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 in El Centro
Office / nonfacility
$166.50
Base rate per service
Facility setting
Not available in this setting
Base rate per service
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.
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 El Centro, from the same CMS release.
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.
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.
The same code, a different location
How does El Centro compare?
In Bakersfield, the office rate for 51797 is $166.71—$0.21 higher than the $166.50 rate in El Centro. Both use the same code, release and participation basis.
51797 across payment areas
Same release and payment basis · bars start at $0
El Centro · This locality
$166.50
$166.71
$0.21 higher than El Centro
$166.49
$0.01 lower than El Centro
$166.49
$0.01 lower than El Centro
$166.49
$0.01 lower than El Centro
$11.93 higher than El Centro
$166.49
$0.01 lower than El Centro
Other payment areas listed in California appear first, followed by selected cross-country examples. The chart compares amounts, not distance.
Across 109 of 109 CMS payment localities with a supported office rate, 51797 ranges from $136.00 in Arkansas to $212.71 in San Jose-Sunnyvale-Santa Clara (San Benito Cnty). This is a geographic range, not an average.
The code’s RVUs stay the same in these comparisons. Geographic adjustments to work, practice expense and malpractice change the dollar amount. A city name alone may not identify the payment area for a service address.
Compare all 108 other payment areas
Merced
California · 51797
Office
$166.49
Facility
Unavailable
$0.01 lower than El Centro for the office setting.
Modesto
California · 51797
Office
$166.49
Facility
Unavailable
$0.01 lower than El Centro for the office setting.
Napa
California · 51797
Office
$195.73
Facility
Unavailable
$29.23 higher than El Centro for the office setting.
Oxnard-Thousand Oaks-Ventura
California · 51797
Office
$177.87
Facility
Unavailable
$11.37 higher than El Centro for the office setting.
Redding
California · 51797
Office
$166.49
Facility
Unavailable
$0.01 lower than El Centro for the office setting.
Rest Of California
California · 51797
Office
$166.49
Facility
Unavailable
$0.01 lower than El Centro for the office setting.
Riverside-San Bernardino-Ontario
California · 51797
Office
$167.26
Facility
Unavailable
$0.76 higher than El Centro for the office setting.
Sacramento-Roseville-Folsom
California · 51797
Office
$175.47
Facility
Unavailable
$8.97 higher than El Centro for the office setting.
Salinas
California · 51797
Office
$174.83
Facility
Unavailable
$8.33 higher than El Centro for the office setting.
San Diego-Chula Vista-Carlsbad
California · 51797
Office
$179.50
Facility
Unavailable
$13.00 higher than El Centro for the office setting.
San Francisco-Oakland-Berkeley (Marin Cnty)
California · 51797
Office
$208.09
Facility
Unavailable
$41.59 higher than El Centro for the office setting.
San Francisco-Oakland-Berkeley (San Francisco/San Mateo/Alameda/Contra Costa Cnty)
California · 51797
Office
$208.01
Facility
Unavailable
$41.51 higher than El Centro for the office setting.
San Jose-Sunnyvale-Santa Clara (San Benito Cnty)
California · 51797
Office
$212.71
Facility
Unavailable
$46.21 higher than El Centro for the office setting.
San Jose-Sunnyvale-Santa Clara (Santa Clara Cnty)
California · 51797
Office
$212.39
Facility
Unavailable
$45.89 higher than El Centro for the office setting.
San Luis Obispo-Paso Robles
California · 51797
Office
$171.93
Facility
Unavailable
$5.43 higher than El Centro for the office setting.
Santa Cruz-Watsonville
California · 51797
Office
$181.66
Facility
Unavailable
$15.16 higher than El Centro for the office setting.
Santa Maria-Santa Barbara
California · 51797
Office
$175.64
Facility
Unavailable
$9.14 higher than El Centro for the office setting.
Santa Rosa-Petaluma
California · 51797
Office
$183.54
Facility
Unavailable
$17.04 higher than El Centro for the office setting.
Stockton
California · 51797
Office
$166.49
Facility
Unavailable
$0.01 lower than El Centro for the office setting.
Vallejo
California · 51797
Office
$195.61
Facility
Unavailable
$29.11 higher than El Centro for the office setting.
Visalia
California · 51797
Office
$166.49
Facility
Unavailable
$0.01 lower than El Centro for the office setting.
