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Official Description

Exploration of orbit (transcranial approach); with biopsy

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 61332 involves the exploration of the orbit using a transcranial approach, which is a surgical technique that allows access to the orbit through the skull. This approach can be performed in two ways: either by removing the frontal bone while preserving the orbital rim or by removing both the frontal bone and the supraorbital arch. The primary purpose of this procedure is to gain access to the superomedial aspect of the orbit, particularly for addressing lesions or defects located at the orbital apex, optic canal, or those that involve both the orbit and adjacent intracranial structures. The procedure begins with a bicoronal incision, which is made across the scalp, allowing for the reflection of the scalp to expose the underlying structures. Subsequently, burr holes are drilled above the orbital rims to facilitate the removal of the frontal bone. The dura mater, which is the outermost layer of the meninges covering the brain, is carefully reflected to expose the floor of the frontal fossa. This meticulous approach ensures that the frontal lobe can be retracted safely, allowing for a clear view of the surgical field. The procedure culminates in the identification and biopsy of abnormal tissue within the orbit, which is crucial for diagnostic purposes. Following the exploration and biopsy, the surgical team reconstructs the orbit and secures the frontal bone back in place, ensuring proper healing and restoration of the anatomical structures.

© Copyright 2026 Coding Ahead. All rights reserved.

1. Indications

The exploration of the orbit via a transcranial approach, as described in CPT® Code 61332, is indicated for various conditions that necessitate direct access to the orbit and surrounding structures. The following are the explicitly provided indications for this procedure:

  • Lesions at the Orbital Apex - This procedure is performed to access and evaluate lesions located at the apex of the orbit, which may require biopsy or removal.
  • Optic Canal Involvement - Conditions involving the optic canal, which may affect vision or cause other neurological symptoms, can be addressed through this surgical approach.
  • Defects Involving Both Orbit and Intracranial Structures - The procedure is indicated for cases where there are defects that extend from the orbit into the intracranial space, necessitating careful exploration and intervention.

2. Procedure

The procedural steps for the exploration of the orbit using a transcranial approach are as follows:

  • Bicoronal Incision - The procedure begins with the creation of a bicoronal incision across the scalp, which allows for the reflection of the scalp to expose the underlying bony structures of the skull.
  • Placement of Burr Holes - Medial and frontal burr holes are drilled above the orbital rims to facilitate access to the frontal bone. These burr holes are critical for the subsequent steps of the procedure.
  • Removal of Frontal Bone - A bone saw is utilized to connect the burr holes, allowing for the removal of the frontal bone. This step is essential for gaining access to the orbit.
  • Reflection of the Dura - The dura mater is carefully reflected away from the floor of the frontal fossa, ensuring that the underlying brain structures are protected during the procedure.
  • Retraction of the Frontal Lobe - The frontal lobe is gently retracted to expose the floor of the frontal fossa, providing a clear view of the surgical field for further exploration.
  • Osteotomy of the Orbital Rim - An osteotomy is performed on the orbital rim or frontal bar by drilling inferomedial and inferolateral burr holes, which are then connected using a reciprocating saw to facilitate access to the orbit.
  • Transverse Osteotomy - A transverse osteotomy is performed to complete the release of the orbital rim, allowing for full exposure of the orbit.
  • Biopsy of Abnormal Tissue - Once the orbit is adequately exposed, the area of abnormal tissue is located, and a tissue sample is obtained for diagnostic purposes.
  • Reconstruction of the Orbit - After the biopsy, the orbital bony structures are replaced, and the orbit is reconstructed to restore its anatomical integrity.
  • Inspection of the Dura - The dura is inspected for any signs of injury to ensure that no damage has occurred during the procedure.
  • Replacement of the Frontal Bone - The frontal bone is then replaced and secured in position using miniplates and screws to ensure stability during the healing process.
  • Repair of Soft Tissues and Skin - Finally, the overlying soft tissues and skin are meticulously repaired to complete the surgical procedure.

3. Post-Procedure

Post-procedure care following the exploration of the orbit via a transcranial approach involves monitoring for any complications, such as infection or cerebrospinal fluid leaks. Patients are typically observed for neurological status and any signs of complications related to the surgery. Pain management is provided as needed, and instructions for wound care are given to ensure proper healing. Follow-up appointments are essential to assess recovery and to evaluate the biopsy results obtained during the procedure. The overall recovery time may vary depending on the extent of the surgery and the individual patient's health status.

Short Descr EXPLORE/BIOPSY EYE SOCKET
Medium Descr EXPLORATION ORBIT TRANSCRANIAL APPROACH W/BIOPSY
Long Descr Exploration of orbit (transcranial approach); with biopsy
Status Code Active Code
Global Days 090 - Major Surgery
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 2 - Standard payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 1 - 150% payment adjustment for bilateral procedures applies.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 2 - Payment restriction for assistants at surgery does not apply to this procedure...
Co-Surgeons (62) 1 - Co-surgeons could be paid, though supporting documentation is required...
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Inpatient Procedures, not paid under OPPS
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P1G - Major procedure - Other
MUE Not applicable/unspecified.
CCS Clinical Classification 18 - Diagnostic procedures on eye
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2019-01-01 Deleted Code deleted
Pre-1990 Added Code added.
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