Specific Modifier for Distinct Procedural Services

Effective January 1, 2015, CMS is adding four new HCPCS modifiers to selectively identify subsets of modifier 59 for Distinct Procedural Services as follows:

XE Separate Encounter: a service that is distinct because it occurred during a separate encounter

XP Separate Practitioner: a service that is distinct because it was performed by a different practitioner

XS Separate Structure: a service that is distinct because it was performed on a separate organ/structure

XU Unusual Non-Overlapping Service: the use of a service that is distinct because it does not overlap usual components of the main service

These modifiers,  collectively referred to as -X{EPSU} modifiers , will be implemented by Medicaid Iowa for dates of service on or after January 1, 2015. 

Source: https://dhs.iowa.gov/sites/default/files/1438 Specific Modifier for Distinct Procedural Services.pdf