422 Acute myocarditis 
422.0 Acute myocarditis in diseases classified elsewhere convert 422.0 to ICD-10-CM
422.9 Other and unspecified acute myocarditis 
422.90 Acute myocarditis unspecified convert 422.90 to ICD-10-CM 422.91 Idiopathic myocarditis convert 422.91 to ICD-10-CM 422.92 Septic myocarditis convert 422.92 to ICD-10-CM 422.93 Toxic myocarditis convert 422.93 to ICD-10-CM 422.99 Other acute myocarditis convert 422.99 to ICD-10-CM