Flat foot [pes planus] (acquired), left foot

This code signifies an acquired flattening of the arch of the left foot, also known as pes planus. This condition develops over time, rather than being present from birth, and can lead to pain, altered gait, and other musculoskeletal issues.

Apply this code when documentation clearly indicates an acquired flatfoot deformity affecting the left foot. This diagnosis is typically supported by physical examination findings, patient history of symptoms, and sometimes imaging studies confirming the loss of the medial longitudinal arch.

• Differentiate between congenital (Q66.52) and acquired flatfoot; this code is specifically for acquired cases.
• Ensure laterality is accurately documented (left foot).
• Consider additional codes for associated symptoms like pain (e.g., M79.672 for pain in left foot).