Disp fx of posterior wall of unspecified acetabulum, sequela

This code signifies a long-term complication or late effect resulting from a previously sustained fracture of the posterior wall of the acetabulum, where the bone fragments remain out of their normal alignment. It indicates that the initial injury has healed, but residual issues directly attributable to the displaced fracture persist. These sequelae can include chronic pain, functional limitations, or degenerative changes in the hip joint.

Apply this code when documenting a patient presenting for treatment of a condition that is a direct consequence of a past, displaced posterior acetabular wall fracture. This includes scenarios such as chronic hip pain, post-traumatic arthritis, or persistent instability arising from the original injury. This code is appropriate when the acute phase of the fracture has passed, and the current encounter addresses the lasting impact.

• Always sequence this sequela code after the code for the specific residual condition being treated (e.g., M16.4 for post-traumatic osteoarthritis).
• Ensure documentation clearly links the current condition to the historical displaced posterior acetabular wall fracture.
• Do not use this code for initial or subsequent encounters during the active treatment phase of the acute fracture.