ICD-10 Code A39.53 – Meningococcal pericarditis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A39.53 – Meningococcal pericarditis
What it is
A39.53 identifies pericarditis caused by meningococcal infection. Use it when the record shows inflammation of the pericardium linked to Neisseria meningitidis.
Clinical signs
Clinical features may include chest pain, pericardial friction rub, and evidence of pericardial inflammation or effusion. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents meningococcal pericarditis, meningococcal infection involving the pericardium, or a confirmed pericardial complication due to meningococcus. Code it from the documented diagnosis, not from suspected infection alone. Check documentation if the causal organism is not clearly stated.
Do not use for
Do not use this code for pericarditis from other infectious or noninfectious causes, or for meningococcal disease without pericardial involvement. If the chart only says “pericarditis,” you need the documented cause.
Coding tip
Link the pericarditis to meningococcal infection only when the provider clearly documents that relationship.