2026 ICD-10-CM Diagnosis Code I35Nonrheumatic aortic valve disorders

ICD-10-CM Codes›I00–I99›I30-I5A›I35

ICD-10-CM I35
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I35 is a non-billable ICD-10-CM category code for nonrheumatic aortic valve disorders, so it cannot be submitted on claims. Use a more specific code from this category instead, such as I35.0, I35.1, I35.2, and I35.8.

This medical diagnosis code is frequently used in Cardiology medical specialties to designate conditions such nonrheumatic valve disorders - aortic valve disorders.

Code Identity

ICD-10-CM Code
I35
Billable Status
No — Non-Billable Category
Code Describes
Nonrheumatic aortic valve disorders
Chapter
I30-I5A
Other forms of heart disease

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI30-I5AOther forms of heart disease
CategoryI35Nonrheumatic aortic valve disorders
This CodeI35Nonrheumatic aortic valve disorders

Specific Coding for Nonrheumatic aortic valve disordersOverview

Non-specific codes like I35 require more characters. Use one of these billable codes instead:

  • Use I35.0 for Nonrheumatic aortic (valve) stenosis

  • Use I35.1 for Nonrheumatic aortic (valve) insufficiency

  • Use I35.2 for Nonrheumatic aortic (valve) stenosis with insufficiency

  • Use I35.8 for Other nonrheumatic aortic valve disorders

  • Use I35.9 for Nonrheumatic aortic valve disorder, unspecified

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Code Also

  • , if applicable, bicuspid aortic valve Q23.81

Type 2 Excludes

  • aortic valve disorder of unspecified cause but with diseases of mitral and/or tricuspid valves I08
  • aortic valve disorder specified as congenital Q23.0 Q23.1
  • aortic valve disorder specified as rheumatic I06
  • hypertrophic subaortic stenosis I42.1

Patient EducationClinical

Heart Valve Diseases

Heart valve disease happens when one or more of your heart valves don't work well.

The full article covers:

  • What are heart valve diseases?
  • What are the types of heart valve diseases?
  • What causes heart valve diseases?
  • Who is more likely to develop heart valve diseases?
  • What are the symptoms of heart valve diseases?
  • What other problems can heart valve diseases cause?
  • How is heart valve disease diagnosed?
  • What are the treatments for heart valve diseases?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About I35Overview

Is I35 (Nonrheumatic aortic valve disorders) a billable code?

No. This is a category header that groups the codes for nonrheumatic aortic valve disorders, and headers cannot be submitted on claims. Claims for nonrheumatic aortic valve disorders need a more specific code from this category, such as I35.0, I35.1, and I35.2.