I353-char group
Nonrheumatic aortic valve disorders
⇄ Primary-code rule changed vs QĐ4469
Coding rules (TT06)
- ●Avoid — more specific 4-5 char codes exist (see below)
Coding guidance (WHO 2019)
Excl.: hypertrophic subaortic stenosis (I42.1) when of unspecified cause but with mention of diseases of mitral valve (I08.0) when specified as congenital (Q23.0, Q23.1, Q23.4-Q23.9) when specified as rheumatic (I06.-)