| S12.100 | Unspecified displaced fracture of second cervical vertebra | NON-BILLABLE CODE |
| S12.100A | Unspecified displaced fracture of second cervical vertebra, initial encounter for closed fracture | BILLABLE CODE |
| S12.100B | Unspecified displaced fracture of second cervical vertebra, initial encounter for open fracture | BILLABLE CODE |
| S12.100D | Unspecified displaced fracture of second cervical vertebra, subsequent encounter for fracture with routine healing | BILLABLE CODE |
| S12.100G | Unspecified displaced fracture of second cervical vertebra, subsequent encounter for fracture with delayed healing | BILLABLE CODE |
| S12.100K | Unspecified displaced fracture of second cervical vertebra, subsequent encounter for fracture with nonunion | BILLABLE CODE |
| S12.100S | Unspecified displaced fracture of second cervical vertebra, sequela | BILLABLE CODE |
| S12.101 | Unspecified nondisplaced fracture of second cervical vertebra | NON-BILLABLE CODE |
| S12.101A | Unspecified nondisplaced fracture of second cervical vertebra, initial encounter for closed fracture | BILLABLE CODE |
| S12.101B | Unspecified nondisplaced fracture of second cervical vertebra, initial encounter for open fracture | BILLABLE CODE |
| S12.101D | Unspecified nondisplaced fracture of second cervical vertebra, subsequent encounter for fracture with routine healing | BILLABLE CODE |
| S12.101G | Unspecified nondisplaced fracture of second cervical vertebra, subsequent encounter for fracture with delayed healing | BILLABLE CODE |
| S12.101K | Unspecified nondisplaced fracture of second cervical vertebra, subsequent encounter for fracture with nonunion | BILLABLE CODE |
| S12.101S | Unspecified nondisplaced fracture of second cervical vertebra, sequela | BILLABLE CODE |
