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Official Description

Laminectomy with section of spinal accessory nerve

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 63191 involves a laminectomy with sectioning of the spinal accessory nerve, which is also known as cranial nerve XI (CN XI). This nerve is primarily responsible for motor functions and originates from nerve cell bodies located in the cervical spinal cord and the caudal medulla. The spinal accessory nerve innervates key muscles in the neck and back, specifically the sternocleidomastoid and trapezius muscles. The sectioning of this nerve is typically indicated for the treatment of severe spasmodic torticollis, a condition also referred to as cervical dystonia. Spasmodic torticollis is characterized by involuntary muscle contractions that lead to abnormal head positioning, accompanied by pain and numbness that may radiate into the shoulder, arm, and hand. The surgical approach begins with an incision over one or more cervical vertebrae, which is then extended to expose the underlying structures. The procedure involves retracting the muscles away from the lamina and facet joint, followed by the use of a bone drill to remove part or all of the lamina, thereby exposing the spinal cord. Once the spinal accessory nerve is identified, electrical stimulation is applied to individual nerve fibers to pinpoint the specific motor fibers responsible for the spasticity and associated pain, after which these nerve fibers are sectioned to alleviate the symptoms.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure is indicated for the following conditions:

  • Severe Spasmodic Torticollis - This condition, also known as cervical dystonia, is characterized by involuntary muscle contractions that result in abnormal head positioning and discomfort.

2. Procedure

The laminectomy with section of the spinal accessory nerve involves several critical procedural steps:

  • Step 1: Incision - The procedure begins with a surgical incision made over one or more cervical vertebrae. This incision is carefully extended to allow access to the deeper anatomical structures.
  • Step 2: Muscle Retraction - Once the incision is made, the surrounding muscles are retracted away from the lamina and facet joint to provide a clear view of the spinal structures that need to be accessed.
  • Step 3: Laminectomy - A bone drill is utilized to remove part or all of the lamina, which is the bony arch of the vertebra. This step is crucial as it exposes the spinal cord and the underlying nerve structures.
  • Step 4: Identification of the Spinal Accessory Nerve - After the lamina is removed, the spinal cord is exposed, and the spinal accessory nerve is identified. This identification is essential for the subsequent steps of the procedure.
  • Step 5: Electrical Stimulation - Selective electrical stimulation is applied to individual spinal accessory nerve fibers. This technique helps to identify the specific motor fibers that are contributing to the spasticity and pain experienced by the patient.
  • Step 6: Sectioning of Nerve Fibers - Finally, the identified nerve fibers that are responsible for the symptoms are cut, which aims to alleviate the involuntary muscle contractions and associated discomfort.

3. Post-Procedure

Post-procedure care typically involves monitoring the patient for any immediate complications related to the surgery. Patients may experience some discomfort at the incision site and in the neck area, which can be managed with appropriate pain relief measures. Rehabilitation may be necessary to help restore function and mobility in the neck and shoulders. Follow-up appointments are essential to assess the effectiveness of the procedure and to monitor for any potential complications or recurrence of symptoms.

Short Descr INCISE SPINE ACCESSORY NERVE
Medium Descr LAMINECTOMY W/SECTION SPINAL ACCESSORY NERVE
Long Descr Laminectomy with section of spinal accessory nerve
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) 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)
50 Bilateral procedure: unless otherwise identified in the listings, bilateral procedures that are performed at the same session, should be identified by adding modifier 50 to the appropriate 5 digit code. note: this modifier should not be appended to designated "add-on" codes (see appendix d).
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).
LT Left side (used to identify procedures performed on the left side of the body)
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2013-01-01 Changed Short Descriptor changed.
Pre-1990 Added Code added.
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