Athscl autologous artery CABG w ang pctrs w documented spasm

This code identifies a patient experiencing chest pain due to a spasm within an autologous artery bypass graft, where the graft itself has developed atherosclerosis. This indicates a specific type of coronary artery disease affecting a previously implanted bypass vessel.

Apply this code when documentation clearly states angina pectoris with documented spasm occurring in an autologous artery coronary bypass graft, and also specifies atherosclerosis within that graft. This diagnosis requires both the presence of graft atherosclerosis and the anginal spasm.

• Differentiate from I20.1, which describes angina with spasm without graft atherosclerosis.
• Ensure documentation specifies "autologous artery" graft, as other graft types have different codes.
• Code also any associated coronary artery disease in native vessels if present and documented.