I11 vs I51.5
I11 (Hypertensive heart disease) compared with I51.5 (Myocardial degeneration), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. I51.5 carries an Excludes1 note covering I11: “myocardial degeneration due to hypertension (I11.-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| I11Hypertensive heart disease | I51.5Myocardial degeneration | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | I00-I99 — Diseases of the Circulatory System (I00-I99) | I00-I99 — Diseases of the Circulatory System (I00-I99) |
| Definition | Hypertensive heart disease is a non-billable ICD-10-CM category code (I11). | Myocardial degeneration is a billable ICD-10-CM diagnosis code (I51.5). |
| Includes | any condition in I50.- or I51.4-I51.7, I51.89, I51.9 due to hypertension | Fatty degeneration of heart or myocardium Myocardial disease Senile degeneration of heart or myocardium |
| Use additional code | code to identify: exposure to environmental tobacco smoke (Z77.22) history of tobacco dependence (Z87.891) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources