CPT code 33866: Aortic graft, hemiarch extension2026 Medicare rate & RVUs in Connecticut

In Connecticut, Medicare pays $887.13 for 33866 in a facility. There’s no office rate.

Check a contract rate as a % of Medicare · 33866 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 33866 covers

This add-on describes reconstruction of the proximal aortic arch’s hemiarch segment as part of an open aortic operation. The cardiac surgeon replaces the diseased portion with graft material, often while treating aneurysmal or other complex disease that also requires ascending aortic replacement. These procedures are typically performed in a hospital operating room with cardiopulmonary bypass; the operative report should identify the hemiarch work and the extent of aortic replacement performed.

Report 33866 with an eligible primary ascending aortic replacement, such as 33858, 33859, 33863, or 33864; it is not a stand-alone service. Documentation should distinguish hemiarch reconstruction from replacement limited to the ascending aorta and describe the grafted segment. CMS treats this as an add-on code billed with the primary procedure, with payment within that procedure’s global period.

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 33866

Across 109 of 109 payment localities, the facility rate for 33866 runs from $733.13 in Wisconsin to $1,069.27 in Alaska. Connecticut pays $887.13. The RVUs are the same everywhere; the geographic indexes change the dollars.

Every other payment area

33866 rates by state

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

See 33866 in every payment locality

How the 33866 rate is calculated

Each of 33866’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 33866

The CMS indicators that decide how 33866 is paid alongside other services.

Codes related to 33866

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

How 33866 has changed in Connecticut

Price 33866 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