ICD-10 Code D49.511 – Neoplasm of unspecified behavior of right kidney (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D49.511 – Neoplasm of unspecified behavior of right kidney
What it is
D49.511 identifies a neoplasm in the right kidney whose behavior is not specified as benign, malignant, or uncertain. Use it when the record documents a renal mass or tumor but does not define its exact pathology.
Clinical signs
Clinical features vary; refer to documentation. Patients may have imaging findings of a right renal mass or a kidney lesion found during evaluation, but the code itself reflects the documented behavior, not symptoms.
When to use this code
Use this code when the provider documents a neoplasm of the right kidney and does not state whether it is benign or malignant. It may also apply when pathology or imaging notes a renal mass but the final behavior remains unspecified. Check documentation if the site or laterality is unclear.
Do not use for
Do not use this code for a clearly documented malignant kidney neoplasm, benign renal cyst, or non-neoplastic kidney disorder. If the chart specifies a different kidney, laterality, or behavior, code that information instead.
Coding tip
Confirm both laterality and tumor behavior in the record before assigning D49.511.