CPT code 40899: Unlisted mouth procedure, oral vestibule2026 Medicare rate & RVUs in Connecticut

CMS doesn’t publish a rate for 40899 in Connecticut.

Check a contract rate as a % of Medicare · 40899 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 40899 covers

CPT 40899 is an unlisted procedure code for work involving the vestibule of the mouth when no listed CPT code describes the service. The oral vestibule is the space between the lips or cheeks and the teeth or gums. The code does not identify a particular technique or diagnosis, so the claim description should explain the procedure performed. Oral and maxillofacial surgeons and other clinicians performing oral procedures may report it. Before selecting it, compare the work with specific codes for services such as biopsy, lesion excision, or mouth reconstruction.

Medicare assigns physician fee schedule status C, or carrier priced: CMS publishes no national payment, and the Medicare Administrative Contractor sets payment for each claim. The contractor also sets the global period. For multiple procedures in one session, the highest-valued procedure is paid in full and other procedures at 50% under the stated Medicare multiple-procedure rule. Include claim details and clinical documentation that explain the unlisted service.

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 40899

Every other payment area

40899 rates by state

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

See 40899 in every payment locality

How the 40899 rate is calculated

Each of 40899’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 40899

The CMS indicators that decide how 40899 is paid alongside other services.

What modifiers do to the payment

When to use modifier 51

Codes related to 40899

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

How 40899 has changed in Connecticut

Price 40899 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