• Diseases of the musculoskeletal system and connective tissue

        • M45 - Ankylosing spondylitis
        • 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
        • M45.A0 - Non-radiographic axial spondyloarthritis unsp site in spin
        • M45.A1 - Non-radiographic axial spondyloarthritis occipt-atlan-ax rgn
        • M45.A2 - Non-radiographic axial spondyloarthritis of cervical region
        • M45.A3 - Non-radiographic axial spondyloarthritis of cervicothor rgn
        • M45.A4 - Non-radiographic axial spondyloarthritis of thoracic region
        • M45.A5 - Non-radiographic axial spondyloarthritis of thrclm region
        • M45.A6 - Non-radiographic axial spondyloarthritis of lumbar region
        • M45.A7 - Non-radiographic axial spondyloarthritis of lumbosacr region
        • M45.A8 - Non-radiographic axial spondyloarthritis sacr/sacrocygl rgn
        • M45.AB - Non-radiographic axial spondyloarthritis mult site in spine