| S12.030 | Displaced posterior arch fracture of first cervical vertebra | NON-BILLABLE CODE |
| S12.030A | Displaced posterior arch fracture of first cervical vertebra, initial encounter for closed fracture | BILLABLE CODE |
| S12.030B | Displaced posterior arch fracture of first cervical vertebra, initial encounter for open fracture | BILLABLE CODE |
| S12.030D | Displaced posterior arch fracture of first cervical vertebra, subsequent encounter for fracture with routine healing | BILLABLE CODE |
| S12.030G | Displaced posterior arch fracture of first cervical vertebra, subsequent encounter for fracture with delayed healing | BILLABLE CODE |
| S12.030K | Displaced posterior arch fracture of first cervical vertebra, subsequent encounter for fracture with nonunion | BILLABLE CODE |
| S12.030S | Displaced posterior arch fracture of first cervical vertebra, sequela | BILLABLE CODE |
| S12.031 | Nondisplaced posterior arch fracture of first cervical vertebra | NON-BILLABLE CODE |
| S12.031A | Nondisplaced posterior arch fracture of first cervical vertebra, initial encounter for closed fracture | BILLABLE CODE |
| S12.031B | Nondisplaced posterior arch fracture of first cervical vertebra, initial encounter for open fracture | BILLABLE CODE |
| S12.031D | Nondisplaced posterior arch fracture of first cervical vertebra, subsequent encounter for fracture with routine healing | BILLABLE CODE |
| S12.031G | Nondisplaced posterior arch fracture of first cervical vertebra, subsequent encounter for fracture with delayed healing | BILLABLE CODE |
| S12.031K | Nondisplaced posterior arch fracture of first cervical vertebra, subsequent encounter for fracture with nonunion | BILLABLE CODE |
| S12.031S | Nondisplaced posterior arch fracture of first cervical vertebra, sequela | BILLABLE CODE |
