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Official Description

Laminectomy with myelotomy (eg, Bischof or DREZ type), cervical, thoracic, or thoracolumbar

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 63170 refers to a laminectomy with myelotomy, specifically targeting the cervical, thoracic, or thoracolumbar regions of the spine. A laminectomy is a surgical procedure that involves the removal of a portion of the lamina, which is the bony arch of the vertebra that covers the spinal canal. This procedure is often performed to relieve pressure on the spinal cord or nerve roots. Myelotomy, on the other hand, involves making an incision into the spinal cord itself. This combination of procedures is typically indicated for patients suffering from intractable pain due to malignant neoplasms or neuropathic pain resulting from spinal nerve root avulsion. Additionally, it is utilized for managing end zone or boundary pain that may occur following a spinal cord injury. The surgical approach begins with an incision in the skin over the targeted spinal region, extending down to the spinous processes, allowing access to the underlying structures. The muscles are carefully retracted to expose the lamina and facet joint, and a bone drill is employed to remove the necessary bony structures to access the spinal cord. The myelotomy is then performed at the appropriate spinal cord region, which may involve techniques such as DREZ lesioning or Bishop myelotomy, each serving specific therapeutic purposes in pain management and spasticity treatment.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The laminectomy with myelotomy procedure is indicated for specific conditions that result in severe pain or spasticity. The following are the primary indications for performing this procedure:

  • Intractable Pain Due to Malignant Neoplasm This procedure is performed to alleviate severe, persistent pain associated with malignant tumors affecting the spinal region.
  • Neuropathic Pain Due to Spinal Nerve Root Avulsion It is indicated for patients experiencing neuropathic pain resulting from the avulsion of spinal nerve roots, which can lead to debilitating pain sensations.
  • End Zone or Boundary Pain Following Spinal Cord Injury The procedure is also indicated for managing specific pain types, such as end zone or boundary pain, that may arise after a spinal cord injury.
  • Spasticity of the Lower Extremities In cases where spasticity affects the lower extremities, a Bishop myelotomy may be performed to help manage this condition.

2. Procedure

The laminectomy with myelotomy procedure involves several critical steps to ensure effective treatment. The following outlines the procedural steps:

  • Step 1: Skin Incision The procedure begins with a careful incision of the skin over the cervical, thoracic, or thoracolumbar region, where the myelotomy will be performed. This incision is extended down to the spinous processes to provide adequate access to the underlying structures.
  • Step 2: Muscle Retraction Once the skin is incised, the muscles are retracted away from the lamina and facet joint. This retraction is essential to expose the bony structures and the spinal canal adequately.
  • Step 3: Removal of the Lamina A bone drill is then utilized to remove part or all of the lamina, which allows for direct access to the spinal cord. This step is crucial for exposing the area where the myelotomy will be performed.
  • Step 4: Exposure of the Spinal Cord After the lamina is removed, the spinal cord is exposed, providing the surgeon with the necessary visibility to perform the myelotomy.
  • Step 5: Incision of the Spinal Cord The appropriate region of the spinal cord is then incised. Depending on the specific technique used, such as DREZ lesioning or Bishop myelotomy, the incision may disrupt pain pathways or address spasticity. DREZ myelotomy involves making an incision that interrupts the input and outflow in the superficial layers of the spinal cord dorsal horn, while Bishop myelotomy focuses on treating spasticity through a longitudinal incision in the lateral column of the spinal cord.

3. Post-Procedure

Post-procedure care following a laminectomy with myelotomy is critical for patient recovery and monitoring. Patients may require close observation for any signs of complications, such as infection or neurological deficits. Pain management strategies will be implemented to address postoperative discomfort. Rehabilitation may be necessary to help patients regain strength and mobility, particularly if spasticity was a primary concern. The expected recovery period can vary based on individual patient factors and the extent of the procedure performed. Follow-up appointments will be essential to assess the effectiveness of the surgery and to monitor for any recurrence of symptoms.

Short Descr INCISE SPINAL CORD TRACT(S)
Medium Descr LAM W/MYELOTOMY CERVICAL/THORACIC/THORACOLUMBAR
Long Descr Laminectomy with myelotomy (eg, Bischof or DREZ type), cervical, thoracic, or thoracolumbar
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) 0 - 150% payment adjustment for bilateral procedures does NOT apply.
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) P1F - Major procedure - explor/decompr/excis disc
MUE 1
CCS Clinical Classification 3 - Laminectomy, excision intervertebral disc

This is a primary code that can be used with these additional add-on codes.

