Athscl nonaut biological CABG w ang pctrs w documented spasm

This code signifies the presence of atherosclerosis specifically affecting a non-autologous biological coronary artery bypass graft, meaning the graft material originated from a source other than the patient's own body (e.g., bovine, porcine). This atherosclerotic process is accompanied by angina pectoris, and critically, the angina is explicitly documented as being due to coronary artery spasm.

Apply this code when a patient with a history of coronary artery bypass grafting using a non-autologous biological graft presents with anginal symptoms. Documentation must clearly state that the angina is attributed to spasm and that atherosclerosis is present within the non-autologous biological graft itself. This code is appropriate for both initial and subsequent encounters where these conditions are present and documented.

• Ensure the documentation specifies "non-autologous biological" graft; do not use for autologous grafts or synthetic grafts.
• The presence of angina pectoris and documented spasm are mandatory for this code; do not use if spasm is not documented or if angina is absent.
• Refer to the Excludes1 note to avoid co-coding with I20.1, which describes angina pectoris with documented spasm without atherosclerosis of a non-autologous biological coronary artery bypass graft.