$410.56
Both report esophageal impedance testing; 91037 is for one hour or less, while 91038 is for a recording longer than one hour.
On this page
CMS RVU26D · Effective 2026-10-01
91037 Esophageal impedance Medicare reimbursement rates in Ohio
Reports a short-duration esophageal impedance study used to assess bolus movement and reflux, including nonacid reflux, with interpretation and a report. Compare 91037 office and facility rates across CMS payment localities in Ohio.
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 91037 in Ohio?
Ohio 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
$174.06
1 of 1 localities have a supported rate.
Payment area: Ohio
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.
Gastroenterology
About 91037: Short-duration esophageal impedance test
Reports a short-duration esophageal impedance study used to assess bolus movement and reflux, including nonacid reflux, with interpretation and a report.
This diagnostic study uses an esophageal catheter with impedance sensors to assess movement of liquid or gas through the esophagus and identify reflux events. It can help evaluate persistent reflux symptoms, including suspected nonacid reflux, or swallowing complaints when objective information about esophageal transit is needed. Gastroenterology or esophageal motility practices commonly perform the study, with trained staff placing the catheter and a qualified clinician interpreting the findings. This code is for the recording of one hour or less; the longer-duration service is reported separately under 91038.
Report the service when the documented study includes impedance measurements, analysis, interpretation, and a report. The claim may represent the global service or the professional interpretation with modifier 26 or technical portion with modifier TC. The 0-day global period includes same-day preoperative and postoperative care. Modifier 50 is inappropriate for this service. Assistant-at-surgery payment requires documented medical necessity; co-surgeons and team surgery are not permitted.
CMS billing rules for 91037
- 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 RVU0.95 · 17%
- Practice expense (office) RVU4.59 · 82%
- Malpractice RVU0.07 · 1%
10K
Medicare services in 2024 · #1465 by national volume
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.
91037 compared with similar codes
Office rates for Ohio, from the same CMS release.
$228.36
91010 reports esophageal motility testing. Choose 91037 when the performed study uses impedance to assess bolus movement or reflux.
$187.81
91034 reports catheter-based reflux monitoring. 91037 reports an impedance study that evaluates bolus movement and reflux events.
$463.63
91035 reports wireless esophageal reflux monitoring; 91037 is the short-duration impedance study.
Compare 91037 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
Ohio →
Office / nonfacility
$174.06
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 91037 in Ohio.
PPRRVU2026_Oct_nonQPP.csv
11,609
- Code
- 91037
- Physician work
- 0.95
- Practice expense
- 4.59
- Malpractice
- 0.07
GPCI2026.csv
85
- Locality
- Ohio
- Physician work
- 1.000
- Practice expense
- 0.913
- Malpractice
- 1.008
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 0.95 | × 1.000 | 0.9500 |
| Practice expense | 4.59 | × 0.913 | 4.1907 |
| Malpractice | 0.07 | × 1.008 | 0.0706 |
| Total RVUs | 5.2112 | ||
| Conversion factor | × 33.4009 | ||
Office / nonfacility rate, Ohio$174.06
Explore RVUs, geographic factors and the full formula
Office / nonfacility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 0.95 | 1 |
| Practice expense | 4.59 | 0.913 |
| Malpractice | 0.07 | 1.008 |
(0.95 × 1 + 4.59 × 0.913 + 0.07 × 1.008) × $33.4009 = $174.06
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.
91037 billing questions
How is 91037 distinguished from 91038?
Use 91037 for an impedance recording of one hour or less. Use 91038 when the recording exceeds one hour.
Can the interpretation and equipment portions be billed separately?
Yes. Modifier 26 identifies the professional interpretation, and modifier TC identifies the technical service; billing without either modifier represents the global service.
Is this the same test as esophageal manometry?
No. Impedance evaluates movement of liquid or gas and reflux events, while 91010 reports an esophageal motility study. Select the code that matches the study actually performed and documented.
Can modifier 50 be used?
No. Bilateral adjustment is inappropriate for this service.
What documentation supports reporting 91037?
Document the impedance study, its recording duration, measurements, analysis, interpretation, and report. The record should support a duration of one hour or less.
Are surgical team modifiers payable with this code?
Co-surgeon and team-surgery billing are not permitted. Assistant-at-surgery payment requires documentation of medical necessity.
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.
11,60691035,,G-esoph reflx tst w/electrod,A,,1.55,13.34,,13.34,NA,0.15,15.04,15.04,1,000,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
11,60791035,26,G-esoph reflx tst w/electrod,A,,1.55,0.87,,0.87,,0.13,2.55,2.55,1,000,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
11,60891035,TC,G-esoph reflx tst w/electrod,A,,0.00,12.47,,12.47,NA,0.02,12.49,12.49,1,000,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,02,0,99,0.00,0.00,0.00
11,60991037,,Esoph imped function test,A,,0.95,4.59,,4.59,NA,0.07,5.61,5.61,1,000,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
11,61091037,26,Esoph imped function test,A,,0.95,0.54,,0.54,,0.05,1.54,1.54,1,000,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
11,61191037,TC,Esoph imped function test,A,,0.00,4.05,,4.05,NA,0.02,4.07,4.07,1,000,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,02,0,99,0.00,0.00,0.00
11,61291038,,Esoph imped funct test > 1hr,A,,1.10,12.17,,12.17,NA,0.08,13.35,13.35,1,000,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
8213282,NY,99,REST OF NEW YORK,1.000,0.950,0.703
8311502,NC,00,NORTH CAROLINA,1.000,0.933,0.639
8403302,ND,01,NORTH DAKOTA**,1.000,1.000,0.406
8515202,OH,00,OHIO,1.000,0.913,1.008
8604312,OK,00,OKLAHOMA,1.000,0.893,0.777
8702302,OR,01,PORTLAND,1.016,1.111,0.744
8802302,OR,99,REST OF OREGON,1.000,0.996,0.703