Congenital deformity of knee

This code signifies a structural abnormality of the knee joint that is present at birth. These deformities can range from subtle variations in joint alignment to significant malformations affecting the bones, ligaments, or menisci. The condition is not acquired after birth but is a result of developmental issues during gestation.

Apply this code when documentation clearly indicates a congenital (present at birth) malformation or abnormal development of the knee. This includes conditions such as congenital genu varum (bowlegs), genu valgum (knock-knees), patellar maltracking, or other structural anomalies identified at or shortly after birth. Supporting documentation should specify the congenital nature of the knee deformity.

• Ensure the documentation explicitly states "congenital" to differentiate from acquired knee deformities.
• Do not use this code for developmental conditions that manifest later in childhood without a clear congenital origin.
• Code any associated congenital conditions or syndromes affecting the knee separately, if applicable.