CPT code 31298: Sinus dilation, frontal and sphenoid2026 Medicare rate & RVUs in Mississippi

In Mississippi, Medicare pays $2,571.29 for 31298 in the office and $203.63 when it’s performed in a hospital or facility.

Check a contract rate as a % of Medicare · 31298 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 31298 covers

An otolaryngologist uses a nasal endoscope to access and enlarge the frontal and sphenoid sinus openings, commonly with a balloon catheter passed through the nasal cavity. The procedure may be performed for obstructed sinus drainage, including in patients with chronic rhinosinusitis, when the operative plan is dilation at both sites. It is typically performed in an operating or procedural setting; the record should identify each sinus treated and the dilation performed.

Report 31298 when both frontal and sphenoid openings are dilated during the operative session; single-sinus dilation codes distinguish treatment of only one site. Document the treated anatomy, laterality, and technique. CMS assigns a 0-day global period, so same-day preoperative and postoperative care is included. Related endoscopies performed together are subject to endoscopy-family pricing. For bilateral work, modifier 50 is 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 Mississippi compares for 31298

Across 109 of 109 payment localities, the office rate for 31298 runs from $2,561.06 in Arkansas to $4,209.05 in San Benito County, CA. Mississippi pays $2,571.29. The RVUs are the same everywhere; the geographic indexes change the dollars.

Every other payment area

31298 rates by state

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

See 31298 in every payment locality

How the 31298 rate is calculated

Each of 31298’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 31298

The CMS indicators that decide how 31298 is paid alongside other services.

What modifiers do to the payment

When to use modifier 50

Codes related to 31298

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

How 31298 has changed in Mississippi

Price 31298 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