Nondisp commnt fx shaft of ulna, unsp arm, 7thM

This code describes a fracture of the ulna's shaft that has broken into multiple pieces (comminuted) but where the bone fragments remain in their normal anatomical position (nondisplaced). It specifically applies to an open fracture (where the skin was broken) that is now being treated for a nonunion, meaning the bone has failed to heal properly. The "unspecified arm" indicates the laterality is not documented.

Use this code when a patient presents for follow-up care of a previously sustained open comminuted ulna shaft fracture (Type I or II) that has not healed as expected. This would include situations where surgical intervention or other treatments are being performed to address the nonunion. It is appropriate when the medical record does not specify whether the fracture is on the left or right arm.

• Ensure documentation clearly states "nondisplaced," "comminuted," and "shaft of ulna."
• Verify the encounter is for a nonunion of an open fracture, not a routine follow-up for a healing fracture.
• Only use this code when laterality (left/right arm) is truly unspecified in the medical record. If laterality is known, a more specific code should be used.