Malignant neoplasm of epididymis

This code signifies the presence of a primary cancerous tumor originating in the epididymis, a coiled tube located at the back of the testicle that stores and carries sperm. This is a rare form of male genitourinary cancer.

Apply this code when documentation explicitly states a malignant neoplasm of the epididymis. This diagnosis is typically confirmed through biopsy and histopathological examination. It would be used in cases of initial diagnosis, treatment planning, and follow-up for this specific cancer.

• Ensure documentation specifies "malignant" and "epididymis" to differentiate from benign tumors or other testicular malignancies.
• Do not confuse with malignant neoplasms of the testis (e.g., seminoma, embryonal carcinoma), which are coded differently.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, unless a complication of the neoplasm is being treated.