2026 ICD-10-CM Diagnosis Code I50.814Right heart failure due to left heart failure

ICD-10-CM Codes›I00–I99›I30-I5A›I50

ICD-10-CM I50.814
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I50.814 is a billable ICD-10-CM diagnosis code for right heart failure due to left heart failure. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 291 through 293. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Heart failure.

This medical diagnosis code is frequently used in Cardiology medical specialties to designate conditions such heart failure.

Code Identity

ICD-10-CM Code
I50.814
Billable Status
Yes — Valid for Submission
Code Describes
Right heart failure due to left heart failure
Short Description
Right heart failure due to left heart failure
Same as the full description in the CMS dataset.
Parent Code
I50.81
Right heart failure

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI30-I5AOther forms of heart disease
CategoryI50Heart failure
This CodeI50.814Right heart failure due to left heart failure

Tabular List NotesGuidance

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

Inclusion Terms

  • Right ventricular failure secondary to left ventricular failure

Code Also

  • the type of left ventricular failure, if known I50.2 I50.43

Type 1 Excludes

  • Right heart failure with but not due to left heart failure I50.82

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.

    • Failure, failed
      • biventricular
        • due to left heart failure
    • Failure, failed
      • heart (acute) (senile) (sudden)
        • biventricular
          • due to left heart failure
    • Failure, failed
      • heart (acute) (senile) (sudden)
        • combined left-right sided
          • due to left heart failure
    • Failure, failed
      • heart (acute) (senile) (sudden)
        • right (isolated) (ventricular)
          • secondary to left heart failure

Clinical ClassificationClinical

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

CCSR CIR019
Heart failure
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Heart Failure

Heart failure means that your heart can't pump enough oxygen-rich blood to meet your body's needs. Heart failure doesn't mean that your heart has stopped or is about to stop beating. But without enough blood flow, your organs may not work well, which can cause serious problems.

The full article covers:

  • What is heart failure?
  • What causes heart failure?
  • Who is more likely to develop heart failure?
  • What are the symptoms of heart failure?
  • What other problems does heart failure cause?
  • How is heart failure diagnosed?
  • What are the treatments for heart failure?
  • Can heart failure be prevented?

Read the full article at MedlinePlus

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

Convert I50.814 to ICD-9-CMHistory

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

ICD-9-CM
428.0 CHF NOS
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement I50.814 replaces the following previously assigned code(s):

  • I50.9 - Heart failure, unspecified
FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About I50.814Overview

Is I50.814 (Right heart failure) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report right heart failure due to left heart failure on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does I50.814 group to?

When right heart failure due to left heart failure is the principal diagnosis on an inpatient stay, it groups to MS-DRG 291, 292, 293, with relative weights from 0.5660 to 1.2838 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of I50.814?

Under the General Equivalence Mappings, right heart failure due to left heart failure converts to ICD-9-CM 428.0 (CHF NOS). 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.