$245.05
Choose 91030 for an acid perfusion challenge intended to reproduce symptoms. Choose 91010 when the service measures esophageal motility.
On this page
CMS RVU26D · Effective 2026-10-01
91030 Acid challenge Medicare reimbursement rates in Wyoming
Reports a provocative esophageal acid challenge used to assess whether acid exposure reproduces a patient’s characteristic esophageal or chest symptoms. Compare 91030 office and facility rates across CMS payment localities in Wyoming.
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 91030 in Wyoming?
Wyoming has 1 payment locality in this comparison. Use the service location to choose the applicable amount. These are the supported base rates for the payment area shown below, using the same CMS release.
Office / nonfacility
$162.23
1 of 1 localities have a supported rate.
Payment area: Wyoming**
One mapped payment locality.
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.
Esophageal function testing
About 91030: Esophageal acid perfusion challenge
Reports a provocative esophageal acid challenge used to assess whether acid exposure reproduces a patient’s characteristic esophageal or chest symptoms.
This test introduces acid into the esophagus through a catheter while the clinician observes whether the patient’s characteristic symptoms are reproduced. It may be used in evaluating noncardiac chest pain or suspected acid-related esophageal symptoms. A gastroenterologist or another clinician experienced in esophageal testing typically performs the procedure; trained staff may assist with the test, and a physician interprets the findings.
Report 91030 when the service is an esophageal acid perfusion challenge, rather than pressure measurement or monitoring of naturally occurring reflux. Documentation should support the clinical indication, the acid challenge performed, the patient’s symptom response, and the interpretation. The code has a 0-day global period, so same-day preoperative and postoperative care is included. Bill the global service without a component modifier, or report modifier 26 for interpretation or TC for equipment and staff. Modifier 50 is inappropriate for this single-organ test. Assistant-at-surgery payment requires documented medical necessity; co-surgeons and team surgery are not permitted.
CMS billing rules for 91030
- Global period
- Minor procedure with a 0-day global period: same-day preoperative and postoperative care is included.
- 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.
- Bilateral procedures
- Bilateral adjustment does not apply; the descriptor or anatomy makes modifier 50 inappropriate.
- Assistant at surgery
- Assistant at surgery is paid only with documentation of medical necessity.
- Co-surgeons
- Co-surgeons not permitted.
- Team surgery
- Team surgery not permitted.
Where the value comes from
- Work RVU0.89 · 18%
- Practice expense (office) RVU3.93 · 81%
- Malpractice RVU0.05 · 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.
91030 compared with similar codes
Office rates for Wyoming, from the same CMS release.
$201.71
91030 provokes a response by introducing acid. 91034 monitors esophageal pH over time to assess naturally occurring acid exposure.
$501.05
91030 is an acid challenge; 91035 uses a wireless capsule to monitor esophageal pH over time.
Compare 91030 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.
1 of 1 payment localities
Wyoming** →
Office / nonfacility
$162.23
Facility
Unavailable
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How this local rate is calculated
Each RVU component is multiplied by its own geographic practice cost index (GPCI). The three adjusted components are added, then multiplied by the conversion factor. These are the inputs used for 91030 in Wyoming**.
PPRRVU2026_Oct_nonQPP.csv
11,600
- Code
- 91030
- Physician work
- 0.89
- Practice expense
- 3.93
- Malpractice
- 0.05
GPCI2026.csv
112
- Locality
- Wyoming**
- Physician work
- 1.000
- Practice expense
- 1.000
- Malpractice
- 0.740
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 0.89 | × 1.000 | 0.8900 |
| Practice expense | 3.93 | × 1.000 | 3.9300 |
| Malpractice | 0.05 | × 0.740 | 0.0370 |
| Total RVUs | 4.8570 | ||
| Conversion factor | × 33.4009 | ||
Office / nonfacility rate, Wyoming**$162.23
Explore RVUs, geographic factors and the full formula
Office / nonfacility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 0.89 | 1 |
| Practice expense | 3.93 | 1 |
| Malpractice | 0.05 | 0.74 |
(0.89 × 1 + 3.93 × 1 + 0.05 × 0.74) × $33.4009 = $162.23
The office and facility calculations use their respective practice-expense RVUs. The facility amount here is the physician fee, not a separate hospital or facility bill.
91030 billing questions
How is 91030 different from esophageal motility testing?
91030 evaluates whether acid perfusion reproduces symptoms. Motility testing, such as 91010, evaluates esophageal pressure and movement.
Can the professional and technical portions be billed separately?
Yes. Report modifier 26 for the interpretation or TC for the technical service; billing without either modifier represents the global service.
Is modifier 50 appropriate?
No. The esophagus is tested as one organ, so bilateral reporting is inappropriate.
What documentation supports reporting 91030?
Document the reason for testing, the acid perfusion challenge performed, the patient’s response, and the interpretation.
What is included in the global service?
The 0-day global period includes same-day preoperative and postoperative care.
Can an assistant or another surgeon be reported?
Assistant-at-surgery payment requires documentation of medical necessity. Co-surgeons and team surgery are not permitted.
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.
11,59791022,,Duodenal motility study,A,,1.40,4.34,,4.34,NA,0.07,5.81,5.81,1,000,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
11,59891022,26,Duodenal motility study,A,,1.40,0.83,,0.83,,0.05,2.28,2.28,1,000,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
11,59991022,TC,Duodenal motility study,A,,0.00,3.51,,3.51,NA,0.02,3.53,3.53,1,000,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,02,0,99,0.00,0.00,0.00
11,60091030,,Acid perfusion of esophagus,A,,0.89,3.93,,3.93,NA,0.05,4.87,4.87,1,000,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
11,60191030,26,Acid perfusion of esophagus,A,,0.89,0.52,,0.52,,0.03,1.44,1.44,1,000,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
11,60291030,TC,Acid perfusion of esophagus,A,,0.00,3.41,,3.41,NA,0.02,3.43,3.43,1,000,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,02,0,99,0.00,0.00,0.00
11,60391034,,Gastroesophageal reflux test,A,,0.95,5.03,,5.03,NA,0.08,6.06,6.06,1,000,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
10902402,WA,99,REST OF WASHINGTON,1.013,1.053,0.761
11011402,WV,16,WEST VIRGINIA,1.000,0.869,1.431
11106302,WI,00,WISCONSIN,1.000,0.958,0.308
11203602,WY,21,WYOMING**,1.000,1.000,0.740
113"MAC Assignments as of November 22, 2023",,,,,,
114,,,,,,
115*Work GPCI reflects a 1.5 floor in Alaska established by the MIPPA.,,,,,,