Mech loosening of internal left knee prosth joint, sequela

This diagnosis indicates a late effect of a left knee replacement where the prosthetic components have become mechanically unstable or detached from the bone. This loosening is not an acute event but rather a long-term complication of the initial surgery, leading to pain, instability, and functional impairment.

Apply this code when documentation specifies mechanical loosening of a previously implanted left knee prosthesis, and the encounter is for the sequela or long-term management of this condition. This includes scenarios where a patient presents for evaluation, treatment, or revision surgery due to chronic loosening.

• Ensure documentation explicitly states "mechanical loosening" and specifies the "left knee" and "prosthetic joint."
• The "S" seventh character indicates a sequela, meaning the patient is receiving care for the late effects of the initial complication.
• Do not use for acute or initial complications of the prosthesis; those would typically fall under the "A" or "D" seventh character.