2026 ICD-10-CM Diagnosis Code I05Rheumatic mitral valve diseases

ICD-10-CM Codes›I00–I99›I05-I09›I05

ICD-10-CM I05
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I05 is a non-billable ICD-10-CM category code for rheumatic mitral valve diseases, so it cannot be submitted on claims. Use a more specific code from this category instead, such as I05.0, I05.1, I05.2, and I05.8.

Code Identity

ICD-10-CM Code
I05
Billable Status
No — Non-Billable Category
Code Describes
Rheumatic mitral valve diseases
Chapter
I05-I09
Chronic rheumatic heart diseases

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI05-I09Chronic rheumatic heart diseases
CategoryI05Rheumatic mitral valve diseases
This CodeI05Rheumatic mitral valve diseases

Specific Coding for Rheumatic mitral valve diseasesOverview

Non-specific codes like I05 require more characters. Use one of these billable codes instead:

  • Use I05.0 for Rheumatic mitral stenosis

  • Use I05.1 for Rheumatic mitral insufficiency

  • Use I05.2 for Rheumatic mitral stenosis with insufficiency

  • Use I05.8 for Other rheumatic mitral valve diseases

  • Use I05.9 for Rheumatic mitral valve disease, unspecified

Tabular List NotesGuidance

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

Includes

Type 1 Excludes

  • mitral valve disease specified as nonrheumatic I34
  • mitral valve disease with aortic and/or tricuspid valve involvement I08

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 I05Overview

Is I05 (Rheumatic mitral valve diseases) a billable code?

No. This is a category header that groups the codes for rheumatic mitral valve diseases, and headers cannot be submitted on claims. Claims for rheumatic mitral valve diseases need a more specific code from this category, such as I05.0, I05.1, and I05.2.