CPT code 33766: Glenn shunt, one lung2026 Medicare rate & RVUs in Montana

In Montana, Medicare pays $1,256.82 for 33766 in a facility. There’s no office rate.

Check a contract rate as a % of Medicare · 33766 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 33766 covers

A congenital cardiac surgeon creates a cavopulmonary connection by joining the superior vena cava to the pulmonary artery supplying one lung. This unilateral Glenn-type shunt redirects upper-body venous blood toward that lung and is used in selected congenital heart defects, often as part of staged palliation for single-ventricle physiology. The operative report should establish the vessels joined and that the connection serves one lung.

Select this code when the documented connection is to one lung; the bilateral-lung version is 33767. Record the anatomy, operative work, and clinical indication so the unilateral procedure can be distinguished from other systemic-to-pulmonary shunts. CMS 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 other procedures are subject to the standard 50% multiple-procedure reduction. Modifier 50 is inappropriate. Assistant-at-surgery payment may be available; co-surgeon payment requires supporting documentation, and team surgery is 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 Montana compares for 33766

Across 109 of 109 payment localities, the facility rate for 33766 runs from $1,111.16 in Wisconsin to $1,573.58 in Alaska. Montana pays $1,256.82. The RVUs are the same everywhere; the geographic indexes change the dollars.

Every other payment area

33766 rates by state

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

See 33766 in every payment locality

How the 33766 rate is calculated

Each of 33766’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 33766

33766 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 51

Codes related to 33766

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

How 33766 has changed in Montana

Price 33766 for an earlier date of service

Where the Montana rate applies

Montana is a Medicare payment area, not a city. Our Census mapping connects it to 497 cities and communities in Montana. Some span more than one payment area; confirm with the service ZIP.

• Absarokee
• Acton
• Alberton
• Alder
• Alzada
• Amsterdam
• Anaconda-Deer Lodge County
• Antelope

Browse all communities in Montana

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