AHA Coding Clinic® for ICD-9 - 1989 Third Quarter

Ill-Defined Descriptions and Complications of Heart Disease

Code Revisions Effective October 1, 1989 Category 429, Ill-defined descriptions and complications of heart disease, has been expanded to include a subdivision 429.7 to identify certain sequelae, such as acquired cardiac septal defect and mural thrombus following myocardial infarctions. These revisions are effective October 1, 1989. The revisions are as follows: 429 Ill-defined descriptions and complications of heart disease 429.7 Certain sequelae of myocardial infarction, not elsewhere classified Use additional code to identify the associated myocardial infarction: with onset of 8 weeks or less (410.00-410.92) with onset of more than 8 weeks (414.8) Excludes:...

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