0NRG47Z
Replacement Ethmoid Bone, Left to No Qualifier with Autologous Tissue Substitute, Percutaneous Endoscopic Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | N Head and Facial Bones |
| Operation | R Replacement |
| Body Part | G Ethmoid Bone, Left |
| Approach | 4 Percutaneous Endoscopic |
| Device | 7 Autologous Tissue Substitute |
| Qualifier | Z No Qualifier |
Operation Definition
Putting in or on biological or synthetic material that physically takes the place and/or function of all or a portion of a body part
Procedure Overview
Replacement procedures put in biological or synthetic material - such as a cranioplasty plate, custom facial implant, or bone graft - to physically take the place of all or part of a skull or facial bone that is missing, damaged, or was previously removed. This family is used when the goal is not just to fix the existing bone but to substitute new material for a portion that no longer serves its structural role.
Common reasons include reconstructing a skull defect left after a craniectomy for trauma or tumor, rebuilding an orbital floor after a blowout fracture, or restoring facial contour with a custom implant following cancer resection. Patients pursuing these procedures are typically working toward both functional protection of underlying structures, like the brain or eye, and restoration of facial appearance.
Anatomy & Axis Detail
Ethmoid Bone, Left
The left ethmoid bone lies between the nasal cavity and orbit on that side, contributing to the medial orbital wall, part of the nasal roof, and the cribriform plate that transmits olfactory nerve fibers into the anterior cranial fossa. Its fragile, air-cell-filled structure is vulnerable to erosion from sinonasal malignancy, invasive fungal sinusitis, or facial trauma, and replacement becomes necessary when destruction of this bone threatens the barrier separating the nasal cavity from the orbit and intracranial space. Reconstruction in this area must account for the close proximity of the dura and olfactory nerve fibers at the cribriform plate, since disruption here can result in cerebrospinal fluid leakage or loss of smell, making precise, layered repair technique important. The left-sided designation distinguishes the procedure from a right ethmoid replacement, relevant given the paired arrangement of the ethmoid labyrinth flanking the nasal septum.
Approach: Percutaneous Endoscopic
Percutaneous Endoscopic combines a puncture through skin or mucous membrane with insertion of an endoscope to visualize the procedure internally, as in laparoscopic cholecystectomy. It is distinguished from plain Percutaneous by the presence of scope-guided visualization, and from Via Natural or Artificial Opening Endoscopic by its route being a new puncture rather than an existing orifice or stoma.
Device: Autologous Tissue Substitute
Autologous Tissue Substitute identifies a device value where material harvested from the patient's own body, such as an autograft, is used to replace or reconstruct a body part. Its defining feature is tissue origin from the patient, setting it apart from Nonautologous Tissue Substitute, sourced from a donor or animal, and Synthetic Substitute, made of manufactured material.
Coding & Documentation
Documentation should specify the material used, whether an autologous bone graft, titanium mesh, or synthetic implant, and confirm that it is taking the place of bone rather than merely reinforcing it. Coders need to identify the specific facial or cranial bone being replaced, since body part selection within this family is granular. A frequent error is coding Replacement when a graft is instead used to support a repair rather than substitute for missing bone, and another is confusing a temporary spacer or external fixation device, which does not qualify as replacement material, with a permanent implant.