Injury of olfactory nerve, unspecified side, init encntr

This code signifies damage to the first cranial nerve, responsible for the sense of smell, when the specific side of the injury is not documented. It indicates an initial presentation or active treatment phase for such an injury. This can manifest as anosmia (complete loss of smell) or hyposmia (reduced sense of smell).

Apply this code when a patient presents with a new injury to the olfactory nerve, and the medical record does not specify whether the injury is to the left or right side. Documentation should clearly state an olfactory nerve injury and the encounter type as initial. This code is appropriate for conditions like post-traumatic anosmia where the laterality is not determined.

• Ensure documentation explicitly states "unspecified side" or lacks laterality for the olfactory nerve injury.
• Distinguish between initial, subsequent, and sequela encounters; this code is only for initial encounters.
• Do not use if the injury is to other cranial nerves; specific codes exist for those.