Connective tissue stenosis of neural canal of lumbar region

This code describes a narrowing of the spinal canal in the lower back (lumbar region) specifically due to an overgrowth or thickening of connective tissues. This stenosis can compress the spinal cord or nerve roots, leading to neurological symptoms.

Apply this code when documentation explicitly states lumbar spinal stenosis caused by connective tissue involvement, such as ligamentum flavum hypertrophy or facet joint capsular thickening. It is appropriate when the etiology of the stenosis is clearly identified as connective tissue, rather than bony or disc-related.

• Differentiate from other causes of lumbar stenosis (e.g., disc herniation, spondylosis) which have distinct codes.
• Ensure the documentation specifies "connective tissue" as the cause; otherwise, a more general stenosis code may be appropriate.
• Consider sequencing with codes for associated neurological symptoms (e.g., radiculopathy, claudication) if present.