Viral pericarditis

This code identifies inflammation of the pericardium, the sac surrounding the heart, specifically caused by a viral infection. It represents an acute or subacute inflammatory process affecting the outer layer of the heart, leading to symptoms such as chest pain, fever, and sometimes pericardial effusion.

Use this code when documentation explicitly states a diagnosis of pericarditis confirmed or highly suspected to be of viral etiology. This typically follows a clinical presentation consistent with viral infection and exclusion of other causes, often supported by laboratory findings or imaging.

• Ensure the documentation clearly specifies a viral cause; if the cause is unknown, use an unspecified pericarditis code.
• Do not confuse with bacterial or other non-viral forms of pericarditis; the etiology must be clearly viral.
• Code any associated pericardial effusion separately if documented and not inherent to the pericarditis diagnosis.