2026 ICD-10-CM Diagnosis Code I36.8Other nonrheumatic tricuspid valve disorders

ICD-10-CM Codes›I00–I99›I30-I5A›I36

ICD-10-CM I36.8
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I36.8 is a billable ICD-10-CM diagnosis code for other nonrheumatic tricuspid valve disorders. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 306 through 307. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nonrheumatic and unspecified valve disorders.

Code Identity

ICD-10-CM Code
I36.8
Billable Status
Yes — Valid for Submission
Code Describes
Other nonrheumatic tricuspid valve disorders
Short Description
Other nonrheumatic tricuspid valve disorders
Same as the full description in the CMS dataset.
Parent Code
I36
Nonrheumatic tricuspid valve disorders

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI30-I5AOther forms of heart disease
CategoryI36Nonrheumatic tricuspid valve disorders
This CodeI36.8Other nonrheumatic tricuspid valve disorders

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormality of tricuspid chordae tendinae
  • Abscess of tricuspid valve
  • Arcade abnormality of tricuspid chordae tendinae
  • Calcification of tricuspid valve
  • Myxoid transformation of cardiac valve
  • Myxoid transformation of tricuspid valve
  • Perforation of tricuspid valve leaflet
  • Rupture of tricuspid valve leaflet
  • Thrombosis of tricuspid valve
  • Tricuspid chordae tendinae to outlet septum
  • Tricuspid chordae tendinae too long
  • Tricuspid chordae tendinae too short
  • Tricuspid leaflet deficiency
  • Tricuspid leaflet dysplasia
  • Tricuspid leaflet fenestration
  • Tricuspid leaflet flail
  • Tricuspid leaflet gelatinous
  • Tricuspid leaflet noncoapting
  • Tricuspid leaflet thickened
  • Tricuspid valve prolapse

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Atheroma, atheromatous
      • tricuspid (heart) (valve)
    • Endocarditis(chronic) (marantic) (nonbacterial) (thrombotic) (valvular)
      • tricuspid (chronic) (heart) (inactive) (rheumatic) (valve) (with chorea)
        • arteriosclerotic
    • Endocarditis(chronic) (marantic) (nonbacterial) (thrombotic) (valvular)
      • tricuspid (chronic) (heart) (inactive) (rheumatic) (valve) (with chorea)
        • nonrheumatic
    • Endocarditis(chronic) (marantic) (nonbacterial) (thrombotic) (valvular)
      • tricuspid (chronic) (heart) (inactive) (rheumatic) (valve) (with chorea)
        • specified cause, except rheumatic

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR CIR003
Nonrheumatic and unspecified valve disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Tricuspid Valve Prolapse

    abnormal protrusion of one or more of the leaflets of tricuspid valve into the right atrium during systole. this allows the backflow of blood into right atrium leading to tricuspid valve insufficiency; systolic murmurs. its most common cause is not primary valve abnormality but rather the dilation of the right ventricle and the tricuspid annulus.

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.

Convert I36.8 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
424.2 Nonrheum tricusp val dis
Approximate The match is approximate rather than exact.

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 I36.8Overview

Is I36.8 (Nonrheumatic tricuspid valve disorders) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other nonrheumatic tricuspid valve disorders on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does I36.8 group to?

When other nonrheumatic tricuspid valve disorders is the principal diagnosis on an inpatient stay, it groups to MS-DRG 306, 307, with relative weights from 0.9132 to 1.5758 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of I36.8?

Under the General Equivalence Mappings, other nonrheumatic tricuspid valve disorders converts to ICD-9-CM 424.2 (nonrheum tricusp val dis). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.