Renal hypoplasia, unspecified

This code represents a congenital condition where one or both kidneys are underdeveloped or abnormally small, but still contain all the normal renal components. It signifies a kidney that has not reached its normal size due to incomplete development, leading to reduced nephron count and potentially impaired renal function.

Use this code when documentation indicates a diagnosis of renal hypoplasia without further specification of the type (e.g., simple, oligomeganephronia). It is appropriate for cases where imaging studies (ultrasound, CT, MRI) confirm abnormally small kidneys and the physician explicitly diagnoses hypoplasia.

• Do not use this code if the documentation specifies renal dysplasia, which involves abnormal kidney tissue organization.
• Always look for laterality (left, right, bilateral) if specified, as more specific codes exist.
• Code any associated chronic kidney disease (CKD) or other complications separately.