Question: What does the acronym HFpEF mean? My cardiologist documented this condition, and I’m not sure which ICD-10 code to report. South Carolina Subscriber Answer: HFpEF is the acronym for heart failure with preserved ejection fraction, also called diastolic failure. When a patient suffers from diastolic heart failure, the muscle of her left ventricle has become stiff and won’t relax [...]