Malfunction of incontinent external stoma of urinary tract

This code signifies a functional issue with an external urinary stoma in a patient who is incontinent. It indicates that the stoma, which is surgically created to divert urine, is not performing its intended function correctly, leading to problems with urine containment or flow. This malfunction can manifest as leakage, obstruction, or other issues impacting the stoma's ability to manage urine effectively.

This code is appropriate when documentation specifies a problem with an external urinary stoma in an incontinent patient, such as a urostomy or ileal conduit, that is not functioning as expected. Clinical notes should clearly describe the nature of the malfunction, for example, "urostomy leaking excessively" or "patient experiencing difficulty with urine drainage from ileal conduit due to stoma malfunction."

• Ensure documentation specifies "incontinent" in relation to the stoma malfunction; otherwise, consider N99.520 (Malfunction of incontinent internal stoma of urinary tract) or N99.521 (Malfunction of continent external stoma of urinary tract).
• Always code the underlying cause of the stoma malfunction if known and documented, such as infection or stricture, in addition to this code.
• Distinguish between a true malfunction and routine stoma care or minor irritation; the documentation should indicate a functional problem.