I51.5 Myocardial degeneration
The ICD-10-CM code for Myocardial degeneration is I51.5 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Section
- I30-I5A: Other forms of heart disease (I30-I5A)
- Category I51
- 12 codes (10 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to I51.5:
- Cardiomyoliposis
- Cardiomalacia
- Myocytolysis
- Disease, diseased › myocardium, myocardial
- Syndrome › Beau's
- Stricture › myocardium, myocardial
- Degeneration, degenerative › myocardial, myocardium (fatty) (hyaline) (senile)
Inclusion Terms
- Fatty degeneration of heart or myocardium
- Myocardial disease
- Senile degeneration of heart or myocardium
U.S. Hospital Utilization
- An estimated 135 U.S. inpatient stays in 2023 included I51.5 among the documented diagnoses.
Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.
Official Coding Guidelines
I11 for I51.5/I51.7; no additional code for specific heart conditionHypertension with heart conditions classified to I51.5, Myocardial degeneration, or I51.7, Cardiomegaly, is assigned to a code from category I11, Hypertensive heart disease. No additional code is assigned to identify the specific heart condition.
Presumed relationship due to Index term “with”The classification presumes a causal relationship between hypertension and heart involvement and between hypertension and kidney involvement, as the two conditions are linked by the term “with” in the Alphabetic Index. These conditions should be coded as related even in the absence of provider documentation explicitly linking them, unless the documentation clearly states the conditions are unrelated.
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026