Anatomical Regions (XW) ICD-10-PCS
The XW body system covers New Technology procedures on anatomical regions, with 412 ICD-10-PCS codes across 4 root operations, 406 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 · 412 codes
| Chars 1–3 | Root Operation | Codes | Billable |
|---|---|---|---|
| XW0 | IntroductionPutting in or on a therapeutic, diagnostic, nutritional, physiological or prophylactic substance except blood or blood products | 362 | 360 |
| XW2 | TransfusionPutting in blood or blood products | 0 | 0 |
| XW1 | TransfusionPutting in blood or blood products | 46 | 44 |
| XWH | InsertionPutting in a nonbiological appliance that monitors, assists, performs, or prevents aphysiological function but does not physically take the place of a body part | 4 | 2 |
The info icon shows the official root operation definition and previews the codes in that range.
About the XW Body System
The ICD-10-PCS root operation Anatomical Regions (code set XW) in the New Technology section involves procedures related to placing various substances or devices into the body for therapeutic, diagnostic, or supportive purposes.
This root operation includes distinct actions such as Introduction (code XW0), which refers to putting in or on substances like therapeutic or nutritional agents except blood or blood products, and Transfusion (codes XW1 and XW2), specifically denoting the infusion of blood or blood products. Another key example is Insertion (code XWH), used for placing nonbiological appliances that support or monitor physiological functions without replacing a body part physically. These codes clearly define the method and material introduced, facilitating precise documentation of technologically advanced procedures involving anatomical regions.
The ICD-10-PCS root operation Anatomical Regions (Character XW) within the New Technology section involves procedures focused on the introduction or insertion of substances or devices into specific body regions. This root operation covers different methods of introducing therapeutic or diagnostic agents, blood products, or nonbiological appliances.
Examples of Anatomical Regions procedures include the Introduction (code XW0), which places therapeutic, diagnostic, nutritional, physiological, or prophylactic substances—excluding blood or blood products—into or onto the body. The Transfusion codes (XW1 and XW2) represent the administration of blood or blood products. Additionally, Insertion (code XWH) involves placing a nonbiological appliance that supports or monitors physiological functions without replacing a body part. These codes help document advanced medical interventions aligned with new technology, emphasizing precision in recording the type and purpose of substances or devices introduced into anatomical regions.
Questions About This Page
How many codes are in the XW body system?
The XW body system contains 412 ICD-10-PCS codes in FY 2026, organized into 4 root operations. 406 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.
