Final answer:
Cranial nerve contusion is coded when there is a documented injury to the cranial nerve. Infection, tumor, or inflammation in the cranial nerve would be coded differently.
Step-by-step explanation:
Cranial nerve contusion is coded when there is a documented injury to the cranial nerve. This means that if there is a physical injury or trauma to the cranial nerve, it would be coded as a contusion. Documented infection, tumor, or inflammation in the cranial nerve would be coded differently depending on the specific diagnosis. It's important to note that coding guidelines and practices can vary, so consulting specific coding references or a healthcare professional is recommended for accurate coding.