Convert to ICD-10-CM: 
429.6 converts approximately to:
- 2015/16 ICD-10-CM I51.2 Rupture of papillary muscle, not elsewhere classified
 ICD-9-CM Volume 2 Index entries containing back-references to 
429.6:
- Rupture, ruptured 553.9  papillary muscle (ventricular) 429.6 papillary muscle (ventricular) 429.6