Malignant neoplasm of undescended right testis

This code signifies a cancerous tumor originating in the right testis, which has failed to descend into the scrotum. This condition, also known as cryptorchidism, is a significant risk factor for testicular malignancy. The neoplasm is confirmed as malignant.

Apply this code when documentation clearly indicates a primary malignant neoplasm located in an undescended right testis. This diagnosis typically follows biopsy and pathological confirmation of malignancy in a cryptorchid testis. Supporting documentation should specify the laterality and the undescended nature of the testis.

• Ensure documentation specifies "right" testis and "undescended" to accurately assign this code.
• Do not confuse with codes for descended testicular malignancies (e.g., C62.91 for unspecified descended right testis).
• Sequence this code as the primary diagnosis when the malignancy is the reason for the encounter.