Disp fx of med malleolus of l tibia, 7thN

This code describes a situation where the inner ankle bone (medial malleolus) of the left leg has a break that is not aligned properly. This specific fracture is an open fracture, meaning the skin was broken, and it is a severe type (IIIA, IIIB, or IIIC) that has failed to heal after an initial treatment.

This code is used for follow-up encounters when a patient is being treated for a previously diagnosed displaced open fracture of the left medial malleolus that has progressed to nonunion. This applies when the open fracture was initially classified as type IIIA, IIIB, or IIIC. It indicates ongoing management of the unhealed fracture.

• Ensure documentation clearly specifies "nonunion" and the open fracture type (IIIA, IIIB, or IIIC).
• Verify the laterality is "left" and the specific bone is the "medial malleolus."
• This code is for subsequent encounters, not the initial treatment of the fracture.