I42
ICD-10Non-billable categoryCardiomyopathy
Official ICD-10-CM descriptor (FY2026)
Cardiomyopathy
I42 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Includes
- myocardiopathy
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- ischemic cardiomyopathy (I25.5)
- peripartum cardiomyopathy (O90.3)
- ventricular hypertrophy (I51.7)
Code first
Sequence the underlying condition before this code.
- pre-existing cardiomyopathy complicating pregnancy and puerperium (O99.4)
More specific codes under I42
- I42.0Dilated cardiomyopathy
- I42.1Obstructive hypertrophic cardiomyopathy
- I42.2Other hypertrophic cardiomyopathy
- I42.3Endomyocardial (eosinophilic) disease
- I42.4Endocardial fibroelastosis
- I42.5Other restrictive cardiomyopathy
- I42.6Alcoholic cardiomyopathy
- I42.7Cardiomyopathy due to drug and external agent
- I42.8Other cardiomyopathies
- I42.9Cardiomyopathy, unspecified
Where this code sits
Krasyn AI Coder
Get code suggestions automatically as you type notes. Free for 50 analyses.
Install for Chrome — freeSource
ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.