HCPCS G9157: Cardiac monitoringMedicare rate & RVUs in Guam
Reports the physician’s interpretation of transesophageal Doppler cardiac monitoring used to assess hemodynamic flow during a monitored clinical episode.
CMS doesn’t publish an office rate for G9157 in Guam.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
On this page 9 sections
What G9157 covers
Transesophageal Doppler monitoring uses an esophageal probe to obtain blood-flow information that helps assess cardiac output and hemodynamic response. G9157 represents the physician’s interpretation and report, rather than probe placement or the technical work of acquiring the monitoring data. It may be performed in settings such as an operating room or intensive care unit when clinicians are monitoring a patient’s hemodynamics. The interpreting professional reviews the acquired data and documents the findings in a report.
Report G9157 for the professional interpretation and report when this monitoring service is performed. The record should identify the monitoring service and include the interpretation and resulting report. CMS identifies G9157 as professional-component-only; the technical portion is covered by a separate code. Do not treat G9157 as the complete technical and professional service or report it as a diagnostic TEE solely because an esophageal probe is used. Distinguish hemodynamic monitoring from an examination performed to evaluate cardiac structures or function.
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.
G9157 in Hawaii, Guam
| Payment locality | Office | Facility |
|---|---|---|
| Hawaii, Guam | Unavailable | $87.45 |
How the G9157 rate is calculated
Each of G9157’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 · G9157
RVUs × geographic indexes × conversion factor
Work2.15
2.15 RVUs× 1.000 GPCI
Practice expense0.32
0.32 RVUs× 1.000 GPCI
Malpractice0.18
0.18 RVUs× 1.000 GPCI
Adjusted RVUs
2.6500
Conversion factor
$33.4009
Medicare rate
$88.51
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for G9157
The CMS indicators that decide how G9157 is paid alongside other services.
CMS payment indicators · G9157
Cardiac monitoring
| Rule | CMS value | What it means |
|---|---|---|
| Global period | XXX | The global surgery concept doesn’t apply. |
| Multiple procedures | 9 | The concept doesn’t apply. |
| Bilateral (modifier 50) | 9 | The concept doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 9 | The concept doesn’t apply. |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 2 | Professional component only. |
G9157 compared with similar codes
Compare codes · National
G9157 vs 93318 vs 93312: Medicare rates
How to choose
- 93318Echo transesophageal intraop
- 93318 describes TEE performed for monitoring. G9157 specifically represents the professional interpretation and report for transesophageal Doppler cardiac monitoring.
- 93312Transesophageal echo
- 93312 is for diagnostic TEE, not hemodynamic monitoring. Choose based on the service’s purpose and the work performed.
G9157 billing questions
Does G9157 include probe placement and data acquisition?
No. G9157 represents the professional interpretation and report; a separate code covers the technical portion.
Is G9157 for diagnostic transesophageal echocardiography?
It describes interpretation of transesophageal Doppler cardiac monitoring. A diagnostic TEE is selected when the service evaluates cardiac structures or function rather than monitoring hemodynamic flow.
Should modifier 26 be appended?
G9157 is identified as a professional-component-only code, so it already represents the interpretation and report rather than the global service.
What documentation supports reporting G9157?
Document the monitoring service, the physician’s interpretation of the acquired data, and the resulting report.
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
Show the CMS file lines behind this rate
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