Yuba City
California · 51797
Office
$166.49
Facility
Unavailable
$0.01 lower than El Centro for the office setting.
Dc + Md/Va Suburbs
District of Columbia · 51797
Office
$179.18
Facility
Unavailable
$12.68 higher than El Centro for the office setting.
Miami
Florida · 51797
Office
$163.75
Facility
Unavailable
$2.75 lower than El Centro for the office setting.
Chicago
Illinois · 51797
Office
$158.82
Facility
Unavailable
$7.68 lower than El Centro for the office setting.
Manhattan
New York · 51797
Office
$178.53
Facility
Unavailable
$12.03 higher than El Centro for the office setting.
Alaska*
Alaska · 51797
Office
$175.19
Facility
Unavailable
$8.69 higher than El Centro for the office setting.
Alabama
Alabama · 51797
Office
$138.14
Facility
Unavailable
$28.36 lower than El Centro for the office setting.
Arkansas
Arkansas · 51797
Office
$136.00
Facility
Unavailable
$30.50 lower than El Centro for the office setting.
Arizona
Arizona · 51797
Office
$150.72
Facility
Unavailable
$15.78 lower than El Centro for the office setting.
Colorado
Colorado · 51797
Office
$162.88
Facility
Unavailable
$3.62 lower than El Centro for the office setting.
Connecticut
Connecticut · 51797
Office
$165.74
Facility
Unavailable
$0.76 lower than El Centro for the office setting.
Delaware
Delaware · 51797
Office
$153.36
Facility
Unavailable
$13.14 lower than El Centro for the office setting.
Fort Lauderdale
Florida · 51797
Office
$158.51
Facility
Unavailable
$7.99 lower than El Centro for the office setting.
Rest Of Florida
Florida · 51797
Office
$150.59
Facility
Unavailable
$15.91 lower than El Centro for the office setting.
Atlanta
Georgia · 51797
Office
$157.55
Facility
Unavailable
$8.95 lower than El Centro for the office setting.
Rest Of Georgia
Georgia · 51797
Office
$141.76
Facility
Unavailable
$24.74 lower than El Centro for the office setting.
Hawaii, Guam
Hawaii · 51797
Office
$171.34
Facility
Unavailable
$4.84 higher than El Centro for the office setting.
Iowa
Iowa · 51797
Office
$142.81
Facility
Unavailable
$23.69 lower than El Centro for the office setting.
Idaho
Idaho · 51797
Office
$143.62
Facility
Unavailable
$22.88 lower than El Centro for the office setting.
East St. Louis
Illinois · 51797
Office
$147.22
Facility
Unavailable
$19.28 lower than El Centro for the office setting.
Rest Of Illinois
Illinois · 51797
Office
$145.28
Facility
Unavailable
$21.22 lower than El Centro for the office setting.
Suburban Chicago
Illinois · 51797
Office
$160.39
Facility
Unavailable
$6.11 lower than El Centro for the office setting.
Indiana
Indiana · 51797
Office
$144.54
Facility
Unavailable
$21.96 lower than El Centro for the office setting.
Kansas
Kansas · 51797
Office
$141.67
Facility
Unavailable
$24.83 lower than El Centro for the office setting.
Kentucky
Kentucky · 51797
Office
$140.73
Facility
Unavailable
$25.77 lower than El Centro for the office setting.
New Orleans
Louisiana · 51797
Office
$147.83
Facility
Unavailable
$18.67 lower than El Centro for the office setting.
Rest Of Louisiana
Louisiana · 51797
Office
$140.32
Facility
Unavailable
$26.18 lower than El Centro for the office setting.
Metropolitan Boston
Massachusetts · 51797
Office
$180.35
Facility
Unavailable
$13.85 higher than El Centro for the office setting.
Rest Of Massachusetts
Massachusetts · 51797
Office
$161.63
Facility
Unavailable
$4.87 lower than El Centro for the office setting.
Baltimore/Surr. Cntys
Maryland · 51797
Office
$165.19
Facility
Unavailable
$1.31 lower than El Centro for the office setting.
Rest Of Maryland
Maryland · 51797
Office
$156.57
Facility
Unavailable
$9.93 lower than El Centro for the office setting.
Rest Of Maine
Maine · 51797
Office
$143.97
Facility
Unavailable
$22.53 lower than El Centro for the office setting.
