CPT code 93898 describes an add-on diagnostic Doppler ultrasound procedure that uses an injected microbubble contrast agent to detect venous–arterial shunts within the intracranial circulation. As an adjunct to a complete intracranial arterial Doppler study, the service enhances detection of abnormal vascular connections that can have clinical implications for stroke evaluation, paradoxical embolism assessment, and other neurovascular workups. Nationally, this code matters for providers who perform advanced neurovascular ultrasound and for payers overseeing imaging utilization and prior authorization policies.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the clinical context for using microbubble-enhanced intracranial Doppler, coding and billing considerations for an add-on service, payer coverage patterns, and typical sites of service. The publication summarizes benchmarks where available, highlights relevant policy and coverage update themes, and outlines factors that influence utilization and documentation needs for accurate claims submission.

This briefing is written for a national audience of clinicians, coding professionals, and policy analysts seeking a concise reference on CPT code 93898 and its role in neurovascular diagnostic pathways.