| M43.0 | Spondylolysis | NON-BILLABLE CODE |
| M43.00 | Spondylolysis, site unspecified | BILLABLE CODE |
| M43.01 | Spondylolysis, occipito-atlanto-axial region | BILLABLE CODE |
| M43.02 | Spondylolysis, cervical region | BILLABLE CODE |
| M43.03 | Spondylolysis, cervicothoracic region | BILLABLE CODE |
| M43.04 | Spondylolysis, thoracic region | BILLABLE CODE |
| M43.05 | Spondylolysis, thoracolumbar region | BILLABLE CODE |
| M43.06 | Spondylolysis, lumbar region | BILLABLE CODE |
| M43.07 | Spondylolysis, lumbosacral region | BILLABLE CODE |
| M43.08 | Spondylolysis, sacral and sacrococcygeal region | BILLABLE CODE |
| M43.09 | Spondylolysis, multiple sites in spine | BILLABLE CODE |
| M43.1 | Spondylolisthesis | NON-BILLABLE CODE |
| M43.10 | Spondylolisthesis, site unspecified | BILLABLE CODE |
| M43.11 | Spondylolisthesis, occipito-atlanto-axial region | BILLABLE CODE |
| M43.12 | Spondylolisthesis, cervical region | BILLABLE CODE |
| M43.13 | Spondylolisthesis, cervicothoracic region | BILLABLE CODE |
| M43.14 | Spondylolisthesis, thoracic region | BILLABLE CODE |
| M43.15 | Spondylolisthesis, thoracolumbar region | BILLABLE CODE |
| M43.16 | Spondylolisthesis, lumbar region | BILLABLE CODE |
| M43.17 | Spondylolisthesis, lumbosacral region | BILLABLE CODE |
| M43.18 | Spondylolisthesis, sacral and sacrococcygeal region | BILLABLE CODE |
| M43.19 | Spondylolisthesis, multiple sites in spine | BILLABLE CODE |
| M43.2 | Fusion of spine | NON-BILLABLE CODE |
| M43.20 | Fusion of spine, site unspecified | BILLABLE CODE |
| M43.21 | Fusion of spine, occipito-atlanto-axial region | BILLABLE CODE |
| M43.22 | Fusion of spine, cervical region | BILLABLE CODE |
| M43.23 | Fusion of spine, cervicothoracic region | BILLABLE CODE |
| M43.24 | Fusion of spine, thoracic region | BILLABLE CODE |
| M43.25 | Fusion of spine, thoracolumbar region | BILLABLE CODE |
| M43.26 | Fusion of spine, lumbar region | BILLABLE CODE |
| M43.27 | Fusion of spine, lumbosacral region | BILLABLE CODE |
| M43.28 | Fusion of spine, sacral and sacrococcygeal region | BILLABLE CODE |
| M43.3 | Recurrent atlantoaxial dislocation with myelopathy | BILLABLE CODE |
| M43.4 | Other recurrent atlantoaxial dislocation | BILLABLE CODE |
| M43.5 | Other recurrent vertebral dislocation | NON-BILLABLE CODE |
| M43.5X | Other recurrent vertebral dislocation | NON-BILLABLE CODE |
| M43.5X2 | Other recurrent vertebral dislocation, cervical region | BILLABLE CODE |
| M43.5X3 | Other recurrent vertebral dislocation, cervicothoracic region | BILLABLE CODE |
| M43.5X4 | Other recurrent vertebral dislocation, thoracic region | BILLABLE CODE |
| M43.5X5 | Other recurrent vertebral dislocation, thoracolumbar region | BILLABLE CODE |
| M43.5X6 | Other recurrent vertebral dislocation, lumbar region | BILLABLE CODE |
| M43.5X7 | Other recurrent vertebral dislocation, lumbosacral region | BILLABLE CODE |
| M43.5X8 | Other recurrent vertebral dislocation, sacral and sacrococcygeal region | BILLABLE CODE |
| M43.5X9 | Other recurrent vertebral dislocation, site unspecified | BILLABLE CODE |
| M43.6 | Torticollis | BILLABLE CODE |
| M43.8 | Other specified deforming dorsopathies | NON-BILLABLE CODE |
| M43.8X | Other specified deforming dorsopathies | NON-BILLABLE CODE |
| M43.8X1 | Other specified deforming dorsopathies, occipito-atlanto-axial region | BILLABLE CODE |
| M43.8X2 | Other specified deforming dorsopathies, cervical region | BILLABLE CODE |
| M43.8X3 | Other specified deforming dorsopathies, cervicothoracic region | BILLABLE CODE |
| M43.8X4 | Other specified deforming dorsopathies, thoracic region | BILLABLE CODE |
| M43.8X5 | Other specified deforming dorsopathies, thoracolumbar region | BILLABLE CODE |
| M43.8X6 | Other specified deforming dorsopathies, lumbar region | BILLABLE CODE |
| M43.8X7 | Other specified deforming dorsopathies, lumbosacral region | BILLABLE CODE |
| M43.8X8 | Other specified deforming dorsopathies, sacral and sacrococcygeal region | BILLABLE CODE |
| M43.8X9 | Other specified deforming dorsopathies, site unspecified | BILLABLE CODE |
| M43.9 | Deforming dorsopathy, unspecified | BILLABLE CODE |
