CPT code 93892: Emboli detection, without injection2026 Medicare rate & RVUs in Maine
Transcranial Doppler monitoring detects embolic signals in intracranial arteries without injection of an intravenous microbubble agent.
CMS doesn’t publish an office rate for 93892 in Maine.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
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On this page 9 sections
What 93892 covers
This study uses transcranial Doppler ultrasound to monitor intracranial arteries for embolic signals without an intravenous microbubble injection. A physician or other qualified clinician may order it when emboli monitoring is needed, such as during evaluation of cerebrovascular disease. The service may be performed in an office, hospital, or other setting with the equipment and staff needed for Doppler monitoring; the interpreting clinician reviews the recorded findings and reports the results.
Report 93892 for the no-injection emboli-detection service, not for a routine complete or limited intracranial flow study. Documentation should identify the clinical reason for monitoring, the vessels assessed, and the findings and interpretation. CMS recognizes professional and technical components: report modifier 26 for interpretation, TC for equipment and staff, or neither modifier for the global service. The cardiovascular diagnostic multiple-procedure reduction applies to the technical component when applicable.
This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.
Where 93892 pays more and less in Maine
| Payment locality | Office | Facility |
|---|---|---|
| Rest of Maine | Unavailable | Unavailable |
| Southern Maine, ME | Unavailable | Unavailable |
How the 93892 rate is calculated
Each of 93892’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.
How the rate is built · 93892
RVUs × geographic indexes × conversion factor
Work1.12
1.12 RVUs× 1.000 GPCI
Practice expense7.94
7.94 RVUs× 1.000 GPCI
Malpractice0.11
0.11 RVUs× 1.000 GPCI
Adjusted RVUs
9.1700
Conversion factor
$33.4009
Medicare rate
$306.29
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 93892
The CMS indicators that decide how 93892 is paid alongside other services.
CMS payment indicators · 93892
Emboli detection, without injection
| Rule | CMS value | What it means |
|---|---|---|
| Global period | XXX | The global surgery concept doesn’t apply. |
| Multiple procedures | 6 | Diagnostic cardiovascular reduction applies to the technical component. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 0 | Not paid without supporting documentation. |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 1 | Diagnostic test with separate professional (26) and technical (TC) components. |
What modifiers do to the payment
Modifier 26 · payment effect
With and without the modifier
93892 without 26 · national office
$306.29
Emboli detection, without injection
93892-26 · Professional component
$58.45
Pays only the interpretation and report.
93892 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 93886Intracranial DopplerComplete study
- Choose 93886 for a complete intracranial Doppler flow study. Choose 93892 when the service monitors intracranial arteries for embolic signals without injection.
- 93888Transcranial DopplerLimited intracranial study
- 93888 describes a limited intracranial Doppler study; 93892 describes emboli detection without an intravenous microbubble injection.
- 93898Shunt detectionIV microbubble injection
- 93898 is associated with venous-arterial shunt detection using microbubble injection. 93892 is no-injection emboli monitoring, not a shunt assessment.
93892 billing questions
How does 93892 differ from a complete intracranial Doppler study?
93892 is for monitoring intracranial arteries for embolic signals without an intravenous microbubble injection. A complete intracranial study assesses flow in the vessels rather than embolic signals.
Which modifier identifies the interpretation?
Use modifier 26 for the professional component, which represents interpretation. Use TC for the technical component; billing without either modifier represents the global service.
Does the multiple-procedure reduction affect both components?
CMS applies the cardiovascular diagnostic multiple-procedure reduction to the technical component.
What should the report document?
Document the reason for emboli monitoring, the intracranial vessels assessed, and the recorded findings and interpretation.
Can 93892 be reported for a microbubble shunt study?
No. 93892 describes emboli detection without an intravenous microbubble injection; a study intended to assess a venous-arterial shunt is a different TCD service.
Where these rates come from
FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.
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