ICD-10-CM > A00-B99 > B25-B34 > B33 > B33.2 B33.2 Viral carditis Non-Billable/Non-Specific Applicable To Coxsackie (virus) carditis Codes B33.20Viral carditis, unspecifiedB33.21Viral endocarditisB33.22Viral myocarditisB33.23Viral pericarditisB33.24Viral cardiomyopathy