22840 Addon Code MPFS Status: Active Code APC N ASC N1 Physician Quality Reporting CPT Assistant Article Posterior non-segmental instrumentation (eg, Harrington rod technique, pedicle fixation across 1 interspace, atlantoaxial transarticular screw fixation, sublaminar wiring at C1, facet screw fixation) (List separately in addition to code for primary procedure)
22841 Addon Code MPFS Status: Bundled Code APC C Physician Quality Reporting CPT Assistant Article Internal spinal fixation by wiring of spinous processes (List separately in addition to code for primary procedure)
22842 Addon Code MPFS Status: Active Code APC N ASC N1 Physician Quality Reporting CPT Assistant Article Posterior segmental instrumentation (eg, pedicle fixation, dual rods with multiple hooks and sublaminar wires); 3 to 6 vertebral segments (List separately in addition to code for primary procedure)
22843 Addon Code MPFS Status: Active Code APC C Physician Quality Reporting CPT Assistant Article Posterior segmental instrumentation (eg, pedicle fixation, dual rods with multiple hooks and sublaminar wires); 7 to 12 vertebral segments (List separately in addition to code for primary procedure)
22844 Addon Code MPFS Status: Active Code APC C Physician Quality Reporting CPT Assistant Article Posterior segmental instrumentation (eg, pedicle fixation, dual rods with multiple hooks and sublaminar wires); 13 or more vertebral segments (List separately in addition to code for primary procedure)
22845 Addon Code MPFS Status: Active Code APC N ASC N1 Physician Quality Reporting CPT Assistant Article Illustration for Code Anterior instrumentation; 2 to 3 vertebral segments (List separately in addition to code for primary procedure)
22846 Addon Code MPFS Status: Active Code APC C Physician Quality Reporting CPT Assistant Article Illustration for Code Anterior instrumentation; 4 to 7 vertebral segments (List separately in addition to code for primary procedure)
22847 Addon Code MPFS Status: Active Code APC C Physician Quality Reporting CPT Assistant Article Illustration for Code Anterior instrumentation; 8 or more vertebral segments (List separately in addition to code for primary procedure)
22848 Addon Code MPFS Status: Active Code APC N Physician Quality Reporting CPT Assistant Article Pelvic fixation (attachment of caudal end of instrumentation to pelvic bony structures) other than sacrum (List separately in addition to code for primary procedure)
22853 CPT Add On MPFS Status: Active Code APC N ASC N1 Insertion of interbody biomechanical device(s) (eg, synthetic cage, mesh) with integral anterior instrumentation for device anchoring (eg, screws, flanges), when performed, to intervertebral disc space in conjunction with interbody arthrodesis, each interspace (List separately in addition to code for primary procedure)
22854 CPT Add On MPFS Status: Active Code APC N ASC N1 Insertion of intervertebral biomechanical device(s) (eg, synthetic cage, mesh) with integral anterior instrumentation for device anchoring (eg, screws, flanges), when performed, to vertebral corpectomy(ies) (vertebral body resection, partial or complete) defect, in conjunction with interbody arthrodesis, each contiguous defect (List separately in addition to code for primary procedure)
22859 CPT Add On CPT Resequenced MPFS Status: Active Code APC N ASC N1 Insertion of intervertebral biomechanical device(s) (eg, synthetic cage, mesh, methylmethacrylate) to intervertebral disc space or vertebral body defect without interbody arthrodesis, each contiguous defect (List separately in addition to code for primary procedure)
69990 Addon Code MPFS Status: Restricted APC N ASC N1 PUB 100 CPT Assistant Article 1Microsurgical techniques, requiring use of operating microscope (List separately in addition to code for primary procedure)
51 Multiple procedures: when multiple procedures, other than e/m services, physical medicine and rehabilitation services or provision of supplies (eg, vaccines), are performed at the same session by the same individual, the primary procedure or service may be reported as listed. the additional procedure(s) or service(s) may be identified by appending modifier 51 to the additional procedure or service code(s). note: this modifier should not be appended to designated "add-on" codes (see appendix d).
82 Assistant surgeon (when qualified resident surgeon not available): the unavailability of a qualified resident surgeon is a prerequisite for use of modifier 82 appended to the usual procedure code number(s).
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
GC This service has been performed in part by a resident under the direction of a teaching physician
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