Neoplasm of unspecified behavior of other GU organ

This code signifies a tumor within the genitourinary system whose biological behavior (benign, malignant, or uncertain) has not been definitively determined. It applies to neoplasms affecting organs such as the urethra, prostate (excluding specified sites), seminal vesicles, or other less common genitourinary structures, where the pathology report is inconclusive regarding its nature.

Use this code when documentation clearly indicates a neoplasm of a genitourinary organ other than the bladder, kidney, or male/female genital organs with a specified behavior, and the pathology report or clinical assessment is pending or inconclusive regarding malignancy. This is appropriate for initial encounters where further workup is planned to determine the tumor's definitive classification.

• Avoid using this code if a more specific behavior (benign, malignant, uncertain) or site within the genitourinary system is documented.
• Always review the pathology report carefully; if it specifies benign or malignant, use the appropriate C or D code.
• Do not use for neoplasms of the bladder (D49.4), kidney (D49.4), or female/male genital organs with a more specific D49.x code.