ICD-9-CM Diagnosis Code 429.89
Diagnosis Code: 429.89 (Raw: 42989)
Description: Other ill-defined heart diseases
Classification: International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM)
Fiscal Year: 2026 Reference
CMS Section 111 Status: Valid for reporting.
Overview & Historical Usage
ICD-9-CM code 429.89 is designated for Other ill-defined heart diseases. While superseded by ICD-10 for current healthcare encounters, it remains a recognized reference code for CMS Section 111 reporting, legacy claims adjudication, and historical clinical data analysis.