CPT code 50430: Antegrade nephrostogram, existing access2026 Medicare rate & RVUs in Connecticut

In Connecticut, Medicare pays $660.54 for 50430 in the office and $142.17 when it’s performed in a hospital or facility.

Check a contract rate as a % of Medicare · 50430 nationwide

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

What 50430 covers

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.

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.

How Connecticut compares for 50430

Across 109 of 109 payment localities, the office rate for 50430 runs from $539.35 in Arkansas to $847.92 in San Benito County, CA. Connecticut pays $660.54. The RVUs are the same everywhere; the geographic indexes change the dollars.

Every other payment area

50430 rates by state

Office rate range in each state. Select a state to see its payment localities.

See 50430 in every payment locality

How the 50430 rate is calculated

Each of 50430’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.

Payment rules and modifiers for 50430

The CMS indicators that decide how 50430 is paid alongside other services.

What modifiers do to the payment

When to use modifier 50

Codes related to 50430

Related codes aren’t interchangeable: bill the code that matches the service performed.

How 50430 has changed in Connecticut

Price 50430 for an earlier date of service

Where the Connecticut rate applies

Connecticut is a Medicare payment area, not a city. Our Census mapping connects it to 215 cities and communities in Connecticut. Some span more than one payment area; confirm with the service ZIP.

• Ansonia
• Ball Pond
• Baltic
• Bantam
• Bethel
• Bethlehem Village
• Bigelow Corners
• Blue Hills

Browse all communities in Connecticut

Where these rates come from

FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.

CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027

Open CMS sourceHow we calculate rates