| Sub-classification | Description |
|---|
| M54.0 | Panniculitis affecting regions of neck and back |
| M54.00 | Multiple sites in spine |
| M54.01 | Occipito-atlanto-axial region |
| M54.02 | Cervical region |
| M54.03 | Cervicothoracic region |
| M54.04 | Thoracic region |
| M54.05 | Thoracolumbar region |
| M54.06 | Lumbar region |
| M54.07 | Lumbosacral region |
| M54.08 | Sacral and sacrococcygeal region |
| M54.09 | Site unspecified |
| M54.1 | Radiculopathy |
| M54.10 | Multiple sites in spine |
| M54.11 | Occipito-atlanto-axial region |
| M54.12 | Cervical region |
| M54.13 | Cervicothoracic region |
| M54.14 | Thoracic region |
| M54.15 | Thoracolumbar region |
| M54.16 | Lumbar region |
| M54.17 | Lumbosacral region |
| M54.18 | Sacral and sacrococcygeal region |
| M54.19 | Site unspecified |
| M54.2 | Cervicalgia |
| M54.21 | Occipito-atlanto-axial region |
| M54.22 | Cervical region |
| M54.23 | Cervicothoracic region |
| M54.3 | Sciatica |
| M54.30 | Multiple sites in spine |
| M54.35 | Thoracolumbar region |
| M54.36 | Lumbar region |
| M54.37 | Lumbosacral region |
| M54.38 | Sacral and sacrococcygeal region |
| M54.39 | Site unspecified |
| M54.4 | Lumbago with sciatica |
| M54.40 | Multiple sites in spine |
| M54.45 | Thoracolumbar region |
| M54.46 | Lumbar region |
| M54.47 | Lumbosacral region |
| M54.48 | Sacral and sacrococcygeal region |
| M54.49 | Site unspecified |
| M54.5 | Low back pain |
| M54.50 | Multiple sites in spine |
| M54.55 | Thoracolumbar region |
| M54.56 | Lumbar region |
| M54.57 | Lumbosacral region |
| M54.58 | Sacral and sacrococcygeal region |
| M54.59 | Site unspecified |
| M54.6 | Pain in thoracic spine |
| M54.60 | Multiple sites in spine |
| M54.63 | Cervicothoracic region |
| M54.64 | Thoracic region |
| M54.65 | Thoracolumbar region |
| M54.8 | Other dorsalgia |
| M54.80 | Multiple sites in spine |
| M54.81 | Occipito-atlanto-axial region |
| M54.82 | Cervical region |
| M54.83 | Cervicothoracic region |
| M54.84 | Thoracic region |
| M54.85 | Thoracolumbar region |
| M54.86 | Lumbar region |
| M54.87 | Lumbosacral region |
| M54.88 | Sacral and sacrococcygeal region |
| M54.89 | Site unspecified |
| M54.9 | Dorsalgia, unspecified |
| M54.90 | Multiple sites in spine |
| M54.91 | Occipito-atlanto-axial region |
| M54.92 | Cervical region |
| M54.93 | Cervicothoracic region |
| M54.94 | Thoracic region |
| M54.95 | Thoracolumbar region |
| M54.96 | Lumbar region |
| M54.97 | Lumbosacral region |
| M54.98 | Sacral and sacrococcygeal region |
| M54.99 | Site unspecified |
