93893
No office rateTcd std icr art ven-art shnt
93893 is the primary procedure for the transcranial Doppler shunt study; 93898 is reported with it for shunt detection using intravenous microbubble injection.
On this page
CMS RVU26D · Effective 2026-10-01
93898 Shunt detection Medicare reimbursement rates in Missouri
Reports transcranial Doppler detection of a venous-to-arterial shunt using intravenous microbubble contrast, typically during evaluation for a right-to-left shunt. Compare 93898 office and facility rates across CMS payment localities in Missouri.
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 93898 in Missouri?
Missouri has 3 payment localities in this comparison. Use the service location to choose the applicable amount. These are the supported base rates for the 3 payment areas shown below, using the same CMS release.
Office / nonfacility
$230.43–$251.39
3 of 3 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.
Where 93898 pays more and less in Missouri
3 payment localities
$230.43 to $251.39
Neurovascular ultrasound
About 93898: Transcranial Doppler shunt detection with bubbles
Reports transcranial Doppler detection of a venous-to-arterial shunt using intravenous microbubble contrast, typically during evaluation for a right-to-left shunt.
This service uses transcranial Doppler monitoring to look for microbubbles passing from the venous circulation into the cerebral arteries, indicating a right-to-left shunt. It may be part of an evaluation for a suspected shunt, including in a patient with an otherwise unexplained stroke or suspected paradoxical embolism. A vascular or neurovascular ultrasound team performs the monitoring, and a qualified clinician interprets the findings.
Report 93898 only as an add-on with 93893; it is not a standalone service. Documentation should support the shunt evaluation and record the intravenous microbubble administration, Doppler monitoring, and interpretation. CMS identifies separately priced professional and technical components: modifier 26 represents the interpretation, modifier TC represents the equipment and staff, and billing without either modifier represents the global service. Payment for this add-on is within the primary procedure’s global period.
CMS billing rules for 93898
- 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 RVU0.83 · 11%
- Practice expense (office) RVU6.95 · 88%
- 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.
93898 compared with similar codes
Office rates for Missouri, from the same CMS release.
93892
No office rateTcd emboli detect w/o inj
93892 concerns emboli detection without intravenous microbubble injection. Use 93898 with its primary procedure when the service is venous-to-arterial shunt detection.
$237.03–$258.49
93886 represents a complete intracranial Doppler study, not the microbubble shunt-detection add-on reported with 93893.
93888
No office rateIntracranial limited study
93888 represents a limited intracranial Doppler study; 93898 is for microbubble shunt detection and requires its primary procedure.
Compare 93898 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.
3 of 3 payment localities
Metropolitan Kansas City →
Office / nonfacility
$248.31
Facility
Unavailable
Metropolitan St. Louis →
Office / nonfacility
$251.39
Facility
Unavailable
Rest Of Missouri →
Office / nonfacility
$230.43
Facility
Unavailable
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93898 billing questions
Can 93898 be reported by itself?
No. It is an add-on code and must be reported with the primary procedure, 93893.
How is 93898 different from 93893?
93893 is the primary transcranial Doppler shunt study. Report 93898 with it for the shunt-detection service involving intravenous microbubble injection.
Which modifiers identify the professional and technical components?
Use modifier 26 for the professional interpretation and modifier TC for the technical service. Without either modifier, the claim represents the global service.
What documentation supports reporting 93898?
Document the clinical reason for shunt evaluation, the intravenous microbubble administration, transcranial Doppler monitoring, and the interpreted findings.
Is payment for 93898 separate from the primary procedure’s global period?
No. CMS treats this add-on payment as falling within the primary procedure’s global period.
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.
12,29993897,,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
12,30393898,26,Ven-artl shunt det mbubb njx,A,,0.83,0.43,,0.43,,0.06,1.32,1.32,1,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
12,30493898,TC,Ven-artl shunt det mbubb njx,A,,0.00,6.52,,6.52,NA,0.02,6.54,6.54,1,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,01,0,99,0.00,0.00,0.00
12,30593922,,Upr/l xtremity art 2 levels,A,,0.24,2.20,,2.20,NA,0.05,2.49,2.49,1,XXX,0.00,0.00,0.00,6,2,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00