CPT code 66184: Shunt revision, without graft2026 Medicare rate & RVUs in New Mexico

In New Mexico, Medicare pays $662.73 for 66184 in a facility. There’s no office rate.

Check a contract rate as a % of Medicare · 66184 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 66184 covers

An ophthalmic surgeon, often a glaucoma specialist, revises an existing aqueous shunt used to control intraocular pressure. The work may address a tube or reservoir problem, such as obstruction or malposition, to restore drainage or improve shunt function. This code distinguishes revision without a graft from revision that includes graft material, which is reported with 66185.

Select the code from the operative report’s description of the revision and whether graft material was used; do not use it for initial shunt placement. Documentation should identify the existing device, the problem addressed, the revision performed, and graft use or nonuse. Medicare assigns a 90-day global period, including the day-before preoperative visit and 90 days of related postoperative care. When multiple procedures are performed in the same session, the highest-valued procedure is paid in full and others at 50%. Bilateral reporting with modifier 50 is paid at 150%. An assistant at surgery may be paid; 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 New Mexico compares for 66184

Across 109 of 109 payment localities, the facility rate for 66184 runs from $625.26 in Arkansas to $863.99 in San Benito County, CA. New Mexico pays $662.73. The RVUs are the same everywhere; the geographic indexes change the dollars.

Every other payment area

66184 rates by state

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

See 66184 in every payment locality

How the 66184 rate is calculated

Each of 66184’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 66184

66184 has a 90-day global period: related visits in that window are included in the surgery payment.

What modifiers do to the payment

When to use modifier 50

Codes related to 66184

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

How 66184 has changed in New Mexico

Price 66184 for an earlier date of service

Where the New Mexico rate applies

New Mexico is a Medicare payment area, not a city. Our Census mapping connects it to 528 cities and communities in New Mexico. Some span more than one payment area; confirm with the service ZIP.

• Abeytas
• Abiquiu
• Acomita Lake
• Adelino
• Agua Fria
• Alamillo
• Alamo
• Alamogordo

Browse all communities in New Mexico

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