In simple words: This is a birth defect where one or both legs haven't fully developed.

A congenital condition characterized by the incomplete or underdeveloped formation of one or both lower limbs. This occurs during the early weeks of pregnancy and can manifest as missing limb segments, shortened bones, or other structural abnormalities. Various factors, including genetic mutations or exposure to certain medications or substances during pregnancy, can contribute to this condition.

Example 1: A newborn is examined and found to have a shortened left leg with missing toes. After further investigation, including genetic testing and imaging studies, a diagnosis of unspecified reduction defect of the lower limb (Q72.9) is made., A fetus is diagnosed prenatally with a significant lower limb abnormality through ultrasound imaging. Following birth, the infant is found to have a complete absence of the right leg below the knee, falling under the category of an unspecified reduction defect (Q72.9)., An individual with a congenital absence of the left foot presents for consultation regarding prosthetic options. The underlying diagnosis is coded as Q72.9, reflecting the unspecified nature of the limb reduction defect.

Thorough documentation is essential for accurate coding. This should include detailed clinical findings from physical examinations, imaging results (such as X-rays, ultrasounds, or MRI scans), genetic testing reports, and operative reports if surgical interventions are performed. Additionally, any documentation of functional limitations, assistive device use, or therapeutic interventions should be included.

** Not to be used on the maternal record. Excludes inborn errors of metabolism (E70-E88).