XNU Supplement - Bones ICD-10-PCS
The XNU code range contains 3 ICD-10-PCS codes for Supplement procedures on the bones. 2 of the codes are billable and valid for inpatient claim submission in fiscal year 2026.
Root Operation Definition
Supplement: Putting in or on biological or synthetic material that physically reinforces and/oraugments the function of a portion of a body part.
Codes in the XNU Range 3 codes · 2 billable
- XNU New Technology, Bones, SupplementNon-billable header
- XNU0356 Supplement Lumbar Vertebra with Mechanically Expandable (Paired) Synthetic Substitute, Percutaneous Approach, New Technology Group 6
- XNU4356 Supplement Thoracic Vertebra with Mechanically Expandable (Paired) Synthetic Substitute, Percutaneous Approach, New Technology Group 6
About the XNU Code Range
The ICD-10-PCS root operation Supplement (code prefix XNU) in the New Technology section involves the insertion of material to support or enhance the function of a body part, specifically within the Bones category. This procedure is used to reinforce or replace structural components without removing any original tissue.
For example, the codes demonstrate supplementing the Lumbar Vertebra or Thoracic Vertebra using a mechanically expandable paired synthetic substitute via a Percutaneous Approach (codes XNU0356 and XNU4356). These new technology codes reflect advanced methods for bone supplementation designed to improve stability and function while minimizing invasiveness. Correct use of these ICD-10-PCS codes is essential for accurately documenting innovative procedures that support spinal structures.
Questions About This Page
How many billable codes are in the XNU range?
Of the 3 codes in this range, 2 are billable and valid for inpatient claim submission from October 1, 2025 through September 30, 2026. Table header codes group them but cannot be reported on claims.
What does the XNU range classify?
The range classifies Supplement procedures, putting in or on biological or synthetic material that physically reinforces and/oraugments the function of a portion of a body part, performed on the bones. Each code adds the body part, approach, device, and qualifier in characters four through seven, and links to its own reference page.
Related References
Source: CMS FY 2026 ICD-10-PCS order file and code tables, effective October 1, 2025 through September 30, 2026.
