Head and Facial Bones (0N) ICD-10-PCS
The 0N body system covers Medical and Surgical procedures on head and facial bones, with 3,302 ICD-10-PCS codes across 17 root operations, 3,268 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 17 operations · 3,302 codes
| Chars 1–3 | Root Operation | Codes | Billable |
|---|---|---|---|
| 0N2 | 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 | 14 | 12 |
| 0N5 | DestructionPhysical eradication of all or a portion of a body part by the direct use of energy, force or a destructive agent | 140 | 138 |
| 0N8 | DivisionCutting into a body part without draining fluids and/or gases from the body part in order to separate or transect a body part | 140 | 138 |
| 0N9 | DrainageTaking or letting out fluids and/or gases from a body part | 416 | 414 |
| 0NB | ExcisionCutting out or off, without replacement, a portion of a body part | 278 | 276 |
| 0NC | ExtirpationTaking or cutting out solid matter from a body part | 134 | 132 |
| 0ND | ExtractionPulling or stripping out or off all or a portion of a body part by the use of force | 48 | 46 |
| 0NH | 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 | 202 | 200 |
| 0NJ | InspectionVisually and/or manually exploring a body part | 26 | 24 |
| 0NN | ReleaseFreeing a body part from an abnormal physical constraint by cutting or by use of force | 134 | 132 |
| 0NP | RemovalTaking out or off a device from a body part | 170 | 168 |
| 0NQ | RepairRestoring, to the extent possible, a body part to its normal anatomic structure and function | 186 | 184 |
| 0NR | 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 | 416 | 414 |
| 0NS | RepositionMoving to its normal location or other suitable location all or a portion of a body part | 348 | 346 |
| 0NT | ResectionCutting out or off, without replacement, all of a body part | 46 | 44 |
| 0NU | SupplementPutting in or on biological or synthetic material that physically reinforces and/or augments the function of a body part | 416 | 414 |
| 0NW | RevisionCorrecting, to the extent possible, a portion of a malfunctioning device or the position of a displaced device | 188 | 186 |
The info icon shows the official root operation definition and previews the codes in that range.
About the 0N Body System
The Medical and Surgical section for the ICD-10-PCS body system Head and Facial Bones includes multiple root operations that describe various procedures involving these structures. These root operations identify what is being done during surgery or other interventions on the head and facial bones.
For example, the root operation Change (0N2) entails removing a device from the head or facial bones and replacing it with an identical or similar device without cutting the skin. Destruction (0N5) refers to the physical eradication of all or part of a bone using energy or force. Procedures like Inspection (0NJ) involve visually or manually exploring these bones. Other key operations include Insertion (0NH), which means placing a non-biological device that supports function without replacing bone, and Repair (0NQ), which seeks to restore the normal anatomy and function of the bones. These varied root operations allow detailed coding for interventions, from draining fluids (0N9) to resection (0NT)—cutting out all of a body part without replacement—offering precise documentation of surgical care involving the head and facial bones.
Questions About This Page
How many codes are in the 0N body system?
The 0N body system contains 3,302 ICD-10-PCS codes in FY 2026, organized into 17 root operations. 3,268 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.
