Disorders of hypoglossal [12th] nerve

This code represents neurological conditions affecting the hypoglossal nerve, the twelfth cranial nerve, which is primarily responsible for tongue movement. Dysfunction can manifest as weakness, atrophy, or fasciculations of the tongue, impacting speech and swallowing.

Use this code when documentation specifies a disorder or lesion directly impacting the hypoglossal nerve, such as hypoglossal nerve palsy, injury, or neuropathy. Supporting documentation should clearly indicate the involvement of the 12th cranial nerve.

• Differentiate from generalized tongue disorders or speech impediments not directly attributable to hypoglossal nerve pathology.
• Specify the underlying cause if known and documented (e.g., trauma, tumor, stroke) by coding it as a primary diagnosis, with this code as a secondary diagnosis.
• Ensure documentation clearly distinguishes unilateral versus bilateral involvement if applicable, though this code does not differentiate laterality.