Ankle-foot orthoses described by codes L1900, L1910-L1990 extend well above the ankle (usually to near the top of the calf) and are fastened around the lower leg above the ankle. The terminal height of an AFO shall be located between the proximal border of the gastrocnemius and the apex of the head of the fibula (a region that is generally 2-4 cm distal to the apex of the head of the fibula). These features distinguish them from foot orthotics which are shoe inserts that do not extend above the ankle and ankle gauntlets described by codes L1902 – L1907. To read the entire policy and guidelines, please click here