Renal hypoplasia, unilateral

This code signifies a congenital condition where one kidney is underdeveloped or smaller than normal, but still present and functional to some degree. It represents a structural anomaly of the urinary system affecting only one side.

Assign this code when documentation clearly indicates a diagnosis of unilateral renal hypoplasia, typically identified through imaging studies such as ultrasound, CT, or MRI. This is often discovered during prenatal screenings or in early childhood during investigations for urinary tract infections or other renal issues.

• Ensure the documentation specifies "unilateral" to differentiate from bilateral involvement.
• Distinguish from renal agenesis (complete absence of a kidney) or renal dysplasia (abnormal development of kidney tissue).
• Code any associated conditions or complications, such as hypertension or chronic kidney disease, separately.