Fusion of spine, cervical region

This code describes the pathological joining or growing together of two or more vertebrae in the cervical spine. This fusion can be congenital (present at birth) or acquired due to disease processes such as ankylosing spondylitis, severe degenerative disc disease, or trauma. It results in reduced mobility and can lead to neurological symptoms if nerve roots or the spinal cord are compressed.

Use this code when documentation clearly indicates a pathological fusion of cervical vertebrae, not a surgically induced fusion. This diagnosis is supported by imaging studies (e.g., X-ray, MRI, CT scan) showing bony bridging between vertebral bodies in the cervical region. It is often seen in conditions like Klippel-Feil syndrome or advanced spondylosis.

• Do not use this code for post-procedural fusion (arthrodesis) resulting from surgical intervention; use Z98.1 for that scenario.
• Distinguish between congenital fusion and acquired fusion; if congenital, consider additional codes for associated anomalies.
• Always review imaging reports and physician notes to confirm the etiology (congenital vs. acquired) and the specific vertebral levels involved, if documented.