NPI Atlas

I35 – Nonrheumatic aortic valve disorders

ICD-10-CM 2027 diagnosis code · Other forms of heart disease

Non-billable header

ICD-10-CM code I35

Code: I35 (claims format: I35)
Description: Nonrheumatic aortic valve disorders
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 9. Diseases of the circulatory system (I00-I99)
Block: I30-I5A Other forms of heart disease

Billable codes under I35

I35 is a header code and cannot be used on claims. Choose the most specific code:

I35.0 – Nonrheumatic aortic (valve) stenosisBillable
I35.1 – Nonrheumatic aortic (valve) insufficiencyBillable
I35.2 – Nonrheumatic aortic (valve) stenosis with insufficiencyBillable
I35.8 – Other nonrheumatic aortic valve disordersBillable
I35.9 – Nonrheumatic aortic valve disorder, unspecifiedBillable

Notes for I35

Excludes2 (not included here):

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)

Code also:

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

Frequently asked questions

What is ICD-10 code I35?

I35 is the ICD-10-CM code for nonrheumatic aortic valve disorders, in the block I30-I5A (Other forms of heart disease).

Is I35 a billable code?

No. I35 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.