| M33.0 | Juvenile dermatomyositis | NON-BILLABLE CODE |
| M33.00 | Juvenile dermatomyositis, organ involvement unspecified | BILLABLE CODE |
| M33.01 | Juvenile dermatomyositis with respiratory involvement | BILLABLE CODE |
| M33.02 | Juvenile dermatomyositis with myopathy | BILLABLE CODE |
| M33.03 | Juvenile dermatomyositis without myopathy | BILLABLE CODE |
| M33.09 | Juvenile dermatomyositis with other organ involvement | BILLABLE CODE |
| M33.1 | Other dermatomyositis | NON-BILLABLE CODE |
| M33.10 | Other dermatomyositis, organ involvement unspecified | BILLABLE CODE |
| M33.11 | Other dermatomyositis with respiratory involvement | BILLABLE CODE |
| M33.12 | Other dermatomyositis with myopathy | BILLABLE CODE |
| M33.13 | Other dermatomyositis without myopathy | BILLABLE CODE |
| M33.19 | Other dermatomyositis with other organ involvement | BILLABLE CODE |
| M33.2 | Polymyositis | NON-BILLABLE CODE |
| M33.20 | Polymyositis, organ involvement unspecified | BILLABLE CODE |
| M33.21 | Polymyositis with respiratory involvement | BILLABLE CODE |
| M33.22 | Polymyositis with myopathy | BILLABLE CODE |
| M33.29 | Polymyositis with other organ involvement | BILLABLE CODE |
| M33.9 | Dermatopolymyositis, unspecified | NON-BILLABLE CODE |
| M33.90 | Dermatopolymyositis, unspecified, organ involvement unspecified | BILLABLE CODE |
| M33.91 | Dermatopolymyositis, unspecified with respiratory involvement | BILLABLE CODE |
| M33.92 | Dermatopolymyositis, unspecified with myopathy | BILLABLE CODE |
| M33.93 | Dermatopolymyositis, unspecified without myopathy | BILLABLE CODE |
| M33.99 | Dermatopolymyositis, unspecified with other organ involvement | BILLABLE CODE |
