Heart Failure Diagnosis and Coding Guidelines

Core Diagnostic Requirements

The American College of Cardiology recommends that heart failure should be coded when a patient has both typical symptoms (breathlessness, fatigue, or ankle swelling) AND objective evidence of cardiac structural/functional abnormality at rest, corroborated by elevated natriuretic peptides and/or evidence of congestion 1
Heart failure is a clinical syndrome, not merely an imaging finding or risk state, and all three components (symptoms, signs, and objective cardiac abnormality) must be present for appropriate coding 2, 3
The European Heart Journal guidelines state that symptoms of heart failure include breathlessness at rest or on exertion, fatigue, tiredness, ankle swelling 1
Signs of heart failure include elevated jugular venous pressure, pulmonary crackles, peripheral edema, tachycardia, pleural effusion, hepatomegaly 1
Objective cardiac abnormality can be demonstrated by echocardiography showing reduced ejection fraction, left ventricular hypertrophy, diastolic dysfunction, valvular disease, OR elevated natriuretic peptides (BNP/NT-proBNP) 4, 1

The American College of Cardiology recommends classifying heart failure by ejection fraction (HFrEF, HFmrEF, HFpEF) and functional status (NYHA Class) 4, 1
Heart failure can be classified into four stages: Stage A (at risk), Stage B (pre-heart failure), Stage C (symptomatic heart failure), and Stage D (advanced/refractory heart failure) 5, 4
The American College of Cardiology guidelines state that Stage C heart failure is characterized by symptomatic heart failure with structural heart disease 5, 4
Stage D heart failure is characterized by advanced/refractory heart failure requiring specialized interventions, recurrent hospitalizations 5, 4

The American College of Cardiology recommends that the following must be documented to support a heart failure diagnosis code: history, physical exam, laboratory tests, ECG, imaging, and biomarkers 6, 5
The European Heart Journal guidelines state that the underlying cause of heart failure must be identified and coded, and that heart failure should never be coded as the sole diagnosis 2, 3
Ischemic cardiomyopathy is the most common cause of heart failure, accounting for approximately 40% of cases 7
Hypertensive heart disease is another common cause of heart failure, accounting for 17-31% of cases 7

The European Heart Journal guidelines state that accuracy of clinical diagnosis alone is inadequate, particularly in women, elderly, and obese patients, and that objective testing is mandatory 8, 2, 3
Response to diuretics or nitrates alone is insufficient for diagnosis, though patients should generally demonstrate improvement with appropriate therapy 2, 3