Nonrheumatic aortic valve disorders (I35) ICD-10-CM
The I35 code range covers nonrheumatic aortic valve disorders with 6 ICD-10-CM diagnosis codes. 5 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Code Also
A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
- , if applicable, bicuspid aortic valve Q23.81
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Codes in the I35 Range 6 codes · 5 billable
- I35 Nonrheumatic aortic valve disordersNon-billable
- I35.0 Nonrheumatic aortic (valve) stenosis
- I35.1 Nonrheumatic aortic (valve) insufficiency
- I35.2 Nonrheumatic aortic (valve) stenosis with insufficiency
- I35.8 Other nonrheumatic aortic valve disorders
- I35.9 Nonrheumatic aortic valve disorder, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the I35 range.
Aortic Valve Stenosis
A pathological constriction that can occur above (supravalvular stenosis), below (subvalvular stenosis), or at the AORTIC VALVE. It is characterized by restricted outflow from the LEFT VENTRICLE into the AORTA.
About the I35 Code Range
ICD-10 code I35 covers nonrheumatic aortic valve disorders, which are conditions affecting the aortic valve not caused by rheumatic fever. These codes specify various valve issues such as narrowing (stenosis), leaking (insufficiency), or a combination of both, helping healthcare providers accurately record and manage these distinct heart valve diseases.
The codes within this section include I35.0 for nonrheumatic aortic stenosis—also known by terms like "aortic stenosis," "senile aortic stenosis," or "supravalvar aortic stenosis"—which involves narrowing of the valve restricting blood flow. I35.1 codes aortic valve leaking, called "aortic insufficiency" or "aortic regurgitation," caused by valve malfunction or damage and includes prosthetic valve issues. I35.2 defines combined stenosis with insufficiency, capturing cases with both narrowing and leaking. I35.8 includes other nonrheumatic valve disorders such as valve calcification, cusp abnormalities, and complications like endocarditis. Finally, I35.9 is used when the nonrheumatic aortic valve disorder is unspecified but documented. These codes are vital for clinical documentation and billing related to nonrheumatic aortic valve conditions.
Questions About This Page
How many billable codes are in the I35 range?
Of the 6 codes in this range, 5 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the I35 range classify?
The range classifies nonrheumatic aortic valve disorders. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