Southern Maine
Maine · 51797
Office
$152.98
Facility
Unavailable
$13.52 lower than El Centro for the office setting.
Detroit
Michigan · 51797
Office
$152.15
Facility
Unavailable
$14.35 lower than El Centro for the office setting.
Rest Of Michigan
Michigan · 51797
Office
$144.27
Facility
Unavailable
$22.23 lower than El Centro for the office setting.
Minnesota
Minnesota · 51797
Office
$157.01
Facility
Unavailable
$9.49 lower than El Centro for the office setting.
Metropolitan Kansas City
Missouri · 51797
Office
$147.20
Facility
Unavailable
$19.30 lower than El Centro for the office setting.
Metropolitan St. Louis
Missouri · 51797
Office
$148.91
Facility
Unavailable
$17.59 lower than El Centro for the office setting.
Rest Of Missouri
Missouri · 51797
Office
$137.45
Facility
Unavailable
$29.05 lower than El Centro for the office setting.
Mississippi
Mississippi · 51797
Office
$136.77
Facility
Unavailable
$29.73 lower than El Centro for the office setting.
Montana**
Montana · 51797
Office
$154.98
Facility
Unavailable
$11.52 lower than El Centro for the office setting.
North Carolina
North Carolina · 51797
Office
$145.65
Facility
Unavailable
$20.85 lower than El Centro for the office setting.
North Dakota**
North Dakota · 51797
Office
$153.59
Facility
Unavailable
$12.91 lower than El Centro for the office setting.
Nebraska
Nebraska · 51797
Office
$143.78
Facility
Unavailable
$22.72 lower than El Centro for the office setting.
New Hampshire
New Hampshire · 51797
Office
$159.88
Facility
Unavailable
$6.62 lower than El Centro for the office setting.
Northern Nj
New Jersey · 51797
Office
$177.03
Facility
Unavailable
$10.53 higher than El Centro for the office setting.
Rest Of New Jersey
New Jersey · 51797
Office
$167.90
Facility
Unavailable
$1.40 higher than El Centro for the office setting.
New Mexico
New Mexico · 51797
Office
$144.94
Facility
Unavailable
$21.56 lower than El Centro for the office setting.
Nevada**
Nevada · 51797
Office
$154.72
Facility
Unavailable
$11.78 lower than El Centro for the office setting.
Nyc Suburbs/Long Island
New York · 51797
Office
$182.58
Facility
Unavailable
$16.08 higher than El Centro for the office setting.
Poughkpsie/N Nyc Suburbs
New York · 51797
Office
$168.67
Facility
Unavailable
$2.17 higher than El Centro for the office setting.
Queens
New York · 51797
Office
$180.72
Facility
Unavailable
$14.22 higher than El Centro for the office setting.
Rest Of New York
New York · 51797
Office
$147.96
Facility
Unavailable
$18.54 lower than El Centro for the office setting.
Ohio
Ohio · 51797
Office
$143.99
Facility
Unavailable
$22.51 lower than El Centro for the office setting.
Oklahoma
Oklahoma · 51797
Office
$140.91
Facility
Unavailable
$25.59 lower than El Centro for the office setting.
Portland
Oregon · 51797
Office
$168.85
Facility
Unavailable
$2.35 higher than El Centro for the office setting.
Rest Of Oregon
Oregon · 51797
Office
$153.78
Facility
Unavailable
$12.72 lower than El Centro for the office setting.
Metropolitan Philadelphia
Pennsylvania · 51797
Office
$161.09
Facility
Unavailable
$5.41 lower than El Centro for the office setting.
Rest Of Pennsylvania
Pennsylvania · 51797
Office
$144.47
Facility
Unavailable
$22.03 lower than El Centro for the office setting.
Puerto Rico
Puerto Rico · 51797
Office
$156.34
Facility
Unavailable
$10.16 lower than El Centro for the office setting.
Rhode Island
Rhode Island · 51797
Office
$159.40
Facility
Unavailable
$7.10 lower than El Centro for the office setting.
South Carolina
South Carolina · 51797
Office
$145.01
Facility
Unavailable
$21.49 lower than El Centro for the office setting.
South Dakota**
South Dakota · 51797
Office
$153.43
Facility
Unavailable
$13.07 lower than El Centro for the office setting.
Tennessee
Tennessee · 51797
Office
$142.38
Facility
Unavailable
$24.12 lower than El Centro for the office setting.
