In simple words: Hardening and narrowing of the arteries in the extremities (excluding certain areas like the hip and groin, thigh, knee, and lower leg) leading to ulcers or sores on the skin.

Atherosclerosis of native arteries of the extremities, excluding the aortoiliac region, femoral, popliteal, tibial, peroneal, and bypass grafts, with associated ulceration.This code includes conditions specified as pelvic-limb type with ulceration.

Example 1: A 65-year-old patient with diabetes presents with a non-healing ulcer on the right ankle and pain in the lower leg, diagnosed with atherosclerosis of the arteries in the lower leg and ankle., A patient with a history of smoking experiences pain and cramping in the foot and toes, develops an ulcer on the big toe due to reduced blood flow from atherosclerosis in the foot arteries., A patient with high cholesterol and peripheral artery disease (PAD) develops an ulcer on the heel due to a restricted blood supply resulting from atherosclerosis of the arteries in the foot.

Medical record should include documentation of the location and characteristics of the ulcer, presence of PAD, results of vascular studies (e.g., Doppler ultrasound, angiography), and other relevant medical history like diabetes, hypertension, smoking, or hyperlipidemia.