Disp fx of shaft of fourth MC bone, right hand, sequela

This code signifies a past injury involving a displaced break in the shaft of the fourth metacarpal bone in the right hand, where the fracture fragments were not properly aligned. It indicates that the patient is currently experiencing a residual condition or complication directly resulting from this old, displaced fracture.

This code is appropriate when documenting a long-term consequence or late effect of a previously sustained and healed, but displaced, fracture of the right fourth metacarpal shaft. Examples include chronic pain, malunion, nonunion, limited range of motion, or deformity directly attributable to the original injury. It should be used after the initial healing phase of the acute fracture.

• Always assign this code as a secondary diagnosis, following a code that describes the specific sequela (e.g., M21.041 for malunion).
• Ensure documentation clearly links the current condition to the old, displaced right fourth metacarpal shaft fracture.
• Verify laterality (right hand) and bone (fourth metacarpal) are accurately reflected in the medical record.