CPT code 61889 covers implantation of a cranial neurostimulator pulse generator or receiver placed under the scalp and connected to intracranial or cortical electrode arrays. This neurosurgical implant procedure has growing clinical importance for treating refractory neurological conditions where brain stimulation is indicated, including select movement disorders, epilepsy, and investigational neuromodulation therapies. Nationally, accurate coding for this complex implant influences facility and physician billing, device tracking, and post-market surveillance.

Key payers included in the analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context and typical sites of service, a summary of common billing modifiers associated with complex neurosurgical procedures, and pointers to related procedural and device coding considerations. The publication also outlines benchmark topics and policy-relevant issues that affect coverage and reimbursement for cranial neurostimulator implantation, and it highlights areas where coding clarity and documentation are often required.

This executive summary prepares clinicians, coding professionals, and policy analysts to understand the procedural meaning of CPT code 61889, the payer landscape typically involved in claims, and the types of benchmarks and policy updates that commonly affect this category of neurosurgical implant services.