Malignant neoplasm of other cranial nerves

This code signifies the presence of a malignant tumor affecting any cranial nerve other than the optic (II), oculomotor (III), trochlear (IV), trigeminal (V), abducens (VI), facial (VII), vestibulocochlear (VIII), glossopharyngeal (IX), vagus (X), accessory (XI), or hypoglossal (XII) nerves when a more specific site is not identified. It indicates a primary cancerous growth originating within or directly involving these less commonly specified cranial nerves.

Use this code when documentation clearly states a primary malignant neoplasm of a cranial nerve, and the specific nerve involved is not one of the more commonly coded individual cranial nerves (e.g., a malignant schwannoma of a cranial nerve not otherwise specified). Supporting documentation would include pathology reports confirming malignancy and imaging studies or operative notes detailing the tumor's location and involvement of an unspecified cranial nerve.

• Ensure the documentation specifies "malignant" and "primary" for this code; secondary malignancies would use a different code.
• Always attempt to code to the highest level of specificity; if a specific cranial nerve (e.g., trigeminal, facial) is documented, use the corresponding more specific C72.x code.
• Consider sequencing this code as the primary diagnosis when the cranial nerve malignancy is the reason for the encounter or treatment.