Connective tiss stenosis of neural canal of upper extremity

This code signifies a narrowing of the neural canal within the upper extremity due to an overgrowth or thickening of connective tissue. This stenosis can compress nerves, leading to symptoms such as pain, numbness, tingling, and weakness in the arm or hand. It represents a structural impingement on neural elements.

Apply this code when documentation explicitly states connective tissue is the cause of neural canal stenosis in the upper limb. This typically arises from conditions like hypertrophic ligamentum flavum, scar tissue formation, or other fibrotic changes. Supporting documentation should include imaging reports (e.g., MRI, CT) confirming the stenosis and the specific etiology.

• Specify the exact upper extremity (left or right) if documented, as laterality may be indicated by a fifth or sixth character.
• Distinguish from stenosis caused by bone (e.g., osteophytes) or disc material, which would use different M-codes.
• Always code the underlying cause of the connective tissue overgrowth if known and documented (e.g., post-surgical scarring, inflammatory arthropathy).