ICD-10 Code I30.8 – Other forms of acute pericarditis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I30.8 – Other forms of acute pericarditis
What it is
I30.8 identifies acute pericarditis that does not fit the more specific ICD-10 categories. Use it when the record clearly supports acute inflammation of the pericardium, but the documented type is not otherwise classified.
Clinical signs
Typical findings include sharp chest pain, pericardial friction rub, and evidence of pericardial inflammation on exam or imaging. Clinical features vary; refer to documentation.
When to use this code
Use I30.8 when the provider documents acute pericarditis and the case is not described as idiopathic, infectious, rheumatic, or another listed subtype. It is appropriate when the note supports an acute pericardial process but does not name a more specific cause. Check documentation if the etiology is unclear.
Do not use for
Do not use this code for chronic pericarditis or for acute pericarditis with a documented, more specific ICD-10 category. If the record only says chest pain or pericardial effusion without acute pericarditis, do not assign I30.8.
Coding tip
Code the most specific pericarditis type documented; if the subtype is not stated, I30.8 may be the best fit.