ICD-10 Code I70.202 – Unspecified atherosclerosis of native arteries of extremities, left leg (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I70.202 – Unspecified atherosclerosis of native arteries of extremities, left leg
What it is
This code identifies atherosclerosis in the native arteries of the left leg when the record does not specify the vessel or whether there is gangrene or other complications. It indicates plaque-related narrowing or hardening of those arteries.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include reduced leg pulses, leg pain with walking, cool skin, or signs of impaired circulation in the left lower extremity.
When to use this code
Use this code when the clinician documents atherosclerosis of native arteries in the left leg but does not identify a more specific artery or severity. It is appropriate for routine vascular assessments, imaging impressions, or problem lists that clearly name the left leg. If documentation later specifies gangrene or another site, code that more specific diagnosis instead.
Do not use for
Do not use this code for atherosclerosis of bypass grafts, coronary arteries, or arteries in other body sites. Also avoid it when the record specifies gangrene or a more detailed left lower-extremity arterial diagnosis.
Coding tip
Check the note for laterality and vessel detail; if the left leg is documented but the artery is not, I70.202 is the correct unspecified choice.