- Ankylosing M45.9

-- With Lung Involvement M45.9 [J99]

-- Cervical Region M45.2

-- Cervicothoracic Region M45.3

-- Juvenile M08.1

-- Lumbar Region M45.6

-- Lumbosacral Region M45.7

-- Multiple Sites M45.0

-- Occipito-atlanto-axial Region M45.1

-- Sacrococcygeal Region M45.8

-- Thoracic Region M45.4

-- Thoracolumbar Region M45.5