Injury of trigeminal nerve, left side, initial encounter

This code signifies a traumatic injury affecting the left trigeminal nerve, which is responsible for sensation in the face and motor functions like chewing. Such an injury can result in pain, numbness, or weakness in the left side of the face, jaw, or oral cavity.

This code is appropriate for the initial evaluation and treatment of a newly diagnosed injury to the left trigeminal nerve. Documentation should clearly indicate a direct injury to the nerve, such as from trauma, surgery, or a penetrating wound, and specify the left side.

• Ensure documentation specifies "left side" for the trigeminal nerve injury; otherwise, an unspecified laterality code may be more appropriate.
• Confirm this is the "initial encounter" for the injury; subsequent care would require a different encounter character (e.g., S04.32XD for subsequent encounter).
• Distinguish from trigeminal neuralgia (G50.0), which is a neuropathic pain condition, not a direct injury.