Malignant neoplasm of unspecified choroid

This code signifies a cancerous tumor originating in the choroid layer of the eye, where the specific laterality (right or left eye) has not been documented. The choroid is a vascular layer between the retina and the sclera, providing nourishment to the outer layers of the retina. This malignancy is typically a melanoma, though other primary or secondary choroidal tumors can occur.

Apply this code when the medical record clearly indicates a primary malignant neoplasm of the choroid, but the physician documentation does not specify whether it affects the right or left eye. This is appropriate for initial diagnoses where laterality is unknown or when the tumor involves both eyes without distinct laterality specified for each.

• Avoid using this code if laterality (right or left eye) is documented; instead, select the more specific code.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, followed by any associated conditions or complications.
• Ensure documentation supports the malignant nature of the choroidal neoplasm; if benign or uncertain, a different code is required.