93892
No office rateTcd emboli detect w/o inj
93892 reports the primary emboli-detection service without intravenous microbubble injection; 93897 represents each additional 30 minutes and must accompany the primary service.
On this page
CMS RVU26D · Effective 2026-10-01
93897 Emboli monitoring Medicare reimbursement rates in Oregon
Reports each additional 30 minutes of transcranial Doppler emboli detection without intravenous microbubble injection, beyond the primary monitoring service. Compare 93897 office and facility rates across CMS payment localities in Oregon.
Amounts below use the non-QP conversion factor for participating physicians. These are base physician payments before claim-level adjustments, not patient costs or total hospital charges.
What does Medicare pay for 93897 in Oregon?
Oregon has 2 payment localities in this comparison. Use the service location to choose the applicable amount. These are the supported base rates for the 2 payment areas shown below, using the same CMS release.
Office / nonfacility
$235.84–$260.61
2 of 2 localities have a supported rate.
Facility setting
No supported rate
These are locality ranges, not averages or address-specific quotes. A facility-setting amount covers the physician service; it does not include a hospital’s separate bill. Choose a locality below to inspect its calculation, compare other payment areas, or price a percentage of Medicare.
Vascular ultrasound
About 93897: Additional transcranial emboli monitoring
Reports each additional 30 minutes of transcranial Doppler emboli detection without intravenous microbubble injection, beyond the primary monitoring service.
This add-on represents another 30 minutes of transcranial Doppler monitoring for embolic signals in the intracranial arteries, without intravenous microbubble injection. A vascular sonographer typically acquires the Doppler data in a vascular laboratory or hospital setting; a physician with appropriate expertise interprets the diagnostic study. The additional interval may extend monitoring when emboli surveillance requires more time than the primary service covers.
Report 93897 only with the primary emboli-detection service, 93892, and document the additional monitoring time and the study findings. It is not a stand-alone report for the initial monitoring service. CMS treats it as an add-on paid within the primary procedure’s global period. The diagnostic test has professional and technical components: append modifier 26 for the interpretation or TC for equipment and staff; without either modifier, the claim represents the global service.
CMS billing rules for 93897
- Global period
- Add-on code: billed only together with a primary procedure and paid within that procedure's global period.
- Professional and technical components
- Diagnostic test with a professional component (modifier 26, interpretation) and a technical component (modifier TC, equipment and staff); billing without a modifier is the global service.
Where the value comes from
- Work RVU0.71 · 10%
- Practice expense (office) RVU6.32 · 89%
- Malpractice RVU0.08 · 1%
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.
93897 compared with similar codes
Office rates for Oregon, from the same CMS release.
93893
No office rateTcd std icr art ven-art shnt
93893 is for emboli detection with intravenous microbubble injection. Choose 93897 only for additional monitoring time without that injection.
$260.81–$288.06
93898 evaluates for a venous-to-arterial shunt using microbubble injection; 93897 extends non-injection emboli monitoring.
$268.04–$295.94
93886 reports a complete intracranial transcranial Doppler study, while 93897 adds time to the primary emboli-detection service.
Compare 93897 by payment locality
Find the payment area for your service address, then open its rate page for calculation inputs, release history and the percentage-of-Medicare tool. A city may cross payment-area boundaries; the ZIP lookup above helps resolve the location.
2 of 2 payment localities
Portland →
Office / nonfacility
$260.61
Facility
Unavailable
Rest Of Oregon →
Office / nonfacility
$235.84
Facility
Unavailable
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93897 billing questions
When should 93897 be reported instead of 93892?
Use 93892 for the primary emboli-detection service without intravenous microbubble injection. Report 93897 for each additional 30 minutes of monitoring, with 93892.
Can 93897 be billed by itself?
No. It is an add-on code and must be reported with its primary emboli-detection service, 93892.
Which modifiers identify the professional and technical services?
Modifier 26 identifies the professional interpretation, and modifier TC identifies the technical service. Without either modifier, the claim represents the global service.
What documentation supports an additional unit?
Document the total monitoring time, including the additional interval, and the findings from the transcranial Doppler emboli-detection study.
How does 93897 differ from 93893?
93897 adds monitoring time without intravenous microbubble injection. 93893 describes emboli detection with microbubble injection, rather than additional time for the non-injection 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 indices and the applicable conversion factor. Unavailable or separately priced services are labeled rather than assigned a made-up amount.
Source: RVU26D. Effective 2026-10-01 through the day before 2027-01-01.
12,29693896,,Vsrctv std tcd icr art compl,A,,0.79,4.74,,4.74,NA,0.08,5.61,5.61,1,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
12,29793896,26,Vsrctv std tcd icr art compl,A,,0.79,0.38,,0.38,,0.06,1.23,1.23,1,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
12,29893896,TC,Vsrctv std tcd icr art compl,A,,0.00,4.36,,4.36,NA,0.02,4.38,4.38,1,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,01,0,99,0.00,0.00,0.00
12,29993897,,Emboli detcj wo iv mbubb njx,A,,0.71,6.32,,6.32,NA,0.08,7.11,7.11,1,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
12,30093897,26,Emboli detcj wo iv mbubb njx,A,,0.71,0.36,,0.36,,0.05,1.12,1.12,1,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
12,30193897,TC,Emboli detcj wo iv mbubb njx,A,,0.00,5.96,,5.96,NA,0.03,5.99,5.99,1,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,01,0,99,0.00,0.00,0.00
12,30293898,,Ven-artl shunt det mbubb njx,A,,0.83,6.95,,6.95,NA,0.08,7.86,7.86,1,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00