M45 | Ankylosing spondylitis |
| Ankylosing spondylitis of multiple sites in spine |
| Ankylosing spondylitis of occipito-atlanto-axial region |
| Ankylosing spondylitis of cervical region |
| Ankylosing spondylitis of cervicothoracic region |
| Ankylosing spondylitis of thoracic region |
| Ankylosing spondylitis of thoracolumbar region |
| Ankylosing spondylitis lumbar region |
| Ankylosing spondylitis of lumbosacral region |
| Ankylosing spondylitis sacral and sacrococcygeal region |
| Ankylosing spondylitis of unspecified sites in spine |
| Non-radiographic axial spondyloarthritis |
| Non-radiographic axial spondyloarthritis, of unspecified sites in spine |
| Non-radiographic axial spondyloarthritis, of occipito-atlanto-axial region |
| Non-radiographic axial spondyloarthritis, of cervical region |
| Non-radiographic axial spondyloarthritis, of cervicothoracic region |
| Non-radiographic axial spondyloarthritis, of thoracic region |
| Non-radiographic axial spondyloarthritis, of thoracolumbar region |
| Non-radiographic axial spondyloarthritis, of lumbar region |
| Non-radiographic axial spondyloarthritis, of lumbosacral region |
| Non-radiographic axial spondyloarthritis, of sacral and sacrococcygeal region |
| Non-radiographic axial spondyloarthritis, of multiple sites in spine |