Viral myocarditis

This code identifies inflammation of the heart muscle (myocardium) caused by a viral infection. It signifies a direct viral assault on the myocardial tissue, leading to impaired cardiac function.

Apply this code when documentation explicitly states a diagnosis of viral myocarditis, often supported by laboratory findings confirming a viral etiology and cardiac imaging showing myocardial inflammation. This code is appropriate for both acute and chronic presentations of virally induced myocardial inflammation.

• Ensure documentation specifies a viral cause; if the cause is unknown or non-viral, a different myocarditis code is required.
• Code any associated heart failure or other cardiac complications separately.
• Review the medical record for specific viral agents identified (e.g., enterovirus, adenovirus) as more specific codes may be available if the viral agent is known.