ICD-10 Code D41.01 – Neoplasm of uncertain behavior of right kidney (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D41.01 – Neoplasm of uncertain behavior of right kidney
What it is
D41.01 identifies a kidney mass on the right side whose behavior is uncertain, meaning it is not clearly benign or malignant. Use it when the provider documents an indeterminate neoplasm of the right kidney.
Clinical signs
Clinical features vary; refer to documentation. Imaging may show a renal mass with unclear behavior, and pathology or further workup may be needed to determine whether it is benign or malignant.
When to use this code
Use this code when the record specifically states a neoplasm of uncertain behavior in the right kidney. It fits cases where the lesion is documented as indeterminate, borderline, or not yet classified. Check documentation if the provider later confirms a benign or malignant diagnosis.
Do not use for
Do not use D41.01 for clearly benign right kidney lesions or confirmed renal cancer. If the documentation names a different kidney site or a more specific diagnosis, code that instead.
Coding tip
Code from the provider’s exact wording, and confirm laterality before assigning D41.01.