Spondylolysis, cervicothoracic region

This code identifies a defect or stress fracture in the pars interarticularis of the vertebrae specifically located in the cervicothoracic spinal region. This condition can lead to instability and pain, often resulting from repetitive stress or trauma.

Assign this code when documentation clearly indicates spondylolysis affecting the cervical and/or thoracic spine. This diagnosis is typically supported by imaging studies such as X-rays, CT scans, or MRIs, confirming the pars defect in the specified region.

• Ensure the documentation specifies the cervicothoracic region; do not use for other spinal segments.
• Distinguish from spondylolisthesis, which involves vertebral slippage, though spondylolysis can be a precursor.
• Look for laterality if specified, though this code does not differentiate left/right.