CPT code 64492 is an add-on procedure code for image-guided injection of a diagnostic or therapeutic substance into a cervical or thoracic paravertebral facet (zygapophyseal) joint, or the nerves supplying that joint, representing the third treated facet level and any additional unilateral levels. The code matters nationally as image-guided spinal injections are common in managing neck and thoracic facet-mediated pain and are subject to payer-specific coverage, utilization controls, and reimbursement policies.

Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of how 64492 is categorized and billed as an add-on service, typical sites of service where it is performed, and the clinical context in which it is used (diagnostic and therapeutic facet joint or medial branch interventions under fluoroscopy or CT guidance). The publication also summarizes common modifiers associated with interventional procedures, payer coverage patterns and coding considerations, and benchmarking elements relevant for practice administrators and billing staff.

This national-level summary is designed to equip clinicians, coding professionals, and policy analysts with concise context on clinical application, billing implications, and areas where payer policy differences commonly arise. Data not available in the input: specific associated taxonomies, ICD-10 diagnoses, and payer-specific reimbursement rates.