An AFO (abbreviation for Ankle-Foot Orthotics) supports, prevents, corrects, or aligns ankle deformities or improves its function. Below you can find the HCPCS codes used to bill AFO. 1. What Is HCPCS Code L1900? L1900 covers the supply of an AFO (ankle foot orthosis). This is used to assist the patient with the dorsiflexion movement….