CPT code 50391: Renal instillation, through nephrostomy access2026 Medicare rate & RVUs in Alabama

In Alabama, Medicare pays $116.85 for 50391 in the office and $79.73 when it’s performed in a hospital or facility.

Check a contract rate as a % of Medicare · 50391 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 50391 covers

This service delivers a therapeutic agent into the renal pelvis or ureter through an established nephrostomy or nephroureteral catheter. A urologist or interventional radiologist may perform it when medication or a chemolytic solution is needed in the upper urinary tract, such as treatment intended to dissolve selected urinary stones. It may occur in a hospital or an appropriately equipped outpatient setting. Radiologic supervision and interpretation are part of the service.

Report the code when the documented treatment is instillation through the specified catheter route, rather than needle aspiration or injection of a renal cyst or pelvis. The record should identify the agent, treatment purpose, access route, and radiologic work. The service has a 0-day global period, so same-day preoperative and postoperative care is included. 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. For bilateral performance, modifier 50 is paid at 150%. Assistant-at-surgery payment is restricted; 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 Alabama compares for 50391

Across 109 of 109 payment localities, the office rate for 50391 runs from $115.55 in Arkansas to $159.16 in Alaska. Alabama pays $116.85. The RVUs are the same everywhere; the geographic indexes change the dollars.

Every other payment area

50391 rates by state

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

See 50391 in every payment locality

How the 50391 rate is calculated

Each of 50391’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 50391

The CMS indicators that decide how 50391 is paid alongside other services.

What modifiers do to the payment

When to use modifier 50

Codes related to 50391

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

How 50391 has changed in Alabama

Price 50391 for an earlier date of service

Where the Alabama rate applies

Alabama is a Medicare payment area, not a city. Our Census mapping connects it to 595 cities and communities in Alabama. Some span more than one payment area; confirm with the service ZIP.

• Abanda
• Abbeville
• Adamsville
• Addison
• Akron
• Alabaster
• Albertville
• Alexander City

Browse all communities in Alabama

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