Drusen of optic disc, left eye

This code signifies the presence of drusen, which are small, yellowish deposits of protein and lipid material, located within the optic nerve head of the left eye. These deposits can be superficial or buried within the optic disc tissue.

This code is used when documentation explicitly states the presence of optic disc drusen affecting the left eye. It is typically identified during an ophthalmoscopic examination or imaging studies such as B-scan ultrasonography or optical coherence tomography (OCT).

• Ensure laterality is clearly documented as left eye (OS) to support this specific code.
• Distinguish from other optic nerve disorders or retinal drusen, which have different codes.
• If both eyes are affected, use the appropriate bilateral code or separate codes for each eye.