Spondylolysis, lumbar region

This code signifies a defect or stress fracture in the pars interarticularis of one or more vertebrae specifically located in the lumbar spine. This condition can lead to instability and is a common cause of low back pain, particularly in adolescents and athletes.

Apply this code when documentation clearly states a diagnosis of spondylolysis affecting the lumbar region. This diagnosis is typically confirmed by imaging studies such as X-rays, CT scans, or MRI, showing a pars defect. It is often seen in patients presenting with chronic low back pain exacerbated by activity.

• Ensure the documentation specifies "spondylolysis" and not "spondylolisthesis," which is a different condition (vertebral slippage).
• Do not confuse with M47.816 (Other spondylosis, lumbar region), which refers to degenerative changes rather than a pars defect.
• Look for laterality if specified, though spondylolysis is often bilateral. If not specified, this code is appropriate.