I35

Header — not billable

Nonrheumatic aortic valve disorders

The ICD-10 code for nonrheumatic aortic valve disorders is I35.

I35 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 5 more specific codes below.

Clinical notes

Code also

Two codes may be needed to fully describe a condition, but unlike Code First/Use Additional Code, the sequencing order is not mandated by convention.

, if applicable, bicuspid aortic valve (Q23.81)

Excludes2 (not included here)

An Excludes2 note means the excluded condition is not part of this one, but a patient can have both at the same time — in that case both codes may be reported together.

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.-)
hypertrophic subaortic stenosis (I42.1)

Documentation support

General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.

•This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
•Laterality-specific codes exist for this condition — confirm the affected side is documented.
•As a general rule, code to the highest level of specificity supported by the documentation in the medical record.

I35

Clinical notes

Code also

Excludes2 (not included here)

Documentation support

Child codes under I35

Related codes in this category