Stress fracture, right toe(s), subs for fx w nonunion

This code signifies a stress fracture in one or more toes of the right foot that has failed to heal properly after initial treatment. It indicates a persistent break in the bone due to repetitive stress, where the bone ends have not united.

Apply this code when documentation specifies a right toe stress fracture that is being treated for nonunion, meaning the fracture has not healed as expected. This typically occurs during follow-up visits after initial treatment for the stress fracture, where imaging confirms the lack of bone healing.

• Ensure documentation explicitly states "nonunion" of the stress fracture.
• Verify laterality (right toe) is clearly documented.
• Distinguish from malunion, which implies healing in an incorrect position, not a lack of healing.