Injury of olfactory nerve, right side, initial encounter

This diagnosis code signifies damage to the right olfactory nerve, which is the first cranial nerve responsible for the sense of smell. This injury can result in anosmia (complete loss of smell) or hyposmia (reduced sense of smell) on the affected side.

Use this code for a patient presenting with a new injury to the right olfactory nerve, such as following head trauma, neurosurgery, or exposure to toxic substances. Documentation should clearly indicate the right side of involvement and that this is the initial treatment encounter for the injury.

• Ensure documentation specifies "right side" and "initial encounter" to support this specific code.
• Differentiate from other cranial nerve injuries; this code is exclusively for the olfactory nerve.
• Consider an external cause code (e.g., from the V, W, X, or Y categories) to describe the circumstances of the injury.