Stress fracture, oth site, subs for fx w malunion

This code signifies a stress fracture occurring in an anatomical location other than the femur, tibia, fibula, or metatarsals. It specifically indicates that the patient is in the healing phase of the fracture, but the bone is not aligning correctly, leading to malunion. This condition often results from repetitive microtrauma to the bone.

Apply this code for follow-up encounters where a patient is being treated for a previously diagnosed stress fracture at an "other site" (e.g., humerus, ulna, radius, pelvis, vertebral body) and documentation confirms malunion. The physician's notes should clearly state the presence of a stress fracture and ongoing management for its healing with evidence of improper alignment.

• Ensure documentation specifies "stress fracture" and not a traumatic fracture, as different codes apply.
• Verify the anatomical site is not one of the more specific stress fracture sites (femur, tibia, fibula, metatarsal) to justify "other site."
• Confirm the encounter is "subsequent" and that malunion is explicitly documented, as this impacts the 7th character.