I35Nonrheumatic aortic valve disorders

I35 is the ICD-10-CM diagnosis code for nonrheumatic aortic valve disorders. It belongs to block I30-I5A (other forms of heart disease) and chapter 9 (diseases of the circulatory system). It is a header code, so it can't be reported by itself; one of its 5 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: I35.0 (stenosis), I35.1 (insufficiency), I35.2 (insufficiency), I35.8 (disorders) and I35.9 (unspecified).

The conditions in its Excludes2 note aren't part of I35, but may be coded alongside it if the patient has both: aortic valve disorder of unspecified cause but with diseases of mitral and/or tricuspid valve(s) (I08.-), aortic valve disorder specified as congenital (Q23.0, Q23.1), aortic valve disorder specified as rheumatic (I06.-) and hypertrophic subaortic stenosis (I42.1).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.