CPT® Code 63180

Official Description

Laminectomy and section of dentate ligaments, with or without dural graft, cervical; 1 or 2 segments

Common Language Description

The procedure described by CPT® Code 63180 involves a laminectomy and the sectioning of dentate ligaments in the cervical region of the spine, specifically affecting one or two segments. The dentate ligaments are important anatomical structures that serve as lateral extensions of the pia mater, which is the innermost layer of the three membranes that encase the spinal cord. These ligaments extend through the arachnoid layer, the middle membrane, and attach to the dura mater, the outermost layer. There are a total of 21 dentate ligaments on each side of the spinal cord, spanning from the cervical vertebrae (C1) down to the thoracic vertebrae (T12). The primary function of the dentate ligaments is to create a longitudinal plane that separates the spinal cord into anterior and posterior regions, effectively organizing the spinal cord's structure. This organization is crucial as the ligaments spread out between the nerve roots, dividing the dorsal (posterior) and ventral (anterior) nerve roots. In cases where these ligaments become thickened or develop fibrosis, they can exert pressure on the adjacent nerve roots, leading to pain and neurological symptoms. The surgical intervention of sectioning the dentate ligaments is specifically indicated for the cervical spine, where the impingement on nerve roots occurs. The procedure begins with an incision over the cervical area where the dentate ligament is causing nerve root compression. The incision is deepened to reach the spinous processes, and the surrounding muscle is retracted to expose the lamina and facet joint. A bone drill is then utilized to remove part or all of the lamina, allowing access to the spinal cord and identification of the affected nerve roots. The dura mater is incised over the thickened dentate ligament, and the ligaments are sectioned to alleviate the pressure on the nerve roots. After the nerve roots are freed, the dural incision is closed, either with sutures or by using a graft to patch the dural membrane. This procedure is coded as 63180 when performed on one or two levels, while 63182 is used for procedures involving more than two levels.

1. Indications

The procedure described by CPT® Code 63180 is indicated for specific conditions where the dentate ligaments are causing nerve root compression in the cervical spine. The following are the explicit indications for performing this procedure:

Thickened Dentate Ligaments - When the dentate ligaments become thickened, they can impinge on the adjacent nerve roots, leading to pain and neurological symptoms.
Fibrosis of Dentate Ligaments - The presence of fibrosis in the dentate ligaments can also result in nerve root compression, necessitating surgical intervention to relieve symptoms.
Cervical Radiculopathy - Patients experiencing cervical radiculopathy due to the compression of nerve roots by the dentate ligaments may require this procedure for symptom relief.

2. Procedure

The procedure for CPT® Code 63180 involves several critical steps to effectively relieve nerve root compression caused by the dentate ligaments. The following outlines the procedural steps:

Step 1: Incision - The surgical process begins with an incision made over the cervical region where the dentate ligament is impinging on the nerve roots. This incision is carefully extended down to the spinous processes to provide adequate access to the underlying structures.
Step 2: Muscle Retraction - Once the incision is made, the surrounding muscle tissue is retracted away from the lamina and facet joint to expose the necessary anatomical structures for the procedure.
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 allows for direct exposure of the spinal cord and the affected nerve roots.
Step 4: Identification of Nerve Roots - With the spinal cord exposed, the surgeon identifies the affected nerve roots that are being compressed by the thickened dentate ligaments.
Step 5: Dural Incision - The dura mater, which is the outermost membrane covering the spinal cord, is incised over the area where the dentate ligament is thickened. This step is necessary to access the ligaments directly.
Step 6: Sectioning of Dentate Ligaments - The dentate ligaments are then sectioned (cut) to relieve the pressure exerted on the dorsal and ventral nerve roots. This is the critical step that alleviates the symptoms caused by the compression.
Step 7: Closure - After the nerve roots are freed from the impinging ligament, the dural incision is closed using sutures. Alternatively, a graft may be employed to patch the dural membrane, ensuring that the protective covering of the spinal cord is restored.

3. Post-Procedure

Post-procedure care following a laminectomy and sectioning of dentate ligaments is essential for optimal recovery. Patients can expect a period of monitoring for any complications related to the surgery. Pain management will be a priority, and patients may be prescribed analgesics to manage discomfort. Rehabilitation may be recommended to restore mobility and strength in the cervical region. Follow-up appointments will be necessary to assess the surgical site and ensure proper healing. Patients should be advised to report any unusual symptoms, such as increased pain, numbness, or weakness, as these may indicate complications that require further evaluation.

Short Descr	REVISE SPINAL CORD LIGAMENTS
Medium Descr	LAM&SCTJ DENTATE LIG W/WO DURAL GRF CRV 1/2 SEG
Long Descr	Laminectomy and section of dentate ligaments, with or without dural graft, cervical; 1 or 2 segments
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	Not applicable/unspecified.
CCS Clinical Classification	3 - Laminectomy, excision intervertebral disc