What does proper use of modifier 59 include?

The proper use of modifier 59 is intended to indicate that a service or procedure is distinct or independent from other services performed on the same day, which often involves situations where procedures are performed on the same area of the body but are sufficiently separate to warrant separate billing.

In the context of the choices provided, the most appropriate scenario for modifier 59 is when a separate wound repair is performed on the same day. This indicates that the separate site of the wound or the distinct nature of the repairs justifies the need for the modifier, clearly distinguishing it from other repairs or procedures that may be billed on the same day.

When considering the other options, performing a different procedure on a different day does not require modifier 59, as the distinct dates already imply separation. Similarly, a same procedure on a different site might be better suited for another modifier, as it does not fulfill the criteria of a separate service but rather is just a replication that occurs at another location. Finally, a same site procedure on a different day again wouldn't necessitate modifier 59 since the separation is inherently clear by the different day, and does not require additional clarification for payment purposes.

Thus, using modifier 59 for a separate wound repair performed on the same day is appropriate