Spondylolysis, thoracolumbar region

This code identifies a defect or stress fracture in the pars interarticularis of a vertebra within the thoracolumbar spine. This condition represents a bony separation, often due to repetitive stress, without displacement of the vertebral body. It can be unilateral or bilateral.

Apply this code when documentation explicitly states spondylolysis affecting the thoracic or lumbar spine. This is commonly seen in athletes or individuals with occupations involving repetitive spinal extension. Supporting documentation includes imaging reports (e.g., X-ray, CT, MRI) confirming a pars defect in the specified region.

• Differentiate from spondylolisthesis (M43.1-), which involves vertebral body displacement.
• Ensure the documentation specifies the thoracolumbar region; if only lumbar or thoracic is noted, a more specific code may be available.
• Look for laterality if documented, though this code does not specify it.