E34.01

HCC Category Mapping

What This Code Means

Carcinoid heart syndrome is a condition where hormone-secreting tumors cause damage to the heart valves, leading to valve dysfunction.

Coding Tips

• •This code indicates carcinoid syndrome with cardiac involvement; document the specific valve(s) affected if possible
• •May require additional codes for the underlying carcinoid tumor and any resulting heart valve disease

Clinical Significance

Carcinoid heart syndrome is a serious complication of carcinoid syndrome where serotonin and other vasoactive substances cause fibrotic damage to heart valves, predominantly affecting the right side (tricuspid and pulmonic valves). This leads to progressive valvular regurgitation or stenosis and can result in right-sided heart failure, making it a major determinant of morbidity and mortality in carcinoid patients.

Documentation Requirements

• ✓Documentation must include echocardiographic findings demonstrating valve thickening, retraction, or regurgitation consistent with carcinoid heart disease.
• ✓Specify which valves are affected and the severity of valve dysfunction.
• ✓Biochemical markers (5-hydroxyindoleacetic acid, chromogranin A, N-terminal pro-brain natriuretic peptide) and the underlying neuroendocrine tumor location and stage should be documented.
• ✓Heart failure status and functional class should be noted.

Commonly Confused Codes