Pupillary abnormality, left eye

This code signifies an abnormal pupil in the left eye, which can manifest as an irregular shape, size, or reactivity to light. This includes conditions such as anisocoria (unequal pupil size), dyscoria (abnormal pupil shape), or sluggish/absent pupillary light reflex, specifically affecting the left eye. It indicates a deviation from normal pupillary function or morphology.

Use this code when documentation specifies a pupillary abnormality confined to the left eye, such as a fixed and dilated pupil, a miotic pupil, or an irregularly shaped pupil. This code is appropriate when the underlying cause of the abnormality is either unknown or is coded separately. Supporting documentation would include ophthalmological exam findings, neurological assessments, or physician notes detailing the specific left eye pupillary deviation.

• Ensure documentation clearly specifies the left eye. If bilateral, a different code is required.
• Do not use this code if a more specific diagnosis for the pupillary abnormality (e.g., Adie's pupil, Horner's syndrome) is known and documented; code the specific condition instead.
• Consider sequencing this code after any underlying systemic or neurological conditions contributing to the pupillary abnormality, if applicable.