Modifier code
Modifier XS: Separate structure
Distinct procedure on a separate anatomic structure (more specific than modifier 59).
Code
XS
When to use
When two procedures occurred on anatomically distinct structures.
Common issues
- Preferred over generic modifier 59 when applicable
Frequently asked questions
What is modifier XS?
Separate structure
When should it be used?
When two procedures occurred on anatomically distinct structures.
Common issues when modifier is missing or wrong?
Preferred over generic modifier 59 when applicable.
Other modifiers
- 25 — Significant, separately identifiable E&M service on same day as procedureWhen E&M visit + procedure happen same day and the E&M was separately documented
- 26 — Professional componentSplits a procedure into its professional (physician interpretation) and technica
- 50 — Bilateral procedureProcedure performed on both sides of the body during a single session.
- 51 — Multiple proceduresMultiple procedures performed at the same session.
- 52 — Reduced servicesService partially reduced or eliminated at the physician's discretion.
- 53 — Discontinued procedureProcedure discontinued because of extenuating circumstances.
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