Bones (XN) ICD-10-PCS
The XN body system covers New Technology procedures on bones, with 86 ICD-10-PCS codes across 4 root operations, 78 of them billable in fiscal year 2026. Each root operation defines a distinct procedural objective, and the info icons show the official definition with a preview of the codes inside.
Root Operations in This Body System 4 operations · 86 codes
| Chars 1–3 | Root Operation | Codes | Billable |
|---|---|---|---|
| XNS | RepositionMoving to its normal location or other suitable location all or a portion of a body part | 54 | 52 |
| XNU | SupplementPutting in or on biological or synthetic material that physically reinforces and/oraugments the function of a portion of a body part | 6 | 4 |
| XNH | InsertionPutting in a nonbiological appliance that monitors, assists, performs, or prevents aphysiological function but does not physically take the place of a body part | 18 | 16 |
| XNR | ReplacementPutting in or on biological or synthetic material that physically takes the placeand/or function of all or a portion of a body part | 8 | 6 |
The info icon shows the official root operation definition and previews the codes in that range.
About the XN Body System
The ICD-10-PCS root operation Bones (XN) within the New Technology section covers procedures involving the application of devices or materials related to bone function and structure. This root operation addresses both the insertion and modification of elements that support or replace bone functions.
Specific examples of this root operation include Insertion (XNH), which involves placing a nonbiological appliance that monitors or assists physiological functions without replacing the bone itself. Another example is Replacement (XNR), where biological or synthetic materials physically take the place of all or part of a bone. Additionally, Reposition (XNS) entails moving a bone or a portion of it back to its normal or a suitable location. Lastly, Supplement (XNU) involves reinforcing or augmenting bone function with biological or synthetic materials. These codes provide detailed options for coding advanced bone-related procedures performed using new technologies.
Questions About This Page
How many codes are in the XN body system?
The XN body system contains 86 ICD-10-PCS codes in FY 2026, organized into 4 root operations. 78 of them are billable on inpatient claims.
What is a root operation?
The root operation is the third character of every ICD-10-PCS code and names the objective of the procedure. Drainage takes fluid out, Excision cuts out a portion of a body part, and Resection removes all of one. Picking the right root operation is the central skill of PCS coding, so each one above carries its official CMS definition.
Related References
Source: CMS FY 2026 ICD-10-PCS order file and code tables, effective October 1, 2025 through September 30, 2026.
