Lower Arteries (04) ICD-10-PCS
The 04 body system covers Medical and Surgical procedures on lower arteries, with 5,041 ICD-10-PCS codes across 18 root operations, 5,023 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 · 5,041 codes
| Chars 1–3 | Root Operation | Codes | Billable |
|---|---|---|---|
| 041 | BypassAltering the route of passage of the contents of a tubular body part | 1,561 | 1,560 |
| 045 | DestructionPhysical eradication of all or a portion of a body part by the direct use of energy, force or a destructive agent | 94 | 93 |
| 047 | DilationExpanding an orifice or the lumen of a tubular body part | 1,157 | 1,156 |
| 049 | DrainageTaking or letting out fluids and/or gases from a body part | 280 | 279 |
| 04B | ExcisionCutting out or off, without replacement, a portion of a body part | 187 | 186 |
| 04C | ExtirpationTaking or cutting out solid matter from a body part | 94 | 93 |
| 04F | FragmentationBreaking solid matter in a body part into pieces | 35 | 34 |
| 04H | 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 | 196 | 195 |
| 04J | InspectionVisually and/or manually exploring a body part | 5 | 4 |
| 04L | OcclusionCompletely closing an orifice or the lumen of a tubular body part | 318 | 317 |
| 04N | ReleaseFreeing a body part from an abnormal physical constraint by cutting or by use of force | 94 | 93 |
| 04P | RemovalTaking out or off a device from a body part | 33 | 32 |
| 04Q | RepairRestoring, to the extent possible, a body part to its normal anatomic structure and function | 94 | 93 |
| 04R | ReplacementPutting in or on biological or synthetic material that physically takes the place and/or function of all or a portion of a body part | 187 | 186 |
| 04S | RepositionMoving to its normal location or other suitable location all or a portion of a body part | 94 | 93 |
| 04U | SupplementPutting in or on biological or synthetic material that physically reinforces and/or augments the function of a body part | 281 | 280 |
| 04V | RestrictionPartially closing an orifice or the lumen of a tubular body part | 295 | 294 |
| 04W | RevisionCorrecting, to the extent possible, a portion of a malfunctioning device or the position of a displaced device | 36 | 35 |
The info icon shows the official root operation definition and previews the codes in that range.
About the 04 Body System
The ICD-10-PCS root operations for the Lower Arteries within the Medical and Surgical section encompass a range of procedures targeting the arteries of the lower body. These operations define various ways medical professionals treat, modify, or examine these critical blood vessels.
For example, the root operation Bypass (Code 041) involves altering the route of blood flow through the artery. Destruction (045) refers to physically eradicating part or all of a vessel using energy or force. Dilation (047) expands the vessel lumen, while Drainage (049) allows fluids or gases to be released. Cutting procedures like Excision (04B) remove a portion of the artery, and Extirpation (04C) extracts solid matter from it. Implant-related operations include Insertion (04H) of devices and Replacement (04R) of parts with biological or synthetic material. Additionally, Occlusion (04L) completely closes the artery lumen, whereas Restriction (04V) partially closes it. These examples demonstrate the diverse interventions captured by lower artery codes, reflecting the complex vascular procedures coded in ICD-10-PCS.
Questions About This Page
How many codes are in the 04 body system?
The 04 body system contains 5,041 ICD-10-PCS codes in FY 2026, organized into 18 root operations. 5,023 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.
