Athscl nonautologous biological CABG w oth angina pectoris

This code signifies the presence of atherosclerosis specifically affecting a non-autologous biological coronary artery bypass graft, in a patient who is also experiencing other forms of angina pectoris. This means the patient has a bypass graft made from animal tissue or a cadaver, which has developed plaque buildup, and they are presenting with chest pain symptoms not classified as unstable, Prinzmetal's, or unspecified angina.

Apply this code when documentation clearly states atherosclerosis of a non-autologous biological coronary artery bypass graft and "other forms of angina pectoris" are present. This typically includes angina due to spasm, microvascular angina, or other specified types of angina. Ensure the graft type is explicitly identified as non-autologous and biological.

• Verify the graft type: This code is specific to non-autologous biological grafts. Do not use for autologous grafts (e.g., saphenous vein) or synthetic grafts.
• Confirm the angina type: "Other forms of angina pectoris" must be documented. If the angina is unstable, Prinzmetal's, or unspecified, a different code from the I20 series would be appropriate.
• Review the Excludes1 note: Never code this with I20.8- (other forms of angina pectoris without atherosclerosis of nonautologous biological coronary artery bypass graft(s)). The presence of the graft atherosclerosis is key.