Lobulated, fused and horseshoe kidney

This code describes congenital renal anomalies characterized by abnormal kidney shape and/or fusion. A lobulated kidney retains fetal lobulations, a fused kidney involves the joining of two kidneys (e.g., horseshoe kidney), and a horseshoe kidney specifically refers to the fusion of the lower poles. These conditions are typically present at birth and can affect renal function or predispose to other urinary tract issues.

Use this code when documentation explicitly states the presence of a lobulated, fused, or horseshoe kidney as a congenital anomaly. This is often identified during prenatal imaging, neonatal examination, or subsequent investigations for urinary tract infections, hydronephrosis, or other renal complications. Supporting documentation would include imaging reports (ultrasound, CT, MRI) or physician notes detailing the specific renal morphology.

• Do not use this code for acquired kidney shape abnormalities; it is strictly for congenital conditions.
• Ensure the documentation specifies the type of anomaly (lobulated, fused, or horseshoe) to accurately assign this code.
• Consider co-reporting with codes for associated conditions such as hydronephrosis (N13.x) or urinary tract infections (N39.0) if present and documented.