Unspecified acquired deformity of left lower leg

This code signifies an acquired structural abnormality or malformation of the left lower leg that is not congenital and whose specific nature is not documented. It indicates a deviation from the normal anatomical form of the tibia, fibula, or associated soft tissues, developed after birth.

Use this code when documentation clearly states an acquired deformity of the left lower leg but lacks specific details regarding the type (e.g., valgus, varus, rotational). This code is appropriate when the provider has not specified the exact nature of the deformity, or when further diagnostic workup is pending.

• Avoid using this code if a more specific acquired deformity of the left lower leg (e.g., M21.062, M21.162) is documented.
• Query the provider for more specific details if possible to allow for more precise coding.
• This code should be sequenced as a primary or secondary diagnosis depending on the reason for the encounter.