass graft involvement. Do not use it when the record identifies a different graft type or a more specific lower-extremity laterality code.
Coding tip
Verify both the bypass graft involvement and bilateral leg documentation before assigning I70.393.