Heart failure (I50) ICD-10-CM
The I50 code range covers heart failure with 29 ICD-10-CM diagnosis codes. 23 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
- 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
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Codes in the I50 Range 29 codes · 23 billable
- I50 Heart failureNon-billable
- I50.1 Left ventricular failure, unspecified
- I50.2 Systolic (congestive) heart failureNon-billable
- I50.20 Unspecified systolic (congestive) heart failure
- I50.21 Acute systolic (congestive) heart failure
- I50.22 Chronic systolic (congestive) heart failure
- I50.23 Acute on chronic systolic (congestive) heart failure
- I50.3 Diastolic (congestive) heart failureNon-billable
- I50.30 Unspecified diastolic (congestive) heart failure
- I50.31 Acute diastolic (congestive) heart failure
- I50.32 Chronic diastolic (congestive) heart failure
- I50.33 Acute on chronic diastolic (congestive) heart failure
- I50.4 Combined systolic (congestive) and diastolic (congestive) heart failureNon-billable
- I50.40 Unspecified combined systolic (congestive) and diastolic (congestive) heart failure
- I50.41 Acute combined systolic (congestive) and diastolic (congestive) heart failure
- I50.42 Chronic combined systolic (congestive) and diastolic (congestive) heart failure
- I50.43 Acute on chronic combined systolic (congestive) and diastolic (congestive) heart failure
- I50.8 Other heart failureNon-billable
- I50.81 Right heart failureNon-billable
- I50.810 Right heart failure, unspecified
- I50.811 Acute right heart failure
- I50.812 Chronic right heart failure
- I50.813 Acute on chronic right heart failure
- I50.814 Right heart failure due to left heart failure
- I50.82 Biventricular heart failure
- I50.83 High output heart failure
- I50.84 End stage heart failure
- I50.89 Other heart failure
- I50.9 Heart failure, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the I50 range.
Acute Diastolic Congestive Heart Failure
Acute congestive heart failure due to a left ventricle which does not fill properly due to decreased compliance though the ejection fraction may be preserved.
Acute on Chronic Combined Systolic and Diastolic Heart Failure
Acute decompensation of chronic combined systolic and diastolic congestive heart failure.
Acute on Chronic Diastolic Congestive Heart Failure
Acute decompensation of chronic diastolic congestive heart failure.
Acute on Chronic Right Heart Failure
Acute decompensation of chronic right heart failure.
Acute on Chronic Systolic Congestive Heart Failure
Acute decompensation of chronic systolic congestive heart failure.
Acute Right Heart Failure
New or worsening signs of right heart failure.
Acute Systolic Congestive Heart Failure
Acute congestive heart failure due to reduced contractility of the left ventricle.
Biventricular Heart Failure
Heart failure due to dysfunction of both the left and right ventricles.
Chronic Combined Systolic and Diastolic Heart Failure
Chronic heart failure due to reduced contractility of the left ventricle and which does not fill properly due to decreased compliance.
Chronic Diastolic Congestive Heart Failure
Chronic congestive heart failure due to a left ventricle which does not fill properly due to decreased compliance though the ejection fraction may be preserved.
Chronic Right Heart Failure
Persistent and long-standing right heart failure.
Chronic Systolic Congestive Heart Failure
Chronic congestive heart failure due to reduced contractility of the left ventricle.
End Stage Heart Failure
The terminal phase of heart failure in patients. The disease course may have progressed despite intervention and may be characterized by dyspnea, fatigue, and weakness.
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.
High Output Heart Failure
Heart failure characterized by elevated cardiac output, low systemic vascular resistance and low arterial-venous oxygen content difference.
Left Ventricular Failure
Failure of adequate output by the left ventricle despite an increase in distending pressure and in end-diastolic volume, with dyspnea, orthopnea, and other signs and symptoms of pulmonary congestion and edema.
Right Heart Failure
Heart failure due to dysfunction of the right ventricle, tricuspid valve or right atrium and which is characterized by decreased perfusion of the lungs.
About the I50 Code Range
Heart failure means the heart cannot pump enough blood to meet the body’s needs. These codes distinguish the type of heart failure and, in some cases, which part of the heart is affected.
I50.1 describes left ventricular failure without further specification. I50.2 identifies systolic failure, I50.3 diastolic failure, and I50.4 combined systolic and diastolic failure. Each of these three branches separates acute, chronic, acute on chronic, and unspecified forms.
Under other heart failure, I50.81 separates right heart failure by those same forms and identifies right heart failure due to left heart failure. Other subdivisions identify biventricular, high output, and end stage heart failure. I50.9 identifies heart failure without a specified type.
Questions About This Page
How many billable codes are in the I50 range?
Of the 29 codes in this range, 23 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the I50 range classify?
The range classifies heart failure. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
