Athscl native arteries of extrm w rest pain, bilateral legs

This code signifies a severe form of peripheral artery disease (PAD) affecting both lower extremities, characterized by significant narrowing or hardening of the native arteries. The patient experiences ischemic rest pain, meaning pain in the legs or feet that occurs even at rest, indicating critical limb ischemia. This condition is due to chronic atherosclerosis, a buildup of plaque within the arterial walls.

Apply this code when documentation clearly indicates bilateral lower extremity atherosclerosis causing rest pain. This typically presents in patients with advanced PAD who report constant pain, often worse at night, that is not relieved by changes in position. Supporting documentation should include physician notes detailing the diagnosis of atherosclerosis, the presence of rest pain, and the bilateral involvement of the legs.

• Ensure documentation specifies "rest pain" and not just claudication, as rest pain indicates a more severe stage of PAD.
• Verify bilateral involvement; if only one leg is affected, a different code from the I70.22 series would be appropriate.
• Do not confuse with codes for atherosclerosis of bypass grafts or other arterial locations.