What is a requirement for modifier 79 to be used?

Modifier 79 is specifically designed to indicate that a surgical procedure was performed that is unrelated to a prior procedure on the same day by the same surgeon. This modifier is essential for clarifying that although the procedures occurred in close proximity in time, they are not related to the same surgical issue or condition.

Using modifier 79 helps to avoid billing complications and ensures that insurance companies understand why multiple procedures were billed together. It communicates to payers that the separate surgical service provided is distinct and should be reimbursed independently of the previous service.

The requirement that the procedure be unrelated to the first is crucial, as it maintains the integrity of how surgeries and procedures are documented and billed, distinguishing necessary repeat procedures from those stemming from the original issue.