Fusion of spine, lumbar region

This code signifies an abnormal joining or growing together of vertebrae in the lower back, specifically the lumbar region of the spine. This fusion can be congenital, occurring during development, or acquired due to disease, trauma, or surgical intervention. It results in a loss of motion between the affected vertebral segments.

Apply this code when documentation clearly indicates a diagnosis of spinal fusion affecting the lumbar region. This includes conditions like congenital block vertebrae, ankylosing spondylitis with lumbar fusion, or post-surgical arthrodesis of the lumbar spine where the fusion itself is the primary diagnostic focus. Ensure the physician's notes specify the lumbar location.

• Differentiate between congenital fusion and acquired fusion; this code covers both, but additional codes may be needed for the underlying cause of acquired fusion.
• Do not use this code for a history of spinal fusion if the patient is presenting for a different, current spinal condition.
• Consider sequencing this code as a secondary diagnosis if the primary reason for the encounter is a complication of the fusion or a related but distinct spinal condition.