Anatomical Regions, Lower Extremities (0Y) ICD-10-PCS
The 0Y body system covers Medical and Surgical procedures on anatomical regions, lower extremities, with 1,241 ICD-10-PCS codes across 13 root operations, 1,228 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 13 operations · 1,241 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 | 145 | 144 |
| 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 | 5 | 4 |
| 0Y3 | ControlStopping, or attempting to stop, postprocedural bleeding | 55 | 54 |
| 0Y6 | DetachmentCutting off all or part of the upper or lower extremities | 80 | 79 |
| 0Y9 | DrainageTaking or letting out fluids and/or gases from a body part | 163 | 162 |
| 0YB | ExcisionCutting out or off, without replacement, a portion of a body part | 109 | 108 |
| 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 | 163 | 162 |
| 0YJ | InspectionVisually and/or manually exploring a body part | 81 | 80 |
| 0YM | ReattachmentPutting back in or on all or a portion of a separated body part to its normal location or other suitable location | 32 | 31 |
| 0YP | RemovalTaking out or off a device from a body part | 57 | 56 |
| 0YQ | RepairRestoring, to the extent possible, a body part to its normal anatomic structure and function | 121 | 120 |
| 0YU | SupplementPutting in or on biological or synthetic material that physically reinforces and/or augments the function of a body part | 181 | 180 |
| 0YW | RevisionCorrecting, to the extent possible, a portion of a malfunctioning device or the position of a displaced device | 49 | 48 |
The info icon shows the official root operation definition and previews the codes in that range.
About the 0Y Body System
These procedures involve lower-extremity regions such as the buttock, leg, knee, ankle, foot and individual toes. The body-part values distinguish right from left and include bilateral values for some regions.
Some tables cover cutting off all or part of an extremity, removing a portion of a body part, or draining fluid or gas. Others cover examining a body part by sight or touch, changing its shape without affecting function, repairing it, reattaching it, or reinforcing it with material. Device procedures include putting in, changing or removing a device, and correcting a malfunctioning or displaced device. Another table covers stopping or attempting to stop acute bleeding.
Questions About This Page
How many codes are in the 0Y body system?
The 0Y body system contains 1,241 ICD-10-PCS codes in FY 2027, organized into 13 root operations. 1,228 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.
