I35.1 – Nonrheumatic aortic (valve) insufficiency

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

Billable code

ICD-10-CM code I35.1

Code: I35.1 (claims format: I351)
Description: Nonrheumatic aortic (valve) insufficiency
Billable: Yes – valid for HIPAA-covered transactions
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
Parent codes: I35

Notes for I35.1

Applicable to:

Nonrheumatic aortic (valve) incompetence NOS
Nonrheumatic aortic (valve) regurgitation NOS

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

I35 – Nonrheumatic aortic valve disorders

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)

Index terms for I35.1

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in I35

Frequently asked questions

What is ICD-10 code I35.1?

I35.1 is the ICD-10-CM code for nonrheumatic aortic (valve) insufficiency, in the block I30-I5A (Other forms of heart disease).

Is I35.1 a billable code?

Yes. I35.1 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does I35.1 belong to?

It belongs to category I35 – Nonrheumatic aortic valve disorders.

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.