$600.14–$655.23
Choose 50431 when the contrast study requires new percutaneous access. Choose 50430 when contrast is injected through existing access.
On this page
CMS RVU26D · Effective 2026-10-01
50431 Antegrade contrast study Medicare reimbursement rates in Florida
Reports a contrast study of the renal collecting system and ureter performed through newly established percutaneous access to assess drainage, patency, or obstruction. Compare 50431 office and facility rates across CMS payment localities in Florida.
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 50431 in Florida?
Florida has 3 payment localities in this comparison. Use the service location to choose the applicable amount. These are the supported base rates for the 3 payment areas shown below, using the same CMS release.
Office / nonfacility
$298.17–$325.08
3 of 3 localities have a supported rate.
Facility setting
$60.28–$66.04
3 of 3 localities have a 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.
Where 50431 pays more and less in Florida
3 payment localities
$298.17 to $325.08
Interventional radiology
About 50431: Antegrade urinary contrast study, new access
Reports a contrast study of the renal collecting system and ureter performed through newly established percutaneous access to assess drainage, patency, or obstruction.
An antegrade nephrostogram or ureterogram traces contrast from the kidney’s collecting system down the ureter. Code 50431 identifies a diagnostic study reached by creating new percutaneous access, rather than injecting contrast through an already-present nephrostomy catheter. An interventional radiologist or urologist typically uses ultrasound or fluoroscopy to guide access, injects contrast, and interprets the images in an interventional radiology suite or hospital procedure room. The study can help clarify suspected obstruction, a leak, or impaired drainage.
Report 50431 when the new access is used for the contrast examination and a catheter placement service does not account for the work. Nephrostomy or nephroureteral catheter placement codes include the diagnostic contrast study when performed, so do not separately report 50431 for that included imaging. Document the indication, newly obtained access, contrast examination, findings, and laterality. CMS assigns a 0-day global period, including same-day preoperative and postoperative care. For bilateral service, modifier 50 is paid at 150%. In a session with multiple procedures, the highest-valued procedure is paid in full and others at 50%. Assistant-at-surgery payment is barred; co-surgeon and team-surgery billing are not permitted.
CMS billing rules for 50431
- 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
- Statutory restriction: assistant at surgery is not paid.
- Co-surgeons
- Co-surgeons not permitted.
- Team surgery
- Team surgery not permitted.
Where the value comes from
- Work RVU1.07 · 12%
- Practice expense (office) RVU8.03 · 87%
- Malpractice RVU0.12 · 1%
5.1K
Medicare services in 2024 · #1852 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.
50431 compared with similar codes
Office rates for Florida, from the same CMS release.
$839.65–$915.54
50432 covers percutaneous nephrostomy catheter placement, including the diagnostic contrast study when performed. 50431 is for the contrast study through new access when catheter placement is not the service reported.
$1,044.46–$1,138.51
50433 covers nephroureteral catheter placement, including the diagnostic contrast study when performed. 50431 describes the new-access contrast study without that catheter placement service.
Compare 50431 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.
3 of 3 payment localities
Fort Lauderdale →
Office / nonfacility
$314.68
Facility
$62.61
Miami →
Office / nonfacility
$325.08
Facility
$66.04
Rest Of Florida →
Office / nonfacility
$298.17
Facility
$60.28
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50431 billing questions
How does 50431 differ from 50430?
50431 is for a contrast study reached through newly created percutaneous access. Use 50430 when the study uses existing access, such as an established nephrostomy catheter.
Can 50431 be reported with nephrostomy catheter placement?
The nephrostomy placement code includes the diagnostic nephrostogram or ureterogram when performed. Do not separately report 50431 for that included study.
Is imaging guidance or interpretation separately reported?
The code includes imaging guidance and the associated radiological interpretation for the contrast study.
How is bilateral service reported?
Report modifier 50 for bilateral service. CMS pays the bilateral procedure at 150%.
What documentation supports 50431?
Document why the study was needed, that access was newly obtained, the contrast examination and its findings, and the side or sides examined.
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.
5,91550400,,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
5,92150434,,Convert nephrostomy catheter,A,,3.66,21.83,,0.92,,0.41,25.90,4.99,0,000,0.00,0.00,0.00,2,1,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00