2026 ICD-10-CM Diagnosis Code I50.810Right heart failure, unspecified

ICD-10-CM Codes›I00–I99›I30-I5A›I50

ICD-10-CM I50.810
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I50.810 is a billable ICD-10-CM diagnosis code for right heart failure, unspecified. 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
I50.810
Billable Status
Yes — Valid for Submission
Code Describes
Right heart failure, unspecified
Short Description
Right heart failure, unspecified
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 CodeI50.810Right heart failure, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute congestive heart failure
  • Acute right-sided congestive heart failure
  • Acute right-sided heart failure
  • Bernheim's syndrome
  • Cardiac ascites
  • Chronic congestive heart failure
  • Chronic right-sided congestive heart failure
  • Chronic right-sided heart failure
  • Congestive heart failure with right heart failure
  • Right heart failure secondary to left heart failure
  • Right ventricular failure
  • Right ventricular failure due to pulmonary disease
  • Right ventricular failure due to pulmonary vascular disease
  • Right ventricular failure due to right ventricular infarction
  • Right ventricular failure due to valvular heart disease
  • Right ventricular failure with sepsis

Tabular List NotesGuidance

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

Inclusion Terms

  • Right heart failure without mention of left heart failure
  • Right ventricular failure NOS

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.

    • Ascites(abdominal)
      • cardiac
    • Ascites(abdominal)
      • heart
    • Failure, failed
      • heart (acute) (senile) (sudden)
        • right (isolated) (ventricular)

Clinical ClassificationClinical

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

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

Clinical InformationClinical

  • Right Ventricular Failure

    failure of proper functioning of the right ventricle, with venous engorgement, hepatic enlargement, and subcutaneous edema.

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 I50.810 to ICD-9-CMHistory

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

ICD-9-CM
428.9 Heart failure NOS
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement I50.810 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 I50.810Overview

Is I50.810 (Right heart failure) a billable code?

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

What MS-DRG does I50.810 group to?

When right heart failure, unspecified 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 I50.810?

Under the General Equivalence Mappings, right heart failure, unspecified converts to ICD-9-CM 428.9 (heart failure 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.