2026 ICD-10-CM Diagnosis Code I50.1Left ventricular failure, unspecified
ICD-10-CM Codes›I00–I99›I30-I5A›I50
- Billable — Valid for Submission
- Chronic Condition
I50.1 is a billable ICD-10-CM diagnosis code for left ventricular 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
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute congestive heart failure
- Acute left ventricular failure
- Acute left-sided congestive heart failure
- Acute left-sided heart failure
- Cardiac asthma
- Chronic congestive heart failure
- Chronic left-sided congestive heart failure
- Chronic left-sided heart failure
- Congestive heart failure due to left ventricular systolic dysfunction
- Congestive rheumatic heart failure
- Heart failure with normal ejection fraction
- Ischemic contracture of left ventricle syndrome
- Left heart failure
- Left ventricular cardiac dysfunction
- Left ventricular failure with normal ejection fraction due to cardiomyopathy
- Left ventricular failure with normal ejection fraction due to coronary artery disease
- Left ventricular failure with normal ejection fraction due to myocarditis
- Left ventricular failure with normal ejection fraction due to valvular heart disease
- Left ventricular failure with sepsis
- Postcapillary pulmonary hypertension
- Pulmonary hypertension due to left heart disease
- Pulmonary hypertension due to systolic systemic ventricular dysfunction
- Rheumatic left ventricular failure
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Cardiac asthma
- Edema of lung with heart disease NOS
- Edema of lung with heart failure
- Left heart failure
- Pulmonary edema with heart disease NOS
- Pulmonary edema with heart failure
Type 1 Excludes
- edema of lung without heart disease or heart failure J81
- pulmonary edema without heart disease or failure J81
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Asthma, asthmatic (bronchial) (catarrh) (spasmodic) - J45.909
- cardiobronchial - I50.1
- heart - I50.1
- Rostan's - I50.1
- Disease, diseased - See Also: Syndrome;
- heart (organic) - I51.9
- with
- pulmonary edema (acute) - See Also: Failure, ventricular, left; - I50.1
- ventricular - See Also: Failure, heart; - I50.9
- left - See Also: Failure, heart, left; - I50.1
- Stone (s) - See Also: Calculus;
- heart syndrome - I50.1
- Syndrome - See Also: Disease;
- cardiac asthma - I50.1
- Ridley's - I50.1
- stone heart - I50.1
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Asthma, asthmatic(bronchial) (catarrh) (spasmodic)
- cardiobronchial
- Asthma, asthmatic(bronchial) (catarrh) (spasmodic)
- heart
- Asthma, asthmatic(bronchial) (catarrh) (spasmodic)
- Rostan's
- Disease, diseased
- heart (organic)
- with
- pulmonary edema (acute)
- Edema, edematous(infectious) (pitting) (toxic)
- lung
- meaning failure, left ventricle
- Failure, failed
- ventricular
- left
- Stone(s)
- heart syndrome
- Syndrome
- cardiac asthma
- Syndrome
- Ridley's
- Syndrome
- stone heart
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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.
Convert I50.1 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About I50.1Overview
Is I50.1 (Heart failure) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report left ventricular failure, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does I50.1 group to?
When left ventricular 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 I50.1?
Under the General Equivalence Mappings, left ventricular failure, unspecified converts to ICD-9-CM 428.1 (left heart failure). The mapping is a direct match.
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.
