Scotoma of blind spot area, left eye

This code signifies a scotoma, or an area of partial or complete vision loss, specifically located within the physiological blind spot of the left eye. This blind spot corresponds to the optic disc where the optic nerve exits the retina, and it is normally devoid of photoreceptors. A scotoma in this area indicates an abnormal visual field defect.

Assign this code when documentation clearly indicates a scotoma affecting the blind spot region of the left eye, as identified through visual field testing (e.g., automated perimetry, Amsler grid). This diagnosis is typically made by an ophthalmologist or optometrist based on objective findings.

• Ensure laterality is accurately documented; this code is specific to the left eye.
• Distinguish from other types of scotomas (e.g., central, paracentral) which have different codes.
• Look for documentation of visual field testing results confirming the blind spot scotoma.