An activity that takes place during the early phases of pathogenesis and includes activities that limit the progression of disease

A70 year-old female has a drooping left eyelid obstructing her vision and has consented to having the blepharoptosis repaired. a skin marking pencil was used to outline the external proposed skin incision on the left upper eyelid. the lower edge of the incision was placed in the prominent eyelid crease. the skin was excised to the levator aponeurosis. an attenuated area of levator aponeurosis was dehisced from the lower strip. three 6-0 silk sutures were then placed in mattress fashion, attaching this attenuated tissue superiorly to the intact tissue inferiorly. this provided moderate elevation of the eyelid. what cptâ® code is reported?