Breakdown (mechanical) of int fix of unsp bone of limb, init

This diagnosis code signifies a mechanical failure of an internal fixation device, such as a plate, screw, or rod, used to stabilize a fracture or osteotomy in a limb. The breakdown is due to a structural issue with the device itself, rather than an infection or patient-related complication. The specific bone affected is not documented.

Apply this code when a patient presents with symptoms directly attributable to the mechanical failure of an internal fixation device in an extremity, and the specific bone involved is not specified in the medical record. This is for the initial encounter for the complication. Examples include a broken screw head, a bent plate, or a loosened rod identified on imaging.

• Ensure documentation clearly states "mechanical breakdown" or similar terminology for the device failure.
• Confirm the encounter is the initial treatment for this specific complication. Subsequent encounters will use different seventh characters.
• If the specific bone of the limb is identified (e.g., femur, tibia), a more specific code within the T84.11 series should be used.