M45.1
Ankylosing spondylitis, occipito-atlanto-axial region
✦ New in TT06 (absent from QĐ4469)
Sibling codes
M45Ankylosing spondylitisM45.0Ankylosing spondylitis, multiple sites in spineM45.2Ankylosing spondylitis, cervical regionM45.3Ankylosing spondylitis, cervicothoracic regionM45.4Ankylosing spondylitis, thoracic regionM45.5Ankylosing spondylitis, thoracolumbar regionM45.6Ankylosing spondylitis, lumbar regionM45.7Ankylosing spondylitis, lumbosacral regionM45.8Ankylosing spondylitis, sacral and sacrococcygeal regionM45.9Ankylosing spondylitis, site unspecified