paramedian forehead flap and takedown insertion of paramedian forehead flap

I am new to coding, been at it only a couple of months now. Theses procedures are confusing me to say the least. The Dr. did the first surgery removing lesion(s) from the nose and then doing the paramedian forehead flap; approximately 3 wks later he did a takedown insertion of paramedian forehead flap and coded it as 11466 x2. So we get a denial as it says it is global to the first procedure. On the first procedure he used 15731-which I'm thinking he should have coded the lesion removal first, then the forehead flap. I just need some help please!!!!:eek:

paramedian forehead flap and takedown insertion of paramedian forehead flap