CPT code 64510 identifies a stellate (cervicothoracic) ganglion block, an interventional pain procedure that blocks sympathetic nerves supplying the upper extremities, head, neck, and portions of the chest. Clinically important for treating type I complex regional pain syndrome (reflex sympathetic dystrophy) and other sympathetically mediated pain, this code is widely used in outpatient interventional pain management and peri-procedural pain services nationwide. The code matters because it affects coverage policy, utilization oversight, and payment for an evidence-sensitive procedure delivered across ambulatory surgery centers, hospital outpatient departments, and pain clinics.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise review of clinical indications and the typical service setting, an overview of payer coverage considerations and common modifiers used with the code, and pointers to related billing and documentation issues. The publication also summarizes relevant benchmarking topics and policy trends that influence authorization and reimbursement for interventional sympathetic nerve blocks.

This summary provides clinicians, billing professionals, and policy analysts with the clinical context and administrative framing needed to understand how CPT code 64510 is used and governed across major payers at a national level.