CPT code 22558 represents an anterior lumbar arthrodesis (spinal fusion) procedure in which the surgeon accesses the lower spine through an abdominal incision to remove disk material and permanently join two vertebrae. This surgical code matters nationally because spinal fusion procedures are common, resource-intensive interventions with significant implications for hospital resource use, payer coverage policies, and postoperative care pathways.

Key payers examined include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the procedure, an overview of where the service is typically delivered, and what coverage considerations payers commonly evaluate for lumbar fusion surgeries. The publication highlights benchmark metrics, utilization patterns, and relevant policy updates affecting authorization, site-of-service determinations, and inpatient versus outpatient payment rules.

The report helps clinicians, coding professionals, and policy analysts understand how CPT code 22558 is used in practice, what factors influence payer decisions, and where stakeholders may focus efforts to align clinical documentation with coverage criteria. Data not available in the input is noted where applicable.