Nondisp oblique fx shaft of unsp ulna, 7thN

This code describes a situation where a patient has a non-displaced oblique fracture in the shaft of an unstated ulna bone, and they are returning for care. The fracture was initially an open fracture of a severe type (IIIA, IIIB, or IIIC), and it has failed to heal properly, resulting in a nonunion.

Apply this code when documenting follow-up care for a patient with a previously diagnosed severe open oblique ulnar shaft fracture that has not united. This includes situations where the patient is undergoing treatment for the nonunion, such as bone grafting or revision surgery. It is appropriate for any subsequent encounter after the initial treatment of the acute fracture.

• Ensure documentation clearly specifies "subsequent encounter" and "nonunion."
• Verify the original open fracture type was IIIA, IIIB, or IIIC.
• Do not use for initial treatment of the fracture or for routine follow-up of a healing fracture.