ICD-10 Code C62.0 – Malignant neoplasm of undescended testis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C62.0 – Malignant neoplasm of undescended testis
What it is
C62.0 identifies a malignant tumor arising in an undescended testis, meaning the testicle has not descended into the scrotum. Use this code when the documentation clearly states cancer of an undescended testis.
Clinical signs
Clinical features vary; refer to documentation. Standard references describe a testicular mass or enlargement, sometimes with pain, heaviness, or a history of cryptorchidism, but diagnosis depends on documented malignancy and testicular location.
When to use this code
Use C62.0 when the provider documents malignant neoplasm specifically involving an undescended testis, including congenital cryptorchidism with cancer. It is appropriate for confirmed primary testicular cancer when the site is the undescended testis. Check documentation if laterality or histology is unclear.
Do not use for
Do not use this code for benign testicular disease, infertility, or cryptorchidism without malignancy. If the cancer is in a normally descended testis or another genitourinary site, choose the more specific documented diagnosis.
Coding tip
Verify that both malignancy and undescended testis are documented before assigning C62.0.