ICD-10 Code C63.01 – Malignant neoplasm of right epididymis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C63.01 – Malignant neoplasm of right epididymis
What it is
This code identifies a malignant tumor arising in the right epididymis, the coiled tube behind the testis that stores and carries sperm. Use it when documentation clearly states a primary cancer of the right epididymis.
Clinical signs
Clinical features may include a scrotal mass, swelling, pain, or a palpable abnormality, but presentation can vary. Confirm the diagnosis in the record; pathology, imaging, or specialist assessment may support it.
When to use this code
Use C63.01 when the provider documents malignant neoplasm of the right epididymis, including confirmed primary cancer at that site. It is appropriate for encounter coding when the condition is being evaluated, treated, or monitored. If laterality is not specified, check documentation.
Do not use for
Do not use this code for benign epididymal masses, infections, cysts, or trauma. If the chart does not clearly identify malignancy in the right epididymis, check documentation.
Coding tip
Verify laterality and anatomic site carefully, because epididymal tumors are uncommon and documentation may be limited.