Malignant neoplasm of left ciliary body

This diagnosis code identifies a primary cancerous tumor originating in the ciliary body of the patient's left eye. The ciliary body is a structure within the eye that produces aqueous humor and contains the ciliary muscle, which is involved in accommodation.

Apply this code when documentation clearly indicates a confirmed malignant neoplasm located specifically in the left ciliary body. This is typically supported by pathology reports, imaging studies, and ophthalmological examination findings confirming the tumor's primary site and malignancy.

• Ensure laterality is precisely documented (left vs. right vs. unspecified).
• Distinguish primary malignancy from metastatic disease to the ciliary body.
• Verify the specific ocular structure; do not confuse with iris or choroid malignancies.