Mech compl of int fix of unsp bone of limb, sequela

This code signifies a long-term or late-effect issue arising from a mechanical problem with an internal fixation device (e.g., plate, screw, rod) used to stabilize a bone in an arm or leg. The specific bone affected is not documented, and the complication is not a fracture, infection, or displacement.

Apply this code when a patient presents with a chronic or residual symptom directly attributable to a mechanical malfunction of an internal fixation device in a limb, and the initial acute complication has been resolved or is no longer the primary focus. Examples include chronic pain, nerve impingement, or restricted movement due to a loose or broken, but not displaced, component of the device, where the specific bone is not specified.

• Always sequence this code after the code for the primary condition or symptom being treated.
• Ensure documentation clearly states the complication is mechanical and not an infection, fracture, or simple displacement.
• If the specific bone is known, a more precise T84.1 category code should be used instead.