CPT® Code for Excision

If a doctor gives you a defect of 5 x 15 cm advancement flap wound closure for forearm, how would we determine the correct CPT® codes?The description is as follows from the pathology report.......

Labeled melanoma, forearm measuring 10.9cm x 4.6cm x 0.5cm in depth. The skin surface displays a healed scar measuring approx 0.6 x 0.6cm to within 1.5cm to the closest margin.

Thank you.