Injury of optic chiasm, sequela

This code describes a long-term effect or complication resulting from a previous injury to the optic chiasm. The optic chiasm is the part of the brain where optic nerves from both eyes cross, and damage here can lead to various visual field defects. "Sequela" indicates that the acute injury has resolved, but its lasting effects persist.

Use this code when documenting a patient presenting with chronic visual disturbances, such as bitemporal hemianopsia, directly attributable to a past injury of the optic chiasm. Documentation should clearly state the prior injury and link the current visual deficit as a residual effect. This code is appropriate for follow-up visits addressing these long-term complications.

• Always sequence the sequela code first, followed by codes for the specific visual deficit (e.g., H53.4x for visual field defects).
• Ensure the medical record explicitly states "sequela," "late effect," or similar terminology linking the current condition to a past injury.
• Do not use this code for acute optic chiasm injuries; refer to the acute injury codes in the S04.02 category without the "S" seventh character.