Austin
Texas · 51797
Office
$162.11
Facility
Unavailable
$4.39 lower than El Centro for the office setting.
Beaumont
Texas · 51797
Office
$143.42
Facility
Unavailable
$23.08 lower than El Centro for the office setting.
Brazoria
Texas · 51797
Office
$153.53
Facility
Unavailable
$12.97 lower than El Centro for the office setting.
Dallas
Texas · 51797
Office
$154.38
Facility
Unavailable
$12.12 lower than El Centro for the office setting.
Fort Worth
Texas · 51797
Office
$153.14
Facility
Unavailable
$13.36 lower than El Centro for the office setting.
Galveston
Texas · 51797
Office
$153.90
Facility
Unavailable
$12.60 lower than El Centro for the office setting.
Houston
Texas · 51797
Office
$155.18
Facility
Unavailable
$11.32 lower than El Centro for the office setting.
Rest Of Texas
Texas · 51797
Office
$148.30
Facility
Unavailable
$18.20 lower than El Centro for the office setting.
Utah
Utah · 51797
Office
$147.15
Facility
Unavailable
$19.35 lower than El Centro for the office setting.
Virginia
Virginia · 51797
Office
$152.14
Facility
Unavailable
$14.36 lower than El Centro for the office setting.
Virgin Islands
United States Virgin Islands · 51797
Office
$156.34
Facility
Unavailable
$10.16 lower than El Centro for the office setting.
Vermont
Vermont · 51797
Office
$152.56
Facility
Unavailable
$13.94 lower than El Centro for the office setting.
Rest Of Washington
Washington · 51797
Office
$161.47
Facility
Unavailable
$5.03 lower than El Centro for the office setting.
Seattle (King Cnty)
Washington · 51797
Office
$184.59
Facility
Unavailable
$18.09 higher than El Centro for the office setting.
Wisconsin
Wisconsin · 51797
Office
$148.05
Facility
Unavailable
$18.45 lower than El Centro for the office setting.
West Virginia
West Virginia · 51797
Office
$139.40
Facility
Unavailable
$27.10 lower than El Centro for the office setting.
Wyoming**
Wyoming · 51797
Office
$154.37
Facility
Unavailable
$12.13 lower than El Centro for the office setting.
See how rates vary across the country
51797 · Office / nonfacility · Non-QP. Choose a state to explore its payment localities. A range means the amount varies within that state.
Explore a state
Local rates. Clear comparisons.
Hover or focus a tile to see its rate range. Select it to open the state’s fee schedule.
$136.00
$189.60
Color shows the midpoint of each state’s locality range.
View all state and territory rates as a table
| State / territory | Rate range | Localities |
|---|---|---|
| AK | $175.19 | 1 |
| AL | $138.14 | 1 |
| AR | $136.00 | 1 |
| AZ | $150.72 | 1 |
| CA | $166.49–$212.71 | 29 |
| CO | $162.88 | 1 |
| CT | $165.74 | 1 |
| DC | $179.18 | 1 |
| DE | $153.36 | 1 |
| FL | $150.59–$163.75 | 3 |
| GA | $141.76–$157.55 | 2 |
| GU | $171.34 | 1 |
| HI | $171.34 | 1 |
| IA | $142.81 | 1 |
| ID | $143.62 | 1 |
| IL | $145.28–$160.39 | 4 |
| IN | $144.54 | 1 |
| KS | $141.67 | 1 |
| KY | $140.73 | 1 |
| LA | $140.32–$147.83 | 2 |
| MA | $161.63–$180.35 | 2 |
| MD | $156.57–$179.18 | 3 |
| ME | $143.97–$152.98 | 2 |
| MI | $144.27–$152.15 | 2 |
| MN | $157.01 | 1 |
| MO | $137.45–$148.91 | 3 |
| MS | $136.77 | 1 |
| MT | $154.98 | 1 |
| NC | $145.65 | 1 |
| ND | $153.59 | 1 |
| NE | $143.78 | 1 |
| NH | $159.88 | 1 |
| NJ | $167.90–$177.03 | 2 |
| NM | $144.94 | 1 |
| NV | $154.72 | 1 |
| NY | $147.96–$182.58 | 5 |
| OH | $143.99 | 1 |
| OK | $140.91 | 1 |
| OR | $153.78–$168.85 | 2 |
| PA | $144.47–$161.09 | 2 |
| PR | $156.34 | 1 |
| RI | $159.40 | 1 |
| SC | $145.01 | 1 |
| SD | $153.43 | 1 |
| TN | $142.38 | 1 |
| TX | $143.42–$162.11 | 8 |
| UT | $147.15 | 1 |
| VA | $152.14–$179.18 | 2 |
| VI | $156.34 | 1 |
| VT | $152.56 | 1 |
| WA | $161.47–$184.59 | 2 |
| WI | $148.05 | 1 |
| WV | $139.40 | 1 |
| WY | $154.37 | 1 |
Where does this rate apply?
