Other dilated cardiomyopathy
Diseases of the Circulatory System·Dilated cardiomyopathy·subcategory·FY 2027
Cardiomyopathy: Cardiomyopathy is the name for diseases of the heart muscle. These diseases enlarge your heart muscle or make it thicker and more rigid than normal. In rare cases, scar tissue replaces the muscle tissue.
Read more about cardiomyopathy on MedlinePlus · Source: MedlinePlus, National Library of Medicine
Also indexed as: Cardiomyopathy, dilated, specified NEC
Instructional notes
Includes: conditions that are coded here
- Other nonfamilial dilated cardiomyopathy
Also applies, from I42: Cardiomyopathy
These notes sit on I42 and apply to every code under it, including I42.09.
Includes: conditions that are coded here
- myocardiopathy
Excludes2: not included here, code separately if applicable
Code first: code the underlying condition first, then this code
- pre-existing cardiomyopathy complicating pregnancy and puerperium (O99.4)
Where I42.09 sits
- I30-I5A Other forms of heart disease (I30-I5A)
- I42 Cardiomyopathy
- I42.0 Dilated cardiomyopathy
- I42.09 Other dilated cardiomyopathy
MS-DRGs
As the principal diagnosis, this code groups to these MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
Code history
- FY 2026: replaced I42.0 (Dilated cardiomyopathy)