Spondylolysis, sacral and sacrococcygeal region

This code signifies a defect or stress fracture in the pars interarticularis of the sacrum or the sacrococcygeal junction. It represents a structural anomaly in the posterior arch of these vertebral segments, often leading to instability or pain. This condition can be congenital or acquired due to repetitive stress.

Apply this code when documentation explicitly states spondylolysis affecting the sacrum or the sacrococcygeal region. This diagnosis is typically supported by imaging studies such as X-rays, CT scans, or MRIs demonstrating the pars defect. Use for patients presenting with localized low back pain, especially if exacerbated by extension.

• Ensure the documentation specifies the sacral or sacrococcygeal region; do not use for spondylolysis in other spinal segments.
• Do not confuse with spondylolisthesis (M43.1-), which involves anterior displacement of a vertebra, though spondylolysis can be a precursor.
• Code any associated pain or neurological symptoms separately, following sequencing guidelines.