Anatomical Regions (2W) ICD-10-PCS
The 2W body system covers Placement procedures on anatomical regions, with 850 ICD-10-PCS codes across 7 root operations, 843 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 7 operations · 850 codes
| Chars 1–3 | Root Operation | Codes | Billable |
|---|---|---|---|
| 2W0 | ChangeTaking out or off a device from a body part and putting back an identical or similar device in or on the same body part without cutting or puncturing the skin or a mucous membrane | 272 | 271 |
| 2W1 | CompressionPutting pressure on a body region | 61 | 60 |
| 2W2 | DressingPutting material on a body region for protection | 31 | 30 |
| 2W3 | ImmobilizationLimiting or preventing motion of a body region | 122 | 121 |
| 2W4 | PackingPutting material in a body region or orifice | 31 | 30 |
| 2W5 | RemovalTaking out or off a device from a body part | 272 | 271 |
| 2W6 | TractionExerting a pulling force on a body region in a distal direction | 61 | 60 |
The info icon shows the official root operation definition and previews the codes in that range.
About the 2W Body System
These placement codes describe procedures on body regions such as the head, chest wall, back, hands and feet. For many limb regions, the body region value distinguishes right from left.
The tables cover applying pressure, placing protective dressings, packing a region or opening, limiting movement, and applying a pulling force. They also cover taking a device off or replacing it with a similar device on the same body part without cutting or puncturing the skin or a mucous membrane. Splinting is one way to limit movement.
Questions About This Page
How many codes are in the 2W body system?
The 2W body system contains 850 ICD-10-PCS codes in FY 2027, organized into 7 root operations. 843 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.
