The appropriate use of modifiers XE, XP, XS, XU, or 59 is to report a service that was distinct from another service on the same day, and only when the medical record proves it. Use the X modifier that names the reason (separate encounter, practitioner, structure, or unusual service) and fall back on 59 only […]
Appropriate Use of Modifiers XE, XP, XS, XU, or 59









