Anatomical Regions, General (0W) ICD-10-PCS
The 0W body system covers Medical and Surgical procedures on anatomical regions, general, with 4,536 ICD-10-PCS codes across 18 root operations, 4,500 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 18 operations · 4,536 codes
| Chars 1–3 | Root Operation | Codes | Billable |
|---|---|---|---|
| 0W0 | AlterationModifying the anatomic structure of a body part without affecting the function of the body part | 266 | 264 |
| 0W1 | BypassAltering the route of passage of the contents of a tubular body part | 184 | 182 |
| 0W2 | 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 | 78 | 76 |
| 0W3 | ControlStopping, or attempting to stop, postprocedural bleeding | 158 | 156 |
| 0W4 | CreationMaking a new genital structure that does not take over the function of a body part | 14 | 12 |
| 0W8 | DivisionCutting into a body part without draining fluids and/or gases from the body part in order to separate or transect a body part | 4 | 2 |
| 0W9 | DrainageTaking or letting out fluids and/or gases from a body part | 386 | 384 |
| 0WB | ExcisionCutting out or off, without replacement, a portion of a body part | 222 | 220 |
| 0WC | ExtirpationTaking or cutting out solid matter from a body part | 122 | 120 |
| 0WF | FragmentationBreaking solid matter in a body part into pieces | 102 | 100 |
| 0WH | InsertionPutting in a non-biological appliance that monitors, assists, performs or prevents a physiological function but does not physically take the place of a body part | 458 | 456 |
| 0WJ | InspectionVisually and/or manually exploring a body part | 176 | 174 |
| 0WM | ReattachmentPutting back in or on all or a portion of a separated body part to its normal location or other suitable location | 22 | 20 |
| 0WP | RemovalTaking out or off a device from a body part | 1,030 | 1,028 |
| 0WQ | RepairRestoring, to the extent possible, a body part to its normal anatomic structure and function | 108 | 106 |
| 0WU | SupplementPutting in or on biological or synthetic material that physically reinforces and/or augments the function of a body part | 146 | 144 |
| 0WW | RevisionCorrecting, to the extent possible, a portion of a malfunctioning device or the position of a displaced device | 1,054 | 1,052 |
| 0WY | TransplantationPutting in or on all or a portion of a living body part taken from another individual or animal to physically take the place and/or function of all or a portion of a similar body part | 6 | 4 |
The info icon shows the official root operation definition and previews the codes in that range.
About the 0W Body System
Within the ICD-10-PCS Medical and Surgical section, the root operations under the General Anatomical Regions classification (0W) encompass a variety of procedures involving manipulation of body parts without limiting to a specific organ or system.
The 0W code group includes diverse root operations such as Alteration (0W0), which modifies an anatomical structure without changing its function, and Bypass (0W1), which alters the passage route inside a tubular body part. Other important operations include Inspection (0WJ) for visual or manual examination, Insertion (0WH) of non-biological appliances supporting physiological functions, and Repair (0WQ) aimed at restoring normal anatomy and function. Additionally, codes cover procedures like Drainage (0W9), Excision (0WB), and Transplantation (0WY), each targeting specific clinical goals. These key ICD-10-PCS root operations enable precise coding of procedures affecting general anatomical regions, supporting accurate clinical documentation and billing across multiple surgical interventions.
Questions About This Page
How many codes are in the 0W body system?
The 0W body system contains 4,536 ICD-10-PCS codes in FY 2026, organized into 18 root operations. 4,500 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.
