Chalcosis, bilateral

This code describes a bilateral copper deposition within the eye, often affecting the cornea, lens, or vitreous. This condition results from chronic systemic copper overload, typically seen in Wilson's disease or prolonged exposure to copper.

Apply this code when documentation explicitly states "chalcosis" affecting both eyes. Supporting documentation should include ophthalmological findings confirming copper deposits, such as Kayser-Fleischer rings in the cornea or sunflower cataracts in the lens, in both eyes.

• Ensure documentation specifies "bilateral" involvement; otherwise, a unilateral code or unspecified code may be more appropriate.
• Always code the underlying systemic condition causing the copper overload (e.g., Wilson's disease, E83.01) as the primary diagnosis, with chalcosis as a secondary diagnosis.
• Distinguish from siderosis (iron deposition), which has different ICD-10-CM codes.