2027 ICD-10-CM Diagnosis Code I34Nonrheumatic mitral valve disorders

ICD-10-CM Codes›I00–I99›I30-I5A›I34

ICD-10-CM I34
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

I34 is a non-billable ICD-10-CM category code for nonrheumatic mitral valve disorders, so it cannot be submitted on claims. Use a more specific code from this category instead, such as I34.0, I34.1, I34.2, and I34.81.

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

Code Identity

ICD-10-CM Code
I34
Billable Status
No — Non-Billable Category
Code Describes
Nonrheumatic mitral valve disorders
Short Description
Nonrheumatic mitral valve disorders
Same as the full description in the CMS dataset.
Chapter
I30-I5A
Other forms of heart disease

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI30-I5AOther forms of heart disease
CategoryI34Nonrheumatic mitral valve disorders
This CodeI34Nonrheumatic mitral valve disorders

Specific Coding for Nonrheumatic mitral valve disordersOverview

Non-specific codes like I34 require more characters. Use one of these billable codes instead:

  • Use I34.0 for Nonrheumatic mitral (valve) insufficiency

  • Use I34.1 for Nonrheumatic mitral (valve) prolapse

  • Use I34.2 for Nonrheumatic mitral (valve) stenosis

  • I34.8 for Other nonrheumatic mitral valve disorders

  • Use I34.81 for Nonrheumatic mitral (valve) annulus calcification

  • Use I34.89 for Other nonrheumatic mitral valve disorders

  • Use I34.9 for Nonrheumatic mitral valve disorder, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to I34: its own notes plus those printed at Chapter 9. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

  • mitral valve disease (I05.9)
  • mitral valve failure (I05.8)
  • mitral valve stenosis (I05.0)
  • mitral valve disorder of unspecified cause with diseases of aortic and/or tricuspid valve(s) (I08.-)
  • mitral valve disorder of unspecified cause with mitral stenosis or obstruction (I05.0)
  • mitral valve disorder specified as congenital (Q23.2, Q23.9)
  • mitral valve disorder specified as rheumatic (I05.-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 9 (I00-I99) Diseases of the circulatory system applies to 1,433 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name I34, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming I34: they are not reported together with it, unless the two conditions are unrelated.

  • I05 Rheumatic mitral valve diseases
    mitral valve disease specified as nonrheumatic (I34.-)

Excludes2 1

These codes carry an Excludes2 note naming I34: its condition is not part of those codes, and both may be reported when the patient has both.

  • I08 Multiple valve diseases
    multiple valve disease specified as nonrheumatic (I34.-, I35.-, I36.-, I37.-, I38.-, Q22.-, Q23.-, Q24.8-)

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About I34Overview

What is the ICD-10 code for nonrheumatic mitral valve disorders?

I34 is the ICD-10-CM category for nonrheumatic mitral valve disorders, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is I34 (Nonrheumatic mitral valve disorders) a billable code?

No. This is a category header that groups the codes for nonrheumatic mitral valve disorders, and headers cannot be submitted on claims. Claims for nonrheumatic mitral valve disorders need a more specific code from this category, such as I34.0, I34.1, and I34.2.

Can I34 be reported with I05.9?

Not as a rule. The Excludes1 note on I34 lists "mitral valve disease (I05.9)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).