CPT code 63066 represents an additional thoracic spinal decompression performed in the same operative session after the initial thoracic segment is treated. The code applies when a surgeon relieves spinal cord or nerve root pressure — for example, by removing part of an intervertebral disc — using a costovertebral approach where the ribs and thoracic spine meet. This descriptor matters nationally because thoracic decompression procedures, while less common than cervical or lumbar operations, involve complex anatomy and can drive surgical resource use, length of stay, and payment considerations across hospital and ambulatory surgical settings.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the code's clinical intent and typical site of service, plus context on how the code is applied when multiple thoracic segments are treated in one session. The publication summarizes benchmarks and reimbursement considerations where available, highlights clinical context for documentation and coding clarity, and notes where supplemental data are not available in the input. This summary is written for a national audience and focuses on clinical definition, service setting, and payer scope rather than state-specific policy.