M99 - Biomechanical lesions, not elsewhere classified
M99.4 - Connective tissue stenosis of neural canal
M99.40 - Connective tissue stenosis of neural canal of head region
M99.41 - Connective tissue stenosis of neural canal of cervical region
M99.42 - Connective tissue stenosis of neural canal of thoracic region
M99.43 - Connective tissue stenosis of neural canal of lumbar region
M99.44 - Connective tissue stenosis of neural canal of sacral region
M99.45 - Connective tissue stenosis of neural canal of pelvic region
M99.46 - Connective tissue stenosis of neural canal of lower extremity
M99.47 - Connective tissue stenosis of neural canal of upper extremity
M99.48 - Connective tissue stenosis of neural canal of rib cage
M99.49 - Connective tissue stenosis of neural canal of abdomen and other regions