2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Other Forms Of Heart Disease 420-429 > ICD-9-CM Diagnosis 422 Acute myocarditis 422 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 422.0 Acute myocarditis in diseases classified elsewhere 422.0 is a specific code that can be used to specify a diagnosis 422.0 contains 14 index entries ICD-9-CM Diagnosis 422.9 Other and unspecified acute myocarditis 422.9 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 422.90 Acute myocarditis unspecified 422.90 is a specific code that can be used to specify a diagnosis 422.90 contains 6 index entries ICD-9-CM Diagnosis 422.91 Idiopathic myocarditis 422.91 is a specific code that can be used to specify a diagnosis 422.91 contains 13 index entries ICD-9-CM Diagnosis 422.92 Septic myocarditis 422.92 is a specific code that can be used to specify a diagnosis 422.92 contains 7 index entries ICD-9-CM Diagnosis 422.93 Toxic myocarditis 422.93 is a specific code that can be used to specify a diagnosis 422.93 contains 1 index entry ICD-9-CM Diagnosis 422.99 Other acute myocarditis 422.99 is a specific code that can be used to specify a diagnosis 422.99 contains 2 index entries