I50.42

HCC Category Mapping

What This Code Means

A long-term condition where the heart has both reduced pumping ability and stiffness, preventing effective blood circulation and causing persistent symptoms.

Coding Tips

• •Confirm documentation indicates 'chronic' combined systolic and diastolic heart failure
• •Verify both systolic and diastolic components are present; ensure no acute exacerbation is documented

Clinical Significance

Chronic combined systolic and diastolic congestive heart failure indicates longstanding dual ventricular dysfunction requiring comprehensive ongoing management. These patients typically have more advanced disease, lower quality of life, and higher mortality than those with isolated systolic or diastolic failure. Annual recapture is essential for reflecting disease complexity.

Documentation Requirements

• ✓Provider must document 'chronic' combined systolic and diastolic heart failure
• ✓Echocardiographic evidence of both reduced ejection fraction and diastolic filling abnormalities
• ✓Guideline-directed medical therapy addressing both components
• ✓Functional status assessment and New York Heart Association functional class
• ✓Absence of current acute exacerbation — if worsening, code I50.43 instead
• ✓Monitoring plan and follow-up schedule

Commonly Confused Codes