Summary & Overview
CPT 93892: Transcranial Doppler Ultrasound Without Contrast to Detect Emboli
CPT code 93892 denotes a transcranial Doppler ultrasound study performed without microbubble contrast to evaluate intracranial arterial blood flow and detect embolic signals. This diagnostic vascular ultrasound is used in neurologic and vascular evaluations where noninvasive assessment of cerebral hemodynamics and emboli surveillance is needed. Nationally, the code matters for stroke workups, cerebrovascular disease monitoring, and peri-procedural emboli surveillance because it supports clinical decision-making without invasive angiography.
Key payers included in the analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The content outlines payer coverage patterns, typical sites of service, and clinical contexts where TCD without contrast is applied. Readers will find a concise clinical description, the expected service type and typical settings, and reference points for billing and documentation considerations.
The publication provides benchmarks and policy-relevant context for CPT code 93892, including utilization drivers, common clinical indications, and where practice patterns intersect with payer policy. Data not available in the input for specific reimbursement rates, ICD-10 pairings, or associated taxonomies is noted as unavailable; the focus remains on the code’s clinical role and the payer landscape affecting national adoption and coverage.
Billing Code Overview
CPT code 93892 describes a transcranial Doppler ultrasound (TCD) study without contrast performed to evaluate blood flow dynamics and detect emboli within the intracranial arteries. The procedure uses Doppler ultrasound to assess the speed and direction of blood flow through cerebral arteries and specifically seeks intravascular embolic signals without the use of injected microbubble contrast.
Service type: Diagnostic vascular ultrasound — transcranial Doppler (non-contrast)
Typical site of service: Hospital outpatient department, specialized vascular laboratory, or outpatient imaging center
Clinical & Coding Specifications
Clinical Context
A 68-year-old male presents to the vascular laboratory from the emergency department after transient right-sided weakness and aphasia that resolved within one hour. Neurology requests a transcranial Doppler (TCD) ultrasound to evaluate intracranial arterial blood flow velocity and search for microembolic signals that might indicate an ongoing embolic source. The vascular technologist performs a non-contrast Doppler study of the intracranial arteries through temporal and suboccipital windows while the interpreting physician documents indications, waveform interpretation, insonation depths, mean flow velocities, and presence or absence of embolic signals. The study is typically ordered and billed by a vascular medicine specialist, neurologist, or a radiology group. Typical site of service is an outpatient vascular laboratory, hospital-based vascular lab, or inpatient neurology/ED service when stroke or TIA is suspected. Clinical workflow includes patient triage and history, sonographer acquisition of real-time Doppler recordings, immediate review of concerning findings by the on-call physician, and documentation of final interpretation in the medical record.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | When billing physician interpretation separate from technical component |
TC |