XSHCPCS Level II
Separate structure, a service that is distinct because it was performed on a
- Usage notes
- Use in place of modifier 59 when two services were performed on a separate organ or structure.
- Common mistakes
- Using XS without documentation clearly identifying the distinct anatomic structure involved, which invites a denial or audit.
Related modifiers
X1Continuous/broad services: for reporting services by clinicians, who provideX2Continuous/focused services: for reporting services by clinicians whoseX3Episodic/broad services: for reporting services by clinicians who have broadX4Episodic/focused services: for reporting services by clinicians who provideX5Diagnostic services requested by another clinician: for reporting services by aXESeparate encounter, a service that is distinct because it occurred during aXPSeparate practitioner, a service that is distinct because it was performed by aXUUnusual non-overlapping service, the use of a service that is distinct because
Frequently asked questions
What does modifier XS mean?
Separate structure, a service that is distinct because it was performed on a
When do I use modifier XS?
Use in place of modifier 59 when two services were performed on a separate organ or structure.
What's a common mistake with modifier XS?
Using XS without documentation clearly identifying the distinct anatomic structure involved, which invites a denial or audit.
HCPCS modifier data from CMS. CPT® is a registered trademark of the American Medical Association — CPT modifier descriptions are not included on this site. Always verify codes with authoritative sources before making billing decisions.