ICD-10-CM Code for Left Superficial Femoral Artery Occlusion
The ICD-10-CM code for chronic total occlusion of the left superficial femoral artery is I70.242 (atherosclerosis of native arteries of left leg with ulceration) if tissue loss is present, or I70.222 (atherosclerosis of native arteries of left leg with rest pain) for critical limb ischemia, or I70.212 (atherosclerosis of native arteries of left leg with intermittent claudication) if the patient has claudication symptoms without tissue loss or rest pain.
Code Selection Algorithm
For symptomatic left SFA occlusion, select the code based on clinical severity:
I70.212 – Use when the patient presents with intermittent claudication (calf pain with walking that resolves with rest) without rest pain or tissue loss 1
I70.222 – Use when the patient has rest pain (ischemic pain at rest, typically in the foot) indicating critical limb-threatening ischemia 1
I70.24X – Use when tissue loss is present (non-healing ulcer or gangrene); the seventh character specifies ulcer location (e.g., I70.242 for thigh, I70.243 for calf, I70.244 for ankle, I70.245 for foot) 1
I70.202 – Use for asymptomatic left leg atherosclerosis if the occlusion is an incidental finding without symptoms 1
Clinical Context for Code Assignment
The presence of complete SFA occlusion alone does not automatically indicate critical limb ischemia. The deep femoral artery typically provides substantial collateral circulation to reconstitute the popliteal artery, so isolated SFA occlusion rarely leads to tissue loss 1, 2. However, when complete SFA occlusion is combined with severe distal tibial disease (popliteal or tibial occlusions), the risk of progressing to critical limb ischemia increases markedly because collateral pathways are limited 1, 2.
Key physical examination findings guide code selection:
Palpable distal pulses (dorsalis pedis, posterior tibial) with normal limb coloration suggest non-threatened limb and typically warrant a claudication code (I70.212) 1
Absent pulses, dependent rubor, elevation pallor, cool skin, or non-healing wounds indicate more severe ischemia requiring I70.222 or I70.24X codes 1
The "6 Ps" (pain, paralysis, paresthesia, pulselessness, pallor, poikilothermia) indicate acute rather than chronic occlusion and require different coding 1
Common Coding Pitfalls
Do not use a single generic PAD code for all SFA occlusions. The ICD-10-CM system requires laterality (left vs. right) and symptom severity specification 1. Using I70.209 (unspecified extremity) or I70.20 (unspecified severity) represents incomplete documentation.
Do not assume all elderly patients with SFA occlusion have critical limb ischemia. Age ≥80 years is associated with reduced survival after revascularization, but chronic occlusion with adequate collaterals may present only as stable claudication 1.
Document the presence or absence of tissue loss explicitly, as this distinction determines whether I70.21X (claudication/rest pain) versus I70.24X (ulceration) codes apply 1.