Table 1. Current Procedural Terminology (CPT) codes.

that were used to include spine fusion patients as well as categorize the surgical procedure types for the present study.

CPT	Description
22800	Arthrodesis, posterior, for spinal deformity, with or without cast; up to 6 vertebral segments
22842	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)
22802	Arthrodesis, posterior, for spinal deformity, with or without cast; 7 to 12 vertebral segments
22843	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)
22804	Arthrodesis, posterior, for spinal deformity, with or without cast; 13 or more vertebral segments
22844	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)
22808	Arthrodesis, anterior, for spinal deformity, with or without cast; 2 to 3 vertebral segments
22845	Anterior instrumentation; 2 to 3 vertebral segments (List separately in addition to code for primary procedure)
22810	Arthrodesis, anterior, for spinal deformity, with or without cast; 4 to 7 vertebral segments
22846	Anterior instrumentation; 4 to 7 vertebral segments (List separately in addition to code for primary procedure)
22812	Arthrodesis, anterior, for spinal deformity, with or without cast; 8 or more vertebral segments
22847	Anterior instrumentation; 8 or more vertebral segments (List separately in addition to code for primary procedure)