M45: Ankylosing spondylitis inclusionTerm Rheumatoid arthritis of spine excludes1 arthropathy in Reiter's disease (M02.3-) juvenile (ankylosing) spondylitis (M08.1) excludes2 Behçet's disease (M35.2) |
| M45.0: Ankylosing spondylitis of multiple sites in spine |
| M45.1: Ankylosing spondylitis of occipito-atlanto-axial region |
| M45.2: Ankylosing spondylitis of cervical region |
| M45.3: Ankylosing spondylitis of cervicothoracic region |
| M45.4: Ankylosing spondylitis of thoracic region |
| M45.5: Ankylosing spondylitis of thoracolumbar region |
| M45.6: Ankylosing spondylitis lumbar region |
| M45.7: Ankylosing spondylitis of lumbosacral region |
| M45.8: Ankylosing spondylitis sacral and sacrococcygeal region |
| M45.9: Ankylosing spondylitis of unspecified sites in spine |
| M45.A: Non-radiographic axial spondyloarthritis |