Myocarditis, unspecified

This code represents inflammation of the heart muscle (myocardium) when the specific type or cause of myocarditis is not documented. It indicates a general diagnosis of myocarditis without further detail regarding its acuity or etiology.

Use this code when the physician's documentation clearly states "myocarditis" but does not specify if it is acute, subacute, or chronic, or provide information about its underlying cause. This code is appropriate when the clinical picture suggests myocarditis, but the provider has not elaborated on its specific characteristics.

• Avoid using this code if the documentation specifies acute or subacute myocarditis; refer to the I40.- series.
• Query the provider for clarification on the acuity (acute, subacute, chronic) and etiology of myocarditis whenever possible to allow for more specific coding.
• This code is a less specific option and should only be used when more precise documentation is unavailable.