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 2x1 Spinal instabilities, occipito-atlanto-axial region
 * M53.2x2 Spinal instabilities, cervical region
 * M53.2x3 Spinal instabilities, cervicothoracic region
 * M53.2x4 Spinal instabilities, thoracic region
 * M53.2x5 Spinal instabilities, thoracolumbar region
 * M53.2x6 Spinal instabilities, lumbar region
 * M53.2x7 Spinal instabilities, lumbosacral region
 * M53.2x8 Spinal instabilities, sacral and sacrococcygeal region
 * M53.2x9 Spinal instabilities, site unspecified
 * M53.3 Sacrococcygeal disorders, not elsewhere classified
 * Coccygodynia
 * M53.8 Other specified dorsopathies
 * M53.80 Other specified dorsopathies, site unspecified
 * M53.81 Other specified dorsopathies, occipito-atlanto-axial region
 * M53.82 Other specified dorsopathies, cervical region
 * M53.83 Other specified dorsopathies, cervicothoracic region
 * M53.84 Other specified dorsopathies, thoracic region
 * M53.85 Other specified dorsopathies, thoracolumbar region
 * M53.86 Other specified dorsopathies, lumbar region
 * M53.87 Other specified dorsopathies, lumbosacral region
 * M53.88 Other specified dorsopathies, sacral and sacrococcygeal region
 * M53.9 Dorsopathy, unspecified

M54 Dorsalgia

 * Excludes1: psychogenic dorsalgia (F45.41)
 * M54.0 Panniculitis affecting regions of neck and back
 * Excludes1: lupus panniculitis (L93.2)
 * panniculitis NOS (M79.3)
 * relapsing [Weber-Christian] panniculitis (M35.6)
 * M54.00 Panniculitis affecting regions of neck and back, site unspecified
 * M54.01 Panniculitis affecting regions of neck and back, occipito-atlanto-axial region
 * M54.02 Panniculitis affecting regions of neck and back, cervical region
 * M54.03 Panniculitis affecting regions of neck and back, cervicothoracic region
 * M54.04 Panniculitis affecting regions of neck and back, thoracic region
 * M54.05 Panniculitis affecting regions of neck and back, thoracolumbar region
 * M54.06 Panniculitis affecting regions of neck and back, lumbar region
 * M54.