H47.42

What This Code Means

Damage or dysfunction of the optic chiasm (the area where optic nerves cross) caused by a tumor or cancer. This can result in vision loss in specific patterns.

Coding Tips

• •This code requires documentation of a neoplasm as the underlying cause; link to the appropriate neoplasm code
• •Document whether the neoplasm is benign or malignant, as this affects treatment and prognosis