2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Nonrheumatic aortic 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
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to I35: its own notes plus those printed at Chapter 9. A note printed at a category, block or chapter applies to every code under it.

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.

On I35 itself
  • 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)
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.-)

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

  • if applicable, bicuspid aortic valve (Q23.81)

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

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name I35, its category, or a range that includes it.

Excludes2 2

These codes carry an Excludes2 note naming I35: its condition is not part of those codes, and both may be reported when the patient has both.

  • I06 Rheumatic aortic valve diseases
    aortic valve disease not specified as rheumatic (I35.-)
  • I08 Multiple valve diseases
    multiple valve disease specified as nonrheumatic (I34.-, I35.-, I36.-, I37.-, I38.-, Q22.-, Q23.-, Q24.8-)

Code First 1

These codes say to code first a condition named in the note, and I35 is one of the conditions named.

  • I5A Non-ischemic myocardial injury (non-traumatic)
    nonrheumatic aortic valve disorders (I35.-)

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 I35Overview

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

I35 is the ICD-10-CM category for nonrheumatic aortic valve disorders, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.