Disorders of pneumogastric [10th] nerve

This code signifies a functional impairment or pathological alteration affecting the vagus nerve. Such disorders can manifest as a wide range of symptoms due to the vagus nerve's extensive innervation of the head, neck, thorax, and abdomen, impacting autonomic functions.

Use this code when documentation explicitly states a diagnosis related to vagal nerve dysfunction, such as vagal neuropathy, vagal nerve palsy, or other specific disorders affecting the 10th cranial nerve. Supporting documentation should detail the etiology (e.g., idiopathic, post-surgical, inflammatory) and the clinical presentation of the vagal nerve involvement.

• Always seek documentation specifying "vagus nerve" or "10th cranial nerve" involvement.
• Distinguish from generalized polyneuropathies or other cranial nerve disorders.
• Code any underlying cause or associated conditions separately, if documented.