Anatomical Regions, Lower Extremities (0Y) ICD-10-PCS
The 0Y body system covers Medical and Surgical procedures on anatomical regions, lower extremities, with 2,482 ICD-10-PCS codes across 13 root operations, 2,456 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 13 operations · 2,482 codes
| Chars 1–3 | Root Operation | Codes | Billable |
|---|---|---|---|
| 0Y0 | AlterationModifying the anatomic structure of a body part without affecting the function of the body part | 290 | 288 |
| 0Y2 | 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 | 10 | 8 |
| 0Y3 | ControlStopping, or attempting to stop, postprocedural bleeding | 110 | 108 |
| 0Y6 | DetachmentCutting off all or part of the upper or lower extremities | 160 | 158 |
| 0Y9 | DrainageTaking or letting out fluids and/or gases from a body part | 326 | 324 |
| 0YB | ExcisionCutting out or off, without replacement, a portion of a body part | 218 | 216 |
| 0YH | 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 | 326 | 324 |
| 0YJ | InspectionVisually and/or manually exploring a body part | 162 | 160 |
| 0YM | ReattachmentPutting back in or on all or a portion of a separated body part to its normal location or other suitable location | 64 | 62 |
| 0YP | RemovalTaking out or off a device from a body part | 114 | 112 |
| 0YQ | RepairRestoring, to the extent possible, a body part to its normal anatomic structure and function | 242 | 240 |
| 0YU | SupplementPutting in or on biological or synthetic material that physically reinforces and/or augments the function of a body part | 362 | 360 |
| 0YW | RevisionCorrecting, to the extent possible, a portion of a malfunctioning device or the position of a displaced device | 98 | 96 |
The info icon shows the official root operation definition and previews the codes in that range.
About the 0Y Body System
The ICD-10-PCS Root Operations for the Lower Extremities body region within the Medical and Surgical section refer to a variety of procedural intents, each aimed at specific modifications, repairs, or examinations of anatomical structures in the lower limbs.
These operations include Alteration (0Y0), where the anatomic structure is modified without affecting function, and Detachment (0Y6), which involves cutting off all or part of the upper or lower extremities. Procedures like Insertion (0YH) and Supplement (0YU) describe placing appliances or reinforcing materials that assist or strengthen body parts without replacing them. Other root operations such as Control (0Y3) stop bleeding, while Drainage (0Y9) involves removing fluids or gases. Additionally, Inspection (0YJ) refers to visually or manually exploring a body part, and Repair (0YQ) focuses on restoring normal anatomy and function. These codes allow precise documentation of procedures ranging from device Removal (0YP) to Revision (0YW), which corrects device malfunction or displacement. Collectively, these terms cover comprehensive procedural coding for various surgical and non-surgical interventions on the lower extremities.
Questions About This Page
How many codes are in the 0Y body system?
The 0Y body system contains 2,482 ICD-10-PCS codes in FY 2026, organized into 13 root operations. 2,456 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.
