50431 Njx procedures nfrosgrm and/or urtrgrm
Also known as: repeat pyelography, follow-up imaging, contrast study
Percutaneous injection under fluoroscopic guidance for nephrography and ureterography (radiographic imaging) with repeat or additional contrast studies.
In Plain Language
follow-up kidney and ureter x-ray with contrast; repeated diagnostic imaging
Clinical Context
Used for follow-up imaging of percutaneous access site patency or assessment of stone passage after treatment.
RVU Breakdown
| Work RVU | 1.07 |
| Total RVU | 1.07 |
Est. Medicare Payment
National estimate based on 2026 CMS PFS Conversion Factor ($33.40). Actual payment varies by locality (GPCI adjustment).
Billing & Documentation
As a surgical CPT code, proper documentation must include the operative report detailing the procedure performed, patient positioning, approach, findings, and any complications. This code has a 0-day global period, meaning pre- and post-operative E&M visits are billable separately on the same day. Ensure the diagnosis code (ICD-10) supports medical necessity for the procedure.
How This Code Compares
With a work RVU of 1.07, this code ranks in the 5th percentile among Surgery codes — 7.5x below the median (8.00). The highest wRVU in this category is 106.19.
Specialties
Frequently Asked Questions
What is CPT code 50431?
CPT 50431 (Njx procedures nfrosgrm and/or urtrgrm) is a Surgery code. Percutaneous injection under fluoroscopic guidance for nephrography and ureterography (radiographic imaging) with repeat or additional contrast studies.
What is the wRVU value for CPT 50431?
The work RVU for CPT 50431 is 1.07. This code is primarily used by Radiology, Urology, Interventional Radiology.
When is CPT 50431 used?
Used for follow-up imaging of percutaneous access site patency or assessment of stone passage after treatment.
Track This Code in RVU Edge
Log procedures, calculate wRVUs, and benchmark against MGMA data — all in one app.
CPT® is a registered trademark of the American Medical Association. Data sourced from CMS Physician Fee Schedule RVU26A. Descriptions, synonyms, and clinical context are original content by RVU Edge.