Malignant neoplasm of right choroid

This code signifies a primary cancerous tumor originating in the choroid layer of the right eye. The choroid is a vascular layer between the retina and the sclera, providing nourishment to the outer layers of the retina. Malignancies here are typically melanomas.

Apply this code when documentation confirms a primary malignant neoplasm located specifically in the choroid of the patient's right eye. This diagnosis is often established through ophthalmological examination, imaging studies (e.g., ultrasound, MRI), and sometimes biopsy.

• Differentiate from secondary malignant neoplasms of the choroid, which would be coded as C79.81.
• Ensure laterality is clearly documented as "right" to avoid using unspecified or left-sided codes.
• Confirm the neoplasm is primary to the choroid; if it originated elsewhere and metastasized to the choroid, a secondary malignancy code is appropriate.