$317.05
The access circumstance distinguishes the codes: 50430 uses established access, while 50431 applies when access is newly obtained for the study.
On this page
CMS RVU26D · Effective 2026-10-01
50430 Antegrade nephrostogram Medicare reimbursement rates in Rhode Island
Reports contrast imaging of the renal collecting system and ureter through an established percutaneous access to assess drainage, patency, or obstruction. Compare 50430 office and facility rates across CMS payment localities in Rhode Island.
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 50430 in Rhode Island?
Rhode Island 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
$634.35
1 of 1 localities have a supported rate.
Payment area: Rhode Island
One mapped payment locality.
Facility setting
$137.16
1 of 1 localities have a supported rate.
Payment area: Rhode Island
One mapped payment locality.
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.
Genitourinary radiology
About 50430: Antegrade nephrostogram through existing access
Reports contrast imaging of the renal collecting system and ureter through an established percutaneous access to assess drainage, patency, or obstruction.
A radiologist, interventional radiologist, or urologist injects contrast through an existing nephrostomy or other percutaneous urinary access and images the renal collecting system and ureter. The study can clarify whether contrast passes into the bladder, identify an obstruction or leak, or assess the position and function of an existing drainage catheter. It is performed in a setting equipped for image-guided urinary procedures.
Report 50430 when the diagnostic antegrade study uses established access; 50431 is the corresponding code when access is newly obtained. The service includes imaging guidance and the associated radiological supervision and interpretation, so those elements are not separately reported for the same study. Documentation should identify the access used, the contrast study performed, and the diagnostic findings. The code has a 0-day global period, including same-day preoperative and postoperative care. When multiple procedures occur in one session, the highest-valued procedure is paid in full and other procedures are subject to the standard 50% reduction. Modifier 50 applies to a bilateral procedure, paid at 150%. Assistant-at-surgery payment requires documented medical necessity; co-surgeons and team surgery are not permitted.
CMS billing rules for 50430
- Global period
- Minor procedure with a 0-day global period: same-day preoperative and postoperative care is included.
- Multiple procedures
- Standard multiple procedure reduction: the highest-valued procedure is paid in full and others at 50% when performed in the same session.
- Bilateral procedures
- Bilateral procedure with modifier 50 is paid at 150%.
- 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 RVU2.83 · 15%
- Practice expense (office) RVU15.30 · 83%
- Malpractice RVU0.34 · 2%
544
Medicare services in 2024 · #3480 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.
50430 compared with similar codes
Office rates for Rhode Island, from the same CMS release.
$888.75
50430 is a contrast study through established access; 50432 reports placement of a nephrostomy catheter to establish drainage.
$580.30
50430 reports diagnostic contrast imaging through existing access. Use 50435 when the performed service is exchange of a nephrostomy catheter.
Compare 50430 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
Rhode Island →
Office / nonfacility
$634.35
Facility
$137.16
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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 50430 in Rhode Island.
PPRRVU2026_Oct_nonQPP.csv
5,917
- Code
- 50430
- Physician work
- 2.83
- Practice expense
- 15.30
- Malpractice
- 0.34
GPCI2026.csv
92
- Locality
- Rhode Island
- Physician work
- 1.019
- Practice expense
- 1.033
- Malpractice
- 0.892
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 2.83 | × 1.019 | 2.8838 |
| Practice expense | 15.30 | × 1.033 | 15.8049 |
| Malpractice | 0.34 | × 0.892 | 0.3033 |
| Total RVUs | 18.9919 | ||
| Conversion factor | × 33.4009 | ||
Office / nonfacility rate, Rhode Island$634.35
Explore RVUs, geographic factors and the full formula
Office / nonfacility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 2.83 | 1.019 |
| Practice expense | 15.3 | 1.033 |
| Malpractice | 0.34 | 0.892 |
(2.83 × 1.019 + 15.3 × 1.033 + 0.34 × 0.892) × $33.4009 = $634.35
Facility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 2.83 | 1.019 |
| Practice expense | 0.89 | 1.033 |
| Malpractice | 0.34 | 0.892 |
(2.83 × 1.019 + 0.89 × 1.033 + 0.34 × 0.892) × $33.4009 = $137.16
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.
50430 billing questions
When should 50430 be chosen over 50431?
Use 50430 for the antegrade study through established percutaneous access. Use 50431 when access is newly obtained for the study.
Can imaging guidance or radiological interpretation be billed separately?
No. The code includes imaging guidance and associated radiological supervision and interpretation for the study.
How should bilateral studies be reported?
For a bilateral procedure, report modifier 50; CMS pays the procedure at 150%.
How does payment work when another procedure is performed in the same session?
The highest-valued procedure is paid in full, and other procedures are subject to the standard multiple procedure reduction, with payment at 50%.
What documentation supports 50430?
Document that the access was established before the study, the contrast imaging performed, and the findings relevant to drainage, patency, obstruction, leak, or catheter position.
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.
5,91450396,,Measure kidney pressure,A,,2.04,0.76,NA,0.76,,0.20,3.00,3.00,0,000,0.00,0.00,0.00,2,1,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
5,91550400,,Revision of kidney/ureter,A,,20.74,7.52,NA,7.52,,2.67,30.93,30.93,0,090,0.08,0.83,0.09,2,1,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
5,91650405,,Revision of kidney/ureter,A,,25.21,8.78,NA,8.78,,3.24,37.23,37.23,0,090,0.08,0.83,0.09,2,1,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
5,91750430,,Njx px nfrosgrm &/urtrgrm,A,,2.83,15.30,,0.89,,0.34,18.47,4.06,0,000,0.00,0.00,0.00,2,1,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
5,91850431,,Njx px nfrosgrm &/urtrgrm,A,,1.07,8.03,,0.58,,0.12,9.22,1.77,0,000,0.00,0.00,0.00,2,1,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
5,91950432,,Plmt nephrostomy catheter,A,,3.90,21.54,,0.99,,0.43,25.87,5.32,0,000,0.00,0.00,0.00,2,1,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
5,92050433,,Plmt nephroureteral catheter,A,,4.92,26.73,,1.12,,0.53,32.18,6.57,0,000,0.00,0.00,0.00,2,1,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
8912502,PA,01,METROPOLITAN PHILADELPHIA,1.018,1.041,1.193
9012502,PA,99,REST OF PENNSYLVANIA,1.000,0.918,0.945
9109202,PR,20,PUERTO RICO,1.000,1.011,0.985
9214412,RI,01,RHODE ISLAND,1.019,1.033,0.892
9311202,SC,01,SOUTH CAROLINA,1.000,0.924,0.850
9403402,SD,02,SOUTH DAKOTA**,1.000,1.000,0.336
9510312,TN,35,TENNESSEE,1.000,0.909,0.537