Billing code 91133: ElectrogastrographyMedicare rate & RVUs in Nevada
Electrogastrography with testing records gastric electrical activity during a challenge, helping evaluate abnormal stomach rhythms in patients with persistent upper gastrointestinal symptoms.
Medicare pays $508.68 for 91133 in the office in Nevada (Nevada**). Which amount applies depends on the service address.
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 91133 covers
Electrogastrography with testing records electrical signals from the stomach before and during or after a challenge, commonly a meal, to assess gastric slow-wave patterns and their response. Gastroenterology practices may use it when persistent nausea, vomiting, or suspected gastric dysrhythmia prompts evaluation of gastric electrical function. Surface electrodes capture the signals, which are interpreted in relation to the test protocol.
Report 91133 when the electrogastrography includes a test or challenge; the recording without that test is represented by 91132. Documentation should identify the clinical indication, challenge performed, recording conditions, and interpretation of the resulting gastric electrical activity. CMS recognizes a professional portion for interpretation, reported with modifier 26, and a technical portion for equipment and staff, reported with modifier TC. Billing without either modifier represents the global 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.
91133 in Nevada**
| Payment locality | Office | Facility |
|---|---|---|
| Nevada** | $508.68 | Unavailable |
How the 91133 rate is calculated
Each of 91133’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 · 91133
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 0.64Practice expense 14.55Malpractice 0.03
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 91133
The CMS indicators that decide how 91133 is paid alongside other services.
CMS payment indicators · 91133
Electrogastrography
| Rule | CMS value | What it means |
|---|---|---|
| Global period | XXX | The global surgery concept doesn’t apply. |
| Multiple procedures | 0 | No multiple-procedure reduction. |
| 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
91133 without 26 · national office
$508.36
Electrogastrography
91133-26 · Professional component
$34.40
Pays only the interpretation and report.
91133 compared with similar codes
Compare codes
91133 vs 91132 vs 91112 vs 78264: national Medicare rates
Swap in your local Medicare rate.
How to choose
- 91132Electrogastrography
- Choose 91133 when the electrogastrography includes a test or challenge. Choose 91132 for the recording without that test component.
- 91112Motility capsule
- 91133 measures gastric electrical activity during a test. 91112 measures gastrointestinal transit and pressure using a wireless capsule.
- 78264Gastric emptying
- 78264 evaluates gastric emptying with scintigraphic imaging. 91133 records gastric electrical activity during a challenge.
91133 billing questions
How does 91133 differ from 91132?
91133 includes electrogastrography with a test or challenge, commonly a meal challenge. 91132 represents electrogastrography without that test component.
Can the professional and technical portions be billed separately?
Yes. Modifier 26 identifies the professional interpretation, and modifier TC identifies the technical portion involving equipment and staff. Without either modifier, the claim represents the global service.
What documentation supports reporting 91133?
Record the reason for testing, the challenge performed, the recording conditions, and the interpretation of the gastric electrical findings.
Is a meal challenge required for 91133?
The service includes a test or challenge; a meal is a common example. The documentation should identify the test actually performed.
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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