Bones (XN) ICD-10-PCS
The XN body system covers New Technology procedures on bones, with 61 ICD-10-PCS codes across 4 root operations, 57 of them billable in fiscal year 2027. 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 · 61 codes
| Chars 1–3 | Root Operation | Codes | Billable |
|---|---|---|---|
| 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 | 11 | 10 |
| 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 | 4 | 3 |
| XNS | RepositionMoving to its normal location or other suitable location all or a portion of a body part | 43 | 42 |
| XNU | SupplementPutting in or on biological or synthetic material that physically reinforces and/oraugments the function of a portion of a body part | 3 | 2 |
The info icon shows the official root operation definition and previews the codes in that range.
About the XN Body System
These New Technology codes cover procedures involving the skull, vertebrae, pelvic bones, and bones of the arms and legs. The body-part values distinguish specific bones and, where listed, right from left.
The tables include moving all or part of a bone to a suitable position and adding material to reinforce part of a bone. They also include putting in a nonbiological appliance that supports a body function without replacing a body part and putting material in place of all or part of a bone.
Questions About This Page
How many codes are in the XN body system?
The XN body system contains 61 ICD-10-PCS codes in FY 2027, organized into 4 root operations. 57 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 2027 ICD-10-PCS order file and code tables, effective October 1, 2026 through September 30, 2027.
