I51.1
BillableRupture of chordae tendineae, not elsewhere classified
HCC Category Mapping
V28HCC 229 — Unstable Angina and Other Acute Ischemic Heart Disease
0.000V24HCC 86 — Acute Myocardial Infarction
0.274ESRDHCC 86 — Acute Myocardial Infarction
0.000RxHCCHCC 188 — Coronary Artery Disease and Angina
0.000What This Code Means
A tear or break in the chordae tendineae, which are the small strings that attach the heart valves to the heart muscle.
Coding Tips
- •Ensure the rupture is not due to rheumatic heart disease or endocarditis, which have different codes
- •Document which valve is affected (mitral, tricuspid, aortic, or pulmonary) if specified
Clinical Significance
Rupture of chordae tendineae is a serious structural cardiac abnormality where the cord-like tendons that anchor the mitral or tricuspid valve leaflets to the papillary muscles break. This causes acute or progressive valvular regurgitation, potentially leading to acute heart failure. Surgical intervention is often required.
Documentation Requirements
- ✓Provider must document rupture or torn chordae tendineae
- ✓Affected valve — typically mitral valve
- ✓Degree of resulting valvular regurgitation
- ✓Etiology: degenerative, endocarditis, myocardial infarction, trauma
- ✓Hemodynamic impact and symptoms
- ✓Treatment plan including surgical repair or replacement if indicated
Excludes 1 — Do NOT code together
- rupture of chordae tendineae as current complication following acute myocardial infarction (I23.4)
Commonly Confused Codes
I51.2 — Rupture of papillary muscle: the papillary muscle itself ruptures, not just the chordaeI34.1 — Mitral valve prolapse: prolapse without rupture of chordae tendineaeI34.0 — Nonrheumatic mitral valve insufficiency: general mitral regurgitation without chordal ruptureI23.4 — Rupture of chordae tendineae as current complication of acute myocardial infarction: use within 4 weeks of myocardial infarctionI05.1 — Rheumatic mitral insufficiency: rheumatic etiology for valvular disease
Code Hierarchy
└I51Complications and ill-defined descriptions of heart disease└I51.1Rupture of chordae tendineae, not elsewhere classified
└I51.1Rupture of chordae tendineae, not elsewhere classified