2026 ICD-10-CM Diagnosis Code I50Heart failure

ICD-10-CM Codes›I00–I99›I30-I5A›I50

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

I50 is a non-billable ICD-10-CM category code for heart failure, so it cannot be submitted on claims. Use a more specific code from this category instead, such as I50.1, I50.20, I50.21, and I50.22.

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

Code Identity

ICD-10-CM Code
I50
Billable Status
No — Non-Billable Category
Code Describes
Heart failure
Chapter
I30-I5A
Other forms of heart disease

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI30-I5AOther forms of heart disease
CategoryI50Heart failure
This CodeI50Heart failure

Specific Coding for Heart failureOverview

Non-specific codes like I50 require more characters. Use one of these billable codes instead:

  • Use I50.1 for Left ventricular failure, unspecified

  • I50.2 for Systolic (congestive) heart failure

  • Use I50.20 for Unspecified systolic (congestive) heart failure

  • Use I50.21 for Acute systolic (congestive) heart failure

  • Use I50.22 for Chronic systolic (congestive) heart failure

  • Use I50.23 for Acute on chronic systolic (congestive) heart failure

  • I50.3 for Diastolic (congestive) heart failure

  • Use I50.30 for Unspecified diastolic (congestive) heart failure

  • Use I50.31 for Acute diastolic (congestive) heart failure

  • Use I50.32 for Chronic diastolic (congestive) heart failure

  • Use I50.33 for Acute on chronic diastolic (congestive) heart failure

  • I50.4 for Combined systolic (congestive) and diastolic (congestive) heart failure

  • Use I50.40 for Unspecified combined systolic (congestive) and diastolic (congestive) heart failure

  • Use I50.41 for Acute combined systolic (congestive) and diastolic (congestive) heart failure

  • Use I50.42 for Chronic combined systolic (congestive) and diastolic (congestive) heart failure

  • Use I50.43 for Acute on chronic combined systolic (congestive) and diastolic (congestive) heart failure

  • I50.8 for Other heart failure

  • I50.81 for Right heart failure

  • Use I50.82 for Biventricular heart failure

  • Use I50.83 for High output heart failure

  • Use I50.84 for End stage heart failure

  • Use I50.89 for Other heart failure

  • Use I50.9 for Heart failure, unspecified

Tabular List NotesGuidance

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

Code First

  • heart failure complicating abortion or ectopic or molar pregnancy O00 O07 O08.8
  • heart failure due to hypertension I11.0
  • heart failure due to hypertension with chronic kidney disease I13
  • heart failure following surgery I97.13
  • obstetric surgery and procedures O75.4
  • rheumatic heart failure I09.81

Type 2 Excludes

  • cardiac arrest I46
  • neonatal cardiac failure P29.0

Clinical InformationClinical

  • Heart Failure

    a heterogeneous condition in which the heart is unable to pump out sufficient blood to meet the metabolic need of the body. heart failure can be caused by structural defects, functional abnormalities (ventricular dysfunction), or a sudden overload beyond its capacity. chronic heart failure is more common than acute heart failure which results from sudden insult to cardiac function, such as myocardial infarction.

  • Heart Failure, Diastolic

    heart failure caused by abnormal myocardial relaxation during diastole leading to defective cardiac filling.

  • Heart Failure, Systolic

    heart failure caused by abnormal myocardial contraction during systole leading to defective cardiac emptying.

  • Diastole

    post-systolic relaxation of the heart, especially the heart ventricles.

  • Systole

    period of contraction of the heart, especially of the heart ventricles.

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.

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 I50Overview

Is I50 (Heart failure) a billable code?

No. This is a category header that groups the codes for heart failure, and headers cannot be submitted on claims. Claims for heart failure need a more specific code from this category, such as I50.1, I50.20, and I50.21.