CPT® Code 63182

Official Description

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

Common Language Description

The procedure described by CPT® Code 63182 involves a laminectomy and sectioning of the dentate ligaments in the cervical region of the spine, specifically when more than two segments are affected. The dentate ligaments are important anatomical structures that extend laterally from the pia mater, which is the innermost layer of the three membranes that encase the spinal cord. These ligaments traverse 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 first cervical vertebra (C1) to the twelfth thoracic vertebra (T12). Their primary function is to create a longitudinal plane that divides the spinal cord into anterior and posterior sections, effectively separating the dorsal and ventral nerve roots. When these ligaments become thickened or develop fibrosis, they can exert pressure on the adjacent nerve roots, leading to pain and other neurological symptoms. The surgical intervention of sectioning the dentate ligaments is specifically indicated for cases where these ligaments in the cervical spine are causing such impingement. The procedure begins with an incision over the cervical area where the nerve roots are being compressed. 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, which is subsequently sectioned to alleviate the pressure on the nerve roots. After the ligaments are cut, the dural incision is either sutured closed or patched with a graft to ensure proper healing. This procedure is distinct from similar interventions that involve sectioning the dentate ligaments at one or two levels, which is coded differently under CPT® Code 63180.

1. Indications

The procedure described by CPT® Code 63182 is indicated for patients experiencing symptoms related to the impingement of nerve roots caused by thickened or fibrotic dentate ligaments in the cervical spine. The following conditions may warrant this surgical intervention:

Chronic Pain Persistent pain in the neck or upper extremities due to nerve root compression.
Neurological Symptoms Symptoms such as numbness, tingling, or weakness in the arms or hands resulting from nerve root irritation.
Motor Dysfunction Impairment in motor function or coordination in the upper limbs due to spinal cord compression.

2. Procedure

The procedure for CPT® Code 63182 involves several critical steps to effectively relieve pressure on the affected nerve roots. 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 causing nerve root impingement. 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. This retraction is essential to expose the bony structures of the spine and facilitate the next steps of the procedure.
Step 3: Laminectomy A bone drill is employed 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 visualization of the spinal cord and the affected nerve roots.
Step 4: Identification of Nerve Roots With the lamina removed, the spinal cord is exposed, and the surgeon identifies the specific nerve roots that are being compressed by the thickened dentate ligaments.
Step 5: Dural Incision The dura mater, which is the protective covering of the spinal cord, is incised over the area where the dentate ligament is thickened. This incision is necessary to access the ligament directly.
Step 6: Sectioning of Dentate Ligaments The dentate ligaments are then sectioned, or cut, to relieve the pressure exerted on the dorsal and ventral nerve roots. This step is critical for alleviating the symptoms associated with nerve root compression.
Step 7: Closure After the nerve roots are freed from the impinging ligaments, the dural incision is closed using sutures. Alternatively, a graft may be utilized 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 the dentate ligaments involves monitoring the patient for any immediate complications and managing pain effectively. Patients are typically advised to follow specific recovery protocols, which may include physical therapy to regain strength and mobility in the cervical region. It is essential to monitor for signs of infection at the incision site and to ensure that the patient adheres to any prescribed activity restrictions to promote healing. Follow-up appointments are crucial to assess the surgical outcome and to address any ongoing symptoms or concerns.

Short Descr	REVISE SPINAL CORD LIGAMENTS
Medium Descr	LAM&SCTJ DENTATE LIG W/WO DURAL GRF CRV >2 SEG
Long Descr	Laminectomy and section of dentate ligaments, with or without dural graft, cervical; more than 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