El Centro is a Medicare payment area. Our Census mapping connects it to 18 cities and communities in California, including the examples shown here.
Some communities span more than one payment area. Follow a city link to compare all of its mapped areas, or check the service-location ZIP above for an address-level starting point.
Use this rate
What is a percentage of Medicare worth?
Turn a percentage into dollars for 51797 in El Centro. This uses the base rate on this page, so the locality and release stay consistent.
Reference amount per service
$183.15
$166.50 × 110% = $183.15
A contract may specify another Medicare year or additional adjustments. This is percentage arithmetic on the displayed base rate, not a claim adjudication.
Working with a whole code list?
Compare an offer across your annual code mix, including an older Medicare schedule or flat per-code rates.
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 El Centro.
PPRRVU2026_Oct_nonQPP.csv
6,084
- Code
- 51797
- Physician work
- 0.78
- Practice expense
- 3.79
- Malpractice
- 0.07
GPCI2026.csv
10
- Locality
- El Centro
- Physician work
- 1.017
- Practice expense
- 1.096
- Malpractice
- 0.541
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 0.78 | × 1.017 | 0.7933 |
| Practice expense | 3.79 | × 1.096 | 4.1538 |
| Malpractice | 0.07 | × 0.541 | 0.0379 |
| Total RVUs | 4.9850 | ||
| Conversion factor | × 33.4009 | ||
Office / nonfacility rate, El Centro$166.50
Open 51797 in the RVU calculator →
Explore RVUs, geographic factors and the full formula
Office / nonfacility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 0.78 | 1.017 |
| Practice expense | 3.79 | 1.096 |
| Malpractice | 0.07 | 0.541 |
(0.78 × 1.017 + 3.79 × 1.096 + 0.07 × 0.541) × $33.4009 = $166.50
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.
How this rate has changed
51797 · Office / nonfacility
$166.50
Effective 2026-10-01
The base rate is $6.34 lower than on 2025-10-01, moving from $172.84 to $166.50 (3.7%).
It is unchanged from the immediately preceding available release, effective 2026-07-01.
One bar per available release, ordered by effective date. Missing rates remain gaps. These comparisons hold the code, setting and locality identifiers constant; they do not isolate which policy or input caused a change.
What changed, release by release
January 1, 2026
RVU26A
$172.84changed to$166.50
- Conversion factor 32.3465 changed to 33.4009
- Work RVU 0.80 changed to 0.78
- Practice expense RVU 4.11 changed to 3.79
- Work GPCI 1.014 changed to 1.017
- Practice expense GPCI 1.093 changed to 1.096
- Malpractice GPCI 0.570 changed to 0.541
Held through RVU26B, RVU26C, RVU26D.
January 1, 2025
RVU25A
Earliest loaded release: $172.84
Held through RVU25B, RVU25C, RVU25D.
Explore release dates and calculate this code in an earlier period →
Each row uses the accepted CMS release effective on that date and the same contractor and locality identifiers. Missing rates stay visible. Historical boundaries may differ; verify the service address for an older claim.
Inspect every release and its CMS source
| Effective from | Office / nonfacility | Facility | CMS release |
|---|---|---|---|
| 2026-10-01 | $166.50 | Not available in this setting | RVU26D |
| 2026-07-01 | $166.50 | Not available in this setting | RVU26C |
| 2026-04-01 | $166.50 | Not available in this setting | RVU26B |
| 2026-01-01 | $166.50 | Not available in this setting | RVU26A |
| 2025-10-01 | $172.84 | Not available in this setting | RVU25D |
| 2025-07-01 | $172.84 | Not available in this setting | RVU25C |
| 2025-04-01 | $172.84 | Not available in this setting | RVU25B |
| 2025-01-01 | $172.84 | Not available in this setting | RVU25A |
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.
