CPT code 61641 captures the performance of additional intracranial angioplasty and balloon dilatation on a second vessel in the same vascular territory after initial balloon dilatation for vasospasm. This code documents a multivessel endovascular intervention specifically addressing intracranial vasospasm, an acute vascular complication often encountered after subarachnoid hemorrhage or other cerebrovascular events. Accurate coding for this service is important for tracking utilization of advanced neurointerventional therapies and for national billing consistency.

Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for CPT code 61641, typical sites where the service is delivered, and what to expect in benchmarking and policy discussions. The publication outlines how the code differs from single-vessel angioplasty codes, highlights payer coverage considerations at a national level, and summarizes common modifiers and service-line associations where available.

This piece provides clinicians, billing professionals, and policy readers with context on coding intent, clinical circumstances that prompt multivessel intracranial angioplasty, and the types of documentation and service settings that typically accompany the procedure. Data not available in the input will be noted where applicable.