I50.40 Unspecified combined systolic (congestive) and diastolic (congestive) heart failure
ICD-10-CM · CMS code reference
Official ICD-10-CM description: Unspecified combined systolic (congestive) and diastolic (congestive) heart failure
Coding notes
From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.
Excludes2
Not part of this code, but both can be coded when both are documented.
- cardiac arrest (I46.-)
- neonatal cardiac failure (P29.0)
Code first
Code the underlying condition first, then this code.
- 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)
Code also
A second code may be needed. Sequencing depends on the encounter.
- end stage heart failure, if applicable (I50.84)
Related codes
I50.30Unspecified diastolic (congestive) heart failure ICD-10-CMI50.31Acute diastolic (congestive) heart failure ICD-10-CMI50.32Chronic diastolic (congestive) heart failure ICD-10-CMI50.33Acute on chronic diastolic (congestive) heart failure ICD-10-CMI50.41Acute combined systolic (congestive) and diastolic (congestive) heart failure ICD-10-CMI50.42Chronic combined systolic (congestive) and diastolic (congestive) heart failure ICD-10-CMI50.43Acute on chronic combined systolic (congestive) and diastolic (congestive) heart failure ICD-10-CMI50.810Right heart failure, unspecified ICD-10-CM
Common questions
Is I50.40 a billable code?
Yes. I50.40 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.