Injury to optic chiasm

This code signifies traumatic damage to the optic chiasm, the crucial intersection of the optic nerves where visual information from both eyes partially crosses over. Such an injury can lead to various visual field defects, often affecting both eyes.

Use this code when documentation clearly indicates a direct injury to the optic chiasm resulting from trauma, such as a head injury, fracture involving the sella turcica, or penetrating injury. Supporting documentation should specify the mechanism of injury and the anatomical site of damage.

• Differentiate from optic nerve injuries (e.g., 950.2) or optic tract injuries (e.g., 950.3), as the chiasm has a distinct anatomical location and clinical presentation.
• Always code the underlying cause of the injury (e.g., fracture, open wound) first, followed by this code as a secondary diagnosis.
• Ensure the documentation specifies "chiasm" to avoid confusion with other parts of the visual pathway.