Our clinic is using the skin substitute Apligraf which is code Q4101. It comes in one size of 44 cm. It is not reuseable and my question is do I have to identify the amount wasted? 25 cm was used and I don't understand the difference between coding Q4101-KX X 44 and Q4101-KX X 25 AND Q4101-JW X 19. The code Q4101 is per cm.