0NC43ZZ
Extirpation Parietal Bone, Left to No Qualifier with No Device, Percutaneous Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | N Head and Facial Bones |
| Operation | C Extirpation |
| Body Part | 4 Parietal Bone, Left |
| Approach | 3 Percutaneous |
| Device | Z No Device |
| Qualifier | Z No Qualifier |
Operation Definition
Taking or cutting out solid matter from a body part
Procedure Overview
Extirpation procedures take solid matter out of a skull or facial bone, most often a bone fragment, foreign object, sequestrum from infection, or blood clot that has hardened within the bone. Unlike removing a lesion that is part of the bone's own structure, extirpation clears out material that does not belong there or that has become detached from the surrounding living tissue. This is a frequent step after facial trauma, when bullet fragments, glass, or shattered bone pieces must be removed before the area can heal or be reconstructed.
Another common scenario is chronic osteomyelitis of the jaw or skull, where dead bone (sequestrum) forms and must be physically removed for infection to resolve, since antibiotics alone cannot penetrate non-living bone. Extirpation is also used when a previously placed surgical material, such as old wire, cement, or a bone chip left from an earlier procedure, needs to be taken out. The goal throughout is removal of matter that is loose, dead, or foreign, leaving the surrounding living bone in place.
Anatomy & Axis Detail
Parietal Bone, Left
The left parietal bone sits opposite its right-sided counterpart, forming the superior-lateral skull over the left cerebral hemisphere and joining adjacent bones at the coronal, sagittal, and lambdoid sutures. Extirpation here removes solid abnormal material such as infected bone sequestra, hematoma-associated debris, or foreign material introduced by penetrating trauma, without excising viable bone tissue. Given the thinness of the parietal plate and its proximity to the sagittal sinus near the midline, the surgeon must work cautiously to avoid venous sinus injury when the pathology lies close to the vertex. This procedure is frequently performed alongside debridement of an open skull fracture or evacuation of an epidural process. Accurate laterality coding distinguishes it from the analogous right-sided procedure.
Approach: Percutaneous
Percutaneous describes entry by needle or instrument puncture through the skin or mucous membrane to reach the site of the procedure, without cutting the tissue open or using a visualizing scope. It differs from Open in that the site itself is never exposed, and from Percutaneous Endoscopic in that no endoscope is used to see internal structures. Common examples include needle biopsies and injections.
Coding & Documentation
Coders rely on operative language specifying that solid, abnormal material, such as a sequestrum, foreign body, or thrombus, was physically removed from within or on the surface of the bone. Documentation should make clear that the material was not a normal component of the bone being excised for disease, since that distinction separates Extirpation from Excision. A common error is coding routine debridement of a fracture site as Extirpation when the surgeon actually excised devitalized bone edges as part of preparing for fixation, which may instead fall under Excision or Repair depending on intent and extent. Coders should also verify the approach used to reach the material, since the same extirpation can be performed open or percutaneously, and the qualifier reflects that.