Athscl nonaut bio bypass of the extrm w rest pain, bi legs

This code signifies atherosclerosis affecting a non-native biological bypass graft in both lower extremities, presenting with rest pain. This condition indicates a narrowing or hardening of the graft due to plaque buildup, leading to insufficient blood flow even at rest. The graft itself is derived from biological material but is not from the patient's own body (e.g., bovine or porcine graft).

Apply this code when documentation confirms a diagnosis of atherosclerosis specifically within a nonautologous biological bypass graft in both legs. The patient must be experiencing rest pain attributable to this graft pathology. Supporting documentation should include operative reports detailing the graft type and location, and physician notes describing the atherosclerotic changes and bilateral rest pain.

• Ensure the documentation explicitly states "nonautologous biological bypass graft" and not a synthetic or autologous graft.
• Verify that rest pain is specifically linked to the atherosclerotic graft in both legs; do not use for claudication or pain at other sites.
• Consider sequencing this code with codes for underlying peripheral artery disease if applicable, following ICD-10-CM guidelines.