CPT® Code 63012

Laminectomy with removal of abnormal facets and/or pars inter-articularis with decompression of cauda equina and nerve roots for spondylolisthesis, lumbar (Gill type procedure)

Spondylolisthesis is a spinal condition characterized by the forward displacement of one of the lower lumbar vertebrae, most commonly the fifth lumbar vertebra, over the vertebra directly beneath it. This condition often arises from spondylolysis, which is the degeneration or developmental deficiency of the pars interarticularis, a bony segment located between the superior and inferior articular facets of the vertebra. The procedure described by CPT® Code 63012 involves a laminectomy, which is a surgical operation that entails the removal of the lamina, the bony arch of the vertebra, to relieve pressure on the spinal cord and nerve roots. In this specific case, the surgery also includes the removal of abnormal facets and/or the pars interarticularis, along with decompression of the cauda equina and nerve roots. The surgical approach typically begins with a posterior incision over the affected lumbar vertebrae, followed by careful retraction of the surrounding fat and muscle tissue. The lamina is excised, and the associated ligaments, specifically the ligamentum flavum, are also removed to facilitate access to the spinal canal. The procedure aims to alleviate symptoms associated with nerve compression due to spondylolisthesis, thereby improving the patient's functional outcomes and quality of life.