CPT code 33864: Aortic graft, with root replacement and CABG2026 Medicare rate & RVUs

Medicare pays $2,966.33 for 33864 nationally in a facility.

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

What 33864 covers

This code describes replacement of the ascending aorta and aortic root with a valved conduit, reconstruction of the coronary arteries, and coronary artery bypass grafting during the same operation. Cardiac surgeons typically perform this open procedure in a hospital operating room, often using cardiopulmonary bypass. A Bentall-type root replacement is a familiar example; coronary reimplantation into the conduit is distinct from bypass grafting to a diseased coronary artery.

Choose this code when the operative report supports the root conduit, coronary reconstruction, and CABG combination. Document the aortic and root work, the coronary reconstruction, and the bypass grafting performed. The 90-day global period includes 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 multiple procedure reduction. Modifier 50 is inappropriate. Assistant-at-surgery payment may be made; 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.

Where 33864 pays more and less

The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.

109 of 109 payment localities

33864 rates by state

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

How the 33864 rate is calculated

Each of 33864’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 33864

33864 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

33864 compared with similar codes

How to choose

33863Aortic graftValve conduit, coronary reconstruction

Both include ascending aortic root replacement with a valved conduit and coronary reconstruction. Select 33864 when CABG is also performed; 33863 is the corresponding root procedure without that CABG distinction.

33858Aortic graftAscending aorta, dissection

This code covers ascending aortic replacement for aortic disease other than dissection without root replacement using a valved conduit. It does not represent the combined root-and-CABG operation.

33859Aortic graftNon-dissection disease

This code covers ascending aortic replacement for dissection without root replacement using a valved conduit. Use 33864 for the root conduit, coronary reconstruction, and CABG combination.

Codes related to 33864

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

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