Pericarditis in diseases classified elsewhere

This code signifies inflammation of the pericardium (the sac surrounding the heart) when it is a manifestation or complication of another underlying systemic disease. It indicates that the pericarditis is secondary to a condition classified elsewhere in the ICD-10-CM system, rather than being a primary or idiopathic pericardial disease.

Use this code when documentation clearly links pericarditis to a specific underlying disease that has its own distinct ICD-10-CM code. Examples include pericarditis due to metabolic disorders, certain infectious diseases not specifically excluded, or other systemic conditions where the pericardial involvement is a secondary effect. The medical record must specify the primary condition causing the pericarditis.

• Always sequence the underlying systemic disease first, followed by this code for the pericarditis.
• Carefully review the "Excludes1" list to ensure the specific type of pericarditis is not already classified elsewhere with a more precise code.
• Avoid using this code if the pericarditis is idiopathic, acute, or chronic without a clearly identified underlying systemic cause; instead, refer to codes in category I30 or I31.