AHA Coding Clinic® for ICD-9 - 1997 Third Quarter; Clarifications

Coronary Artery Disease

Please clarify the use of the fifth digits for code 414.0x. We are confused over what fifth digit to use. The patient has coronary artery disease and had a CABG done years earlier. He still has coronary artery disease, but the chart does not clearly state where. He is not in the hospital for treatment of the CAD (surgery or PTCA). Is code 414.00, Coronary atherosclerosis, of unspecified type of vessel, native or graft, used, or is code 414.01, Coronary atherosclerosis of native coronary artery, assigned to show the old occlusion of the native artery bypassed years earlier with the CABG, or is 414.05, Coronary atherosclerosis, of unspecified type of bypass graft, (new code effective 10/1/96) used since he had the CABG done earlier? ...

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