HCPCS code G0453: Intraoperative monitoring, outside-OR, per 15 minutes2026 Medicare rate & RVUs in Missouri
Reports continuous neurophysiologic monitoring during surgery when the monitoring professional observes the patient from outside the operating room, including a remote location.
CMS doesn’t publish an office rate for G0453 in Missouri.
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 G0453 covers
G0453 covers real-time neurophysiologic monitoring during an operation when the monitoring professional is outside the operating room, such as at a remote workstation. The professional observes patient-specific signals during surgery and communicates clinically significant changes to the operating team. It is used for procedures in which ongoing monitoring can help the surgical team identify changes in neural function, including some spine and brain operations.
Report the service by patient and in 15-minute units, based on the time spent providing continuous monitoring. The record should identify the operation, monitoring professional, signals followed, monitoring start and stop times, significant signal changes, and communications with the surgical team. CMS assigns work, practice-expense, and malpractice relative value units to the service.
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 G0453 pays more and less in Missouri
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
| Payment locality | Office | Facility |
|---|---|---|
| Metropolitan Kansas City, MO | Unavailable | $27.00 |
| Metropolitan St. Louis, MO | Unavailable | $27.12 |
| Rest of Missouri | Unavailable | $26.56 |
How the G0453 rate is calculated
Each of G0453’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 · G0453
RVUs × geographic indexes × conversion factor
Work0.60
0.60 RVUs× 1.000 GPCI
Practice expense0.17
0.17 RVUs× 1.000 GPCI
Malpractice0.05
0.05 RVUs× 1.000 GPCI
Adjusted RVUs
0.8200
Conversion factor
$33.4009
Medicare rate
$27.39
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for G0453
G0453 has no global surgery period, no multiple-procedure, bilateral or assistant-at-surgery adjustment, and no professional/technical split. What changes the payment is where the service happens: the place of service on the claim decides whether Medicare pays the office or the facility rate.
Place of service · G0453
Which rate does Medicare pay?
The POS code on the claim line (CMS-1500 box 24B).
POS 11 · non-facility rate · national
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G0453 isn’t priced in this setting.
G0453 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 95940Intraoperative monitoringOne-on-one, in operating room
- Use G0453 when continuous monitoring is performed outside the operating room; 95940 describes monitoring performed in the operating room.
- 95941Remote IONMHourly or multiple-patient
- Both describe continuous monitoring from outside the operating room. G0453 is reported in 15-minute units, while 95941 uses an hourly unit.
- 95938Sensory evoked potentialsUpper and lower limbs
- 95938 reports somatosensory evoked-potential testing; G0453 reports ongoing neurophysiologic monitoring during the operation.
G0453 billing questions
When should G0453 be chosen instead of 95940?
G0453 is for continuous monitoring performed from outside the operating room, including remotely. Code 95940 describes monitoring performed in the operating room.
How are units counted?
The code is reported per patient in 15-minute units. Document the monitoring interval with start and stop times.
What documentation supports G0453?
Document the surgical procedure, the signals monitored, the monitoring professional and monitoring times. Record important signal changes and communications to the operating team.
Is G0453 the same as an evoked-potential test?
No. G0453 represents continuous monitoring during surgery; codes such as 95938 identify specific evoked-potential testing.
How does G0453 differ from 95941?
Both concern continuous monitoring from outside the operating room, but G0453 is reported per 15 minutes and 95941 uses an hourly unit.
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.
CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027
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