Nondisp fx of base of MC bone, subs for fx w malunion

This code signifies a fracture at the base of a metacarpal bone, excluding the thumb, that has not been displaced from its normal anatomical position. The fracture is currently in a healing phase, but the bone has healed in a misaligned or deformed manner, leading to malunion. This indicates a complication of the healing process.

Apply this code when documenting follow-up care for a patient whose non-displaced metacarpal base fracture (excluding the thumb) has healed incorrectly, resulting in malunion. This would be used during subsequent visits after the initial treatment of the fracture. It is appropriate for ongoing management of the malunion or for planning corrective procedures.

• Ensure documentation clearly states "malunion" and specifies the "base" of an "other metacarpal" (not the thumb).
• Verify this is a "subsequent encounter" for the fracture, not the initial treatment.
• Confirm the fracture was initially "nondisplaced" to align with this specific code.