Acute diastolic (congestive) heart failure

This code signifies a sudden onset or worsening of heart failure primarily due to impaired ventricular relaxation and filling, leading to elevated diastolic pressures. The heart's ability to fill with blood during diastole is compromised, resulting in symptoms of congestion.

Apply this code when documentation explicitly states "acute diastolic heart failure" or "acute congestive heart failure with preserved ejection fraction (HFpEF)." This diagnosis is supported by findings such as dyspnea, pulmonary edema, and elevated B-type natriuretic peptide (BNP) in the context of acute decompensation.

• Distinguish carefully between acute and chronic diastolic heart failure; this code is specifically for the acute presentation.
• Ensure documentation specifies "diastolic" or "preserved ejection fraction" to differentiate from systolic heart failure.
• Consider sequencing this code as a principal diagnosis if it is the primary reason for the encounter, or as a secondary diagnosis if it complicates another condition.