M33.2Non-Billable (Header)PolymyositisChild CodesM33.20Polymyositis, organ involvement unspecifiedHCC 93M33.21Polymyositis with respiratory involvementM33.22Polymyositis with myopathyHCC 93M33.29Polymyositis with other organ involvementHCC 93Code Hierarchy└M33Dermatopolymyositis└M33.2Polymyositis└M33.2Polymyositis