I50.9

Billable
ChapterI00–I99
Ranksubcategory
Official Description

Heart failure, unspecified

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 9: Diseases of the Circulatory System (I00-I99).

Instructional Notes

Includes
  • Cardiac, heart or myocardial failure NOS
  • Congestive heart disease
  • Congestive heart failure NOS
Excludes2(Not included here)
  • fluid overload unrelated to congestive heart failure (E87.70)
General instructions are available for the parent sections:
View CH9 NotesView I50 Notes

Clinical Hierarchy

CH9Diseases of the circulatory system (I00-I99)
I30-I5AOther forms of heart disease (I30-I5A)
I50Heart failure
I50.9Heart failure, unspecified

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to I50.9:

categoryI50
Heart failure
View context instructions
chapterCH9
Diseases of the circulatory system (I00-I99)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to I50.9. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

21 raw paths
Asthenia, asthenic4 unique routes
cardiac→I50.9
cardiovascular→I50.9
heart→I50.9
myocardial→I50.9
Dysfunction1 unique routes
ventricular
with congestive heart failure→I50.9
Failure, failed13 unique routes
cardiorenal (chronic)→I50.9
heart (acute) (senile) (sudden)→I50.9(6 variants)
compensated→I50.9
congestive→I50.9
decompensated→I50.9
low output (syndrome) NOS→I50.9
with
decompensation→I50.9
myocardial, myocardium→I50.9(3 variants)
chronic→I50.9
congestive→I50.9
Note: heart failure stages A, B, C, and D are based on the American College of Cardiology and American Heart Association stages of heart failure, which complement and should not be confused with the New York Heart Association Classification of Heart Failure, into Class I, Class II, Class III, and Class IV(2 variants)
stage B→I50.9
stage C→I50.9
ventricular→I50.9
Insufficiency, insufficient1 unique routes
myocardial, myocardium (with arteriosclerosis)→I50.9
Paralysis, paralytic (complete) (incomplete)1 unique routes
cardiac→I50.9
Syndrome1 unique routes
low
output (cardiac)→I50.9

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 291
Heart Failure and Shock with MCC
DRG 292
Heart Failure and Shock with CC
DRG 293
Heart Failure and Shock without CC/MCC
DRG 791
Prematurity with Major Problems
DRG 793
Full Term Neonate with Major Problems

Cross Reference

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