Which of the following modifiers would likely indicate a service was provided by a different provider than usual?

The modifier that indicates a service was provided by a different provider than usual is Modifier 24. This modifier is specifically used to signify that a service provided is a significant and separately identifiable evaluation and management service by the same physician or other qualified health care professional during the postoperative period. However, most importantly, it also reflects a scenario where the provider performing the service is different from the one who performed the initial procedure, thus highlighting a nuanced context regarding the provider involved in the care.

In contrast, the other modifiers have distinct uses that do not pertain to indicating a different provider. For example, Modifier 59 indicates a distinct procedural service, Modifier 25 is used to denote a significant, separately identifiable E/M service performed on the same day of a procedure, and Modifier 76 signifies a repeat procedure by the same physician on the same day. These modifiers are aimed at clarifying the circumstances of a procedure rather than identifying a different provider, making Modifier 24 the most appropriate choice in this context.