ICD-10 code for HFrEF (heart failure with reduced ejection fraction)

The ICD-10-CM code for HFrEF (heart failure with reduced ejection fraction) is I50.20 (Unspecified systolic (congestive) heart failure). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I50.20.

It is also searched as systolic heart failure, heart failure with reduced ejection fraction.

Within I50.2, choose I50.20 (Unspecified systolic (congestive) heart failure) only when documentation doesn't support a more specific option: acute systolic (congestive) heart failure (I50.21), chronic systolic (congestive) heart failure (I50.22) and acute on chronic systolic (congestive) heart failure (I50.23).

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-) and 2 more.

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.