ICD-10-CM · Chapter 9 · I00-I99
I41 Myocarditis in diseases classified elsewhere
Excludes 1 (cannot be coded together)
- myocarditis (in):
- Chagas' disease (chronic) (B57.2)
- acute (B57.0)
- coxsackie (virus) infection (B33.22)
- diphtheritic (A36.81)
- gonococcal (A54.83)
- influenzal (J09.X9, J10.82, J11.82)
- meningococcal (A39.52)
- mumps (B26.82)
- rheumatoid arthritis (M05.31)
- sarcoid (D86.85)
- syphilis (A52.06)
- toxoplasmosis (B58.81)
- tuberculous (A18.84)
Code First
- underlying disease, such as:
- typhus (A75.0-A75.9)
This category is a complete, billable diagnosis code.
No additional specificity is required — submit I41 directly on claims and documentation without a subcode extension.
Last reviewed: September 2026