Athscl unsp type bypass graft(s) of extremity w ulceration

This code signifies hardening and narrowing of the arteries within a bypass graft in an extremity other than the lower limbs, complicated by tissue breakdown and ulcer formation. This atherosclerosis specifically affects a graft of an unspecified type, indicating the original vessel used for the bypass is not specified in the documentation. The ulceration represents a significant complication of the underlying vascular disease.

Apply this code when documentation clearly indicates atherosclerosis within a bypass graft in an upper extremity or other non-lower limb, and an associated ulcer is present. This is appropriate when the specific type of bypass graft (e.g., autologous vein, synthetic) is not documented. Supporting documentation would include physician notes detailing the location of the graft, the presence of atherosclerosis, and the existence of an ulcer.

• Ensure the documentation specifies "other extremity" to differentiate from lower limb involvement.
• Confirm the presence of an ulcer; without ulceration, a different code from the I70.3 series would be appropriate.
• If the type of bypass graft is specified (e.g., autologous vein, synthetic), a more specific code within the I70.3 category should be selected.