CPT code 45999: Rectal procedure, no listed code2026 Medicare rate & RVUs in Mississippi

CMS doesn’t publish a rate for 45999 in Mississippi.

Check a contract rate as a % of Medicare · 45999 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 45999 covers

This code identifies a procedure involving the rectum when no listed CPT procedure code accurately represents the work. Colorectal and general surgeons may report it for a procedural service that does not match a defined rectal procedure; it is not a substitute for a listed code that describes the service. Listed procedures include reduction of rectal prolapse, dilation of the anal sphincter or a rectal narrowing, and removal of a rectal obstruction. The operative documentation should explain the condition treated and the technique and work performed, allowing the unlisted service to be evaluated.

For Medicare physician fee schedule purposes, 45999 has status C: CMS publishes no national payment, and the Medicare Administrative Contractor sets payment for each claim. The contractor also sets the global period. When procedures are performed in the same session, Medicare applies its standard multiple procedure reduction: the highest-valued procedure is paid in full and other procedures are paid at 50%.

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 Mississippi compares for 45999

Every other payment area

45999 rates by state

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

See 45999 in every payment locality

How the 45999 rate is calculated

Each of 45999’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 45999

The CMS indicators that decide how 45999 is paid alongside other services.

What modifiers do to the payment

When to use modifier 51

Codes related to 45999

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

How 45999 has changed in Mississippi

Price 45999 for an earlier date of service

Where the Mississippi rate applies

Mississippi is a Medicare payment area, not a city. Our Census mapping connects it to 427 cities and communities in Mississippi. Some span more than one payment area; confirm with the service ZIP.

• Abbeville
• Aberdeen
• Ackerman
• Agricola
• Alcorn State University
• Algoma
• Alligator
• Amory

Browse all communities in Mississippi

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