Coding Multiple Z-Plasties

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Question:  

When billing for multiple Z-plasties, is the billing done by the number of Z-plasties or the total sq cm having added together each of the Z-plasty areas in sq cm?

Answer:

The coding for a Z-plasty (140xx codes) is done based on the total sq cm of the primary and secondary defect size and not necessarily the number of z-plasties done. So you will report one code for each defect. If there are two separate defects closed with two separate advancement flaps report one 140xx code for each defect – or two codes.