I50.9 – Heart failure, unspecified
ICD-10-CM 2027 diagnosis code · Other forms of heart disease
ICD-10-CM code
I50.9
- Code
I50.9(claims format:I509)- Description
- Heart failure, unspecified
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 9. Diseases of the circulatory system (I00-I99)
- Block
- I30-I5A Other forms of heart disease
- Parent codes
- I50
Notes for I50.9
Applicable to:
- 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)
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
I50 – Heart failure
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)
Index terms for I50.9
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Syndrome, low, output
- Failure, failed, heart
- Asthenia, asthenic, heart
- Asthenia, asthenic, cardiac
- Failure, failed, cardiorenal
- Failure, failed, ventricular
- Paralysis, paralytic, cardiac
- Asthenia, asthenic, myocardial
- Asthenia, asthenic, cardiovascular
- Failure, failed, heart, low output
- Failure, failed, heart, congestive
- Failure, failed, heart, compensated
- Failure, failed, heart, decompensated
- Failure, failed, myocardial, myocardium
- Failure, failed, heart, with, decompensation
- Failure, failed, myocardial, myocardium, chronic
- Failure, failed, myocardial, myocardium, congestive
- Insufficiency, insufficient, myocardial, myocardium
- Dysfunction, ventricular, with congestive heart failure
- Failure, failed, 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, stage B
- Failure, failed, 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, stage C
Related codes in I50
Frequently asked questions
What is ICD-10 code I50.9?
I50.9 is the ICD-10-CM code for heart failure, unspecified, in the block I30-I5A (Other forms of heart disease).
Is I50.9 a billable code?
Yes. I50.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does I50.9 belong to?
It belongs to category I50 – Heart failure.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.