$310.11
51728 reports the complex cystometrogram with voiding pressure studies; 51797 separately identifies the intra-abdominal pressure measurement as an add-on when performed.
On this page
CMS RVU26D · Effective 2026-10-01
51797 Abdominal pressure test Medicare reimbursement rates in Iowa
Measures intra-abdominal pressure during urodynamic testing, typically alongside complex cystometrogram studies that assess bladder pressure during filling and voiding. Compare 51797 office and facility rates across CMS payment localities in Iowa.
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 51797 in Iowa?
Iowa 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
$142.81
1 of 1 localities have a supported rate.
Payment area: Iowa
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.
Urodynamic testing
About 51797: Urodynamic intra-abdominal pressure measurement
Measures intra-abdominal pressure during urodynamic testing, typically alongside complex cystometrogram studies that assess bladder pressure during filling and voiding.
This add-on captures intra-abdominal pressure during urodynamic evaluation, commonly through a rectal pressure catheter or balloon while bladder pressure is recorded. Comparing abdominal and bladder pressure helps the clinician assess detrusor pressure during filling and voiding. Urologists and other clinicians who perform urodynamic studies use it in office or facility settings for patients evaluated for urinary retention, incontinence, or other lower urinary tract symptoms.
Report 51797 only with a primary procedure, commonly 51728 or 51729, when the abdominal-pressure measurement is performed; it is not a stand-alone service. The record should identify the measurement method, include the pressure data, and support its role in the study. CMS treats payment for this add-on as within the primary procedure's global period. The service may be billed globally without a modifier or split between interpretation (modifier 26) and equipment and staff (modifier TC); CMS separately prices both component modifiers.
CMS billing rules for 51797
- Global period
- Add-on code: billed only together with a primary procedure and paid within that procedure's global period.
- 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.
Where the value comes from
- Work RVU0.78 · 17%
- Practice expense (office) RVU3.79 · 82%
- Malpractice RVU0.07 · 2%
96.4K
Medicare services in 2024 · #572 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.
51797 compared with similar codes
Office rates for Iowa, from the same CMS release.
$325.55
51729 is the primary complex cystometrogram code when leak point pressure studies are included. 51797 reports the intra-abdominal pressure measurement alongside the primary study.
$249.66
51726 reports a complex cystometrogram without the voiding pressure study focus of 51728. 51797 is an add-on measurement, not a substitute for the primary cystometrogram code.
Compare 51797 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
Iowa →
Office / nonfacility
$142.81
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 51797 in Iowa.
PPRRVU2026_Oct_nonQPP.csv
6,084
- Code
- 51797
- Physician work
- 0.78
- Practice expense
- 3.79
- Malpractice
- 0.07
GPCI2026.csv
53
- Locality
- Iowa
- Physician work
- 1.000
- Practice expense
- 0.915
- Malpractice
- 0.397
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 0.78 | × 1.000 | 0.7800 |
| Practice expense | 3.79 | × 0.915 | 3.4679 |
| Malpractice | 0.07 | × 0.397 | 0.0278 |
| Total RVUs | 4.2756 | ||
| Conversion factor | × 33.4009 | ||
Office / nonfacility rate, Iowa$142.81
Explore RVUs, geographic factors and the full formula
Office / nonfacility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 0.78 | 1 |
| Practice expense | 3.79 | 0.915 |
| Malpractice | 0.07 | 0.397 |
(0.78 × 1 + 3.79 × 0.915 + 0.07 × 0.397) × $33.4009 = $142.81
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.
51797 billing questions
Can 51797 be billed by itself?
No. It is an add-on and must be reported with a primary procedure, commonly 51728 or 51729, when intra-abdominal pressure is measured.
How does 51797 differ from 51728?
51728 reports a complex cystometrogram with voiding pressure studies. 51797 is the add-on for the intra-abdominal pressure measurement performed as part of the study.
What documentation supports 51797?
Document the pressure-measurement method, the recorded abdominal-pressure data, and how the measurement relates to the urodynamic study.
Can the professional and technical portions be billed separately?
Yes. Modifier 26 identifies the interpretation, and modifier TC identifies the equipment and staff portion. Billing without a modifier represents the global service.
Which primary procedures are commonly paired with 51797?
It is commonly reported with 51728 or 51729 when the study includes intra-abdominal pressure measurement. Select the primary procedure based on the urodynamic services 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 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.
6,08151792,,Urinary reflex study,A,,1.07,6.14,,6.14,NA,0.19,7.40,7.40,1,000,0.00,0.00,0.00,2,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
6,08251792,26,Urinary reflex study,A,,1.07,0.45,,0.45,,0.16,1.68,1.68,1,000,0.00,0.00,0.00,2,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
6,08351792,TC,Urinary reflex study,A,,0.00,5.69,,5.69,NA,0.03,5.72,5.72,1,000,0.00,0.00,0.00,2,0,0,0,0,9,,33.4009,02,0,99,0.00,0.00,0.00
6,08451797,,Intraabdominal pressure test,A,,0.78,3.79,,3.79,NA,0.07,4.64,4.64,1,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
6,08551797,26,Intraabdominal pressure test,A,,0.78,0.33,,0.33,,0.07,1.18,1.18,1,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
6,08651797,TC,Intraabdominal pressure test,A,,0.00,3.46,,3.46,NA,0.00,3.46,3.46,1,ZZZ,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,02,0,99,0.00,0.00,0.00
6,08751798,,Us urine capacity measure,A,,0.00,0.36,,0.36,NA,0.02,0.38,0.38,3,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
5006102,IL,15,SUBURBAN CHICAGO,1.007,1.027,1.772
5106102,IL,99,REST OF ILLINOIS,1.000,0.913,1.563
5208102,IN,00,INDIANA,1.000,0.927,0.486
5305102,IA,00,IOWA,1.000,0.915,0.397
5405202,KS,00,KANSAS,1.000,0.904,0.504
5515102,KY,00,KENTUCKY,1.000,0.889,0.915
5607202,LA,01,NEW ORLEANS,1.000,0.941,1.136