Anatomical Regions (2W) ICD-10-PCS
The 2W body system covers Placement procedures on anatomical regions, with 1,700 ICD-10-PCS codes across 7 root operations, 1,686 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 7 operations · 1,700 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 | 544 | 542 |
| 2W1 | CompressionPutting pressure on a body region | 122 | 120 |
| 2W2 | DressingPutting material on a body region for protection | 62 | 60 |
| 2W3 | ImmobilizationLimiting or preventing motion of a body region | 244 | 242 |
| 2W4 | PackingPutting material in a body region or orifice | 62 | 60 |
| 2W5 | RemovalTaking out or off a device from a body part | 544 | 542 |
| 2W6 | TractionExerting a pulling force on a body region in a distal direction | 122 | 120 |
The info icon shows the official root operation definition and previews the codes in that range.
About the 2W Body System
The ICD-10-PCS root operation Placement in the 2W Anatomical Regions category involves positioning or applying something to a body region. This operation covers various procedures where materials or devices are placed or removed without necessarily breaching skin or mucous membranes.
Specific examples within this classification illustrate the range of actions coded under Placement. These include Change (code 2W0), which means removing and replacing a device on the same body part without cutting or puncturing, and Compression (2W1), applying pressure to a body area. Other codes cover Dressing (2W2)—applying protective material; Immobilization (2W3)—restricting movement; Packing (2W4)—inserting material into a body region or orifice; Removal (2W5)—taking off a device; and Traction (2W6)—applying a pulling force in a distal direction. These ICD-10-PCS codes allow precise documentation of placement-related procedures without invasive entry, essential for accurate coding and clinical communication.
Questions About This Page
How many codes are in the 2W body system?
The 2W body system contains 1,700 ICD-10-PCS codes in FY 2026, organized into 7 root operations. 1,686 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.
