ICD-10 Code C61 – Malignant neoplasm of prostate (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C61 – Malignant neoplasm of prostate
What it is
C61 identifies a malignant tumor arising in the prostate gland. Use it when documentation clearly states prostate cancer or malignant neoplasm of the prostate.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include an abnormal prostate exam, elevated prostate-specific antigen, urinary symptoms, or biopsy-confirmed adenocarcinoma.
When to use this code
Use C61 when the provider documents primary prostate cancer, including newly diagnosed or active disease. It also applies when the chart states malignant neoplasm of the prostate without further detail. If the record is unclear about primary site or histology, check documentation.
Do not use for
Do not use C61 for benign prostatic hyperplasia, prostatitis, or elevated PSA alone. If the cancer is documented as secondary or metastatic from another primary site, code the documented primary and metastatic sites instead.
Coding tip
Code only when malignancy is explicitly documented, and verify whether the prostate cancer is primary, recurrent, or metastatic.