Major contusion of unspecified kidney, sequela

This code signifies a persistent or late-effect condition resulting from a significant bruise to an unspecified kidney. It indicates that the initial injury has resolved, but the patient continues to experience symptoms or complications directly attributable to that past renal contusion.

Use this code when documenting follow-up care for a patient who previously sustained a major kidney contusion and is now presenting with residual issues such as chronic pain, hydronephrosis, or impaired renal function directly linked to the old injury. This code is appropriate when the acute phase of the injury has passed and the current encounter addresses the long-term consequences.

• Always sequence this code after the primary diagnosis describing the specific sequela (e.g., chronic kidney disease, hydronephrosis).
• Ensure documentation clearly links the current condition to a past major kidney contusion.
• This "S" seventh character indicates a sequela; do not use for initial or subsequent encounters for the acute injury.