| T33.90 | Superficial frostbite of unspecified sites | NON-BILLABLE CODE |
| T33.90XA | Superficial frostbite of unspecified sites, initial encounter | BILLABLE CODE |
| T33.90XD | Superficial frostbite of unspecified sites, subsequent encounter | BILLABLE CODE |
| T33.90XS | Superficial frostbite of unspecified sites, sequela | BILLABLE CODE |
| T33.99 | Superficial frostbite of other sites | NON-BILLABLE CODE |
| T33.99XA | Superficial frostbite of other sites, initial encounter | BILLABLE CODE |
| T33.99XD | Superficial frostbite of other sites, subsequent encounter | BILLABLE CODE |
| T33.99XS | Superficial frostbite of other sites, sequela | BILLABLE CODE |
