Anisocoria

This code describes a condition characterized by unequal pupil sizes, where one pupil is larger or smaller than the other. It indicates a disparity in the diameter of the two pupils, which can be a normal variant or a sign of an underlying neurological or ocular issue.

Assign this code when documentation clearly states the presence of anisocoria, regardless of whether it is physiological or pathological. This code is appropriate for cases where the unequal pupil size is the primary finding or a significant symptom being investigated.

• Do not use this code if the cause of the anisocoria (e.g., Horner's syndrome, Adie's pupil) is definitively diagnosed and a more specific code is available.
• Consider sequencing this code after a more definitive diagnosis if the anisocoria is a symptom of another condition.
• Ensure documentation specifies "anisocoria" rather than just "unequal pupils" to support code assignment.