I42.2
BillableOther hypertrophic cardiomyopathy
HCC Category Mapping
V28HCC 227 — Cardiomyopathy
0.339V24HCC 85 — Congestive Heart Failure
0.368ESRDHCC 85 — Congestive Heart Failure
0.000RxHCCHCC 186 — Heart Failure
0.000What This Code Means
A condition where the heart muscle becomes abnormally thick without obstructing blood flow, which can affect the heart's ability to relax and fill properly.
Coding Tips
- •Distinguish between obstructive (I42.1) and non-obstructive forms based on hemodynamic findings
- •Document any associated conditions such as hypertension or aortic stenosis
Clinical Significance
Other (non-obstructive) hypertrophic cardiomyopathy involves abnormal thickening of the heart muscle without obstructing blood flow from the left ventricle. While generally less dangerous than the obstructive form, it still carries risk of arrhythmias, diastolic dysfunction, and sudden cardiac death. Ongoing monitoring and potential device therapy may be required.
Documentation Requirements
- ✓Provider diagnosis of hypertrophic cardiomyopathy, non-obstructive type
- ✓Echocardiographic findings showing ventricular hypertrophy without outflow tract obstruction
- ✓Documentation distinguishing from obstructive form (I42.1)
- ✓Assessment for arrhythmia risk and sudden cardiac death risk factors
- ✓Family history screening and genetic counseling documentation
Commonly Confused Codes
I42.1 — Obstructive hypertrophic cardiomyopathy; has left ventricular outflow tract obstructionI11.0 — Hypertensive heart disease with heart failure; hypertrophy from hypertension, not cardiomyopathyI42.0 — Dilated cardiomyopathy; dilation rather than hypertrophyI42.9 — Cardiomyopathy, unspecified; less specific