I51.8

I51.8: Other ill-defined heart diseases

Non-billable headerICD-10-CM

I51.8 is a non-billable header ICD-10-CM code for other ill-defined heart diseases. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2 inherited from the categories above I51.8

Not part of this code, but both may be coded when both are present.

Written on I51: Complications and ill-defined descriptions of heart disease

heart disease specified as rheumatic (I00-I09)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead I51.8

2 child codes. Green means billable.

I51.81Takotsubo syndrome
I51.89Other ill-defined heart diseases

Other codes under I51

I51.0Cardiac septal defect, acquired
I51.1Rupture of chordae tendineae, not elsewhere classified
I51.2Rupture of papillary muscle, not elsewhere classified
I51.3Intracardiac thrombosis, not elsewhere classified
I51.4Myocarditis, unspecified
I51.5Myocardial degeneration
I51.7Cardiomegaly
I51.9Heart disease, unspecified