Spinal instabilities, sacral and sacrococcygeal region

This code signifies a loss of structural integrity or abnormal movement within the sacral or sacrococcygeal spine. This instability can lead to pain, neurological symptoms, and functional impairment due to excessive motion between vertebrae in this region. It represents a biomechanical dysfunction rather than a fracture or dislocation.

Apply this code when documentation explicitly states "spinal instability" or "segmental instability" localized to the sacrum or sacrococcygeal joint. This often arises from ligamentous laxity, degenerative changes, or prior trauma affecting the stability of these spinal segments. Supporting documentation should include imaging findings (e.g., dynamic X-rays, MRI) demonstrating abnormal motion or clinical findings indicative of instability.

• Ensure the documentation clearly specifies "instability" and not just pain or degeneration without evidence of abnormal motion.
• Do not confuse with sacral fractures (S32.1-) or sacralgia (M53.3) unless instability is also explicitly documented.
• Always code any associated pain (e.g., M54.5 for low back pain) as a secondary diagnosis, if applicable and documented.