CPT code 22844 documents extensive posterior spinal instrumentation across 13 or more vertebral segments performed during spinal fusion or arthrodesis for deformity correction. This high-acuity surgical code captures complex operative work, significant device use, and extended intraoperative and perioperative resources, making it clinically and financially material for national spine surgery programs and payers.

Key payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical intent and procedural scope of the code, typical sites of service, common modifiers (listed separately), and the payer coverage landscape. The publication summarizes typical utilization contexts—complex spinal deformity corrections requiring long-segment posterior instrumentation—and highlights relevant benchmarking areas such as allowed amounts, utilization frequency, and inpatient resource implications.

The summary provides context for clinicians, coding professionals, and policy analysts seeking to understand billing capture and payer recognition for large-segment posterior spinal instrumentation, and outlines where to find details on coding edits, bundling considerations, and payment policy updates. Data not available in the input is noted where applicable.