I50.43 – Acute on chronic combined systolic (congestive) and diastolic (congestive) heart failure
ICD-10-CM 2027 diagnosis code · Other forms of heart disease
ICD-10-CM code
I50.43
- Code
I50.43(claims format:I5043)- Description
- Acute on chronic combined systolic (congestive) and diastolic (congestive) heart failure
- Short description
- Acute on chronic combined systolic and diastolic hrt fail
- 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 › I50.4
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)
I50.4 – Combined systolic (congestive) and diastolic (congestive) heart failure
Applicable to:
- Combined systolic and diastolic left ventricular heart failure
- Heart failure with reduced ejection fraction and diastolic dysfunction
Code also:
- end stage heart failure, if applicable (I50.84)
Index terms for I50.43
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Failure, failed, heart, diastolic, combined with systolic, acute, and
- Failure, failed, heart, diastolic, combined with systolic, chronic, and
- Failure, failed, heart, with, decompensation, combined systolic and diastolic
- Failure, failed, heart, with, decompensation, with, reduced ejection fraction, with diastolic dysfunction
- 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, systolic, combined with diastolic, acute, and
- 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, systolic, combined with diastolic, chronic, and
Related codes in I50.4
Frequently asked questions
What is ICD-10 code I50.43?
I50.43 is the ICD-10-CM code for acute on chronic combined systolic (congestive) and diastolic (congestive) heart failure, in the block I30-I5A (Other forms of heart disease).
Is I50.43 a billable code?
Yes. I50.43 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does I50.43 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.