Billing code 33510: Coronary bypassMedicare rate & RVUs in Oregon
Report this code for coronary artery bypass surgery using one venous graft to bypass one coronary target, without an arterial bypass graft.
CMS doesn’t publish an office rate for 33510 in Oregon.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
On this page 9 sections
What 33510 covers
A cardiac surgeon uses a vein conduit, commonly the saphenous vein, to route blood around a blocked coronary artery. This code describes a bypass using one venous graft to one coronary target. The operation is performed in a cardiac operating room, usually in a hospital; the code identifies the graft configuration rather than whether the operation is performed on or off pump.
Select the code from the operative report’s account of the conduit type and number of coronary targets bypassed. A single venous graft supports this code; two or more venous grafts point to higher-count codes in the same series. The 90-day global period includes the day-before preoperative visit and related postoperative care during the 90 days after surgery. When multiple procedures occur in the same session, the highest-valued procedure is paid in full and others at 50%. Assistant-at-surgery payment may be made; co-surgeons and team surgery are not permitted. Modifier 50 is inappropriate for this descriptor and anatomy.
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 33510 pays more and less in Oregon
| Payment locality | Office | Facility |
|---|---|---|
| Portland | Unavailable | $1,805.26 |
| Rest Of Oregon | Unavailable | $1,730.06 |
How the 33510 rate is calculated
Each of 33510’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.
How the rate is built · 33510
RVUs × geographic indexes × conversion factor
Work34.11
34.11 RVUs× 1.000 GPCI
Practice expense11.85
11.85 RVUs× 1.000 GPCI
Malpractice8.37
8.37 RVUs× 1.000 GPCI
Adjusted RVUs
54.3300
Conversion factor
$33.4009
Medicare rate
$1,814.67
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 33510
33510 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 33510
Coronary bypass
| Rule | CMS value | What it means |
|---|---|---|
| Global period | 090 | Major surgery: the day before, the day of, and 90 days after are included. |
| Multiple procedures | 2 | Standard reduction: highest-valued procedure at 100%, others at 50%. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 2 | Paid. |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 0 | Physician service: no professional/technical split. |
| Split (54/55/56) | 0.09/0.84/0.07 | Share of the payment for pre-op, the procedure itself, and post-op care. |
Global surgery period · 33510
Coronary bypass
90-day global period ends
Dec 30, 2026
Covers Sep 30, 2026 through Dec 30, 2026 (92 days, including the day before surgery).
Visit on Oct 31, 2026
Day 30 of the 90-day post-op period: related follow-up care is included in the surgical payment.
Pre-op dayGlobal period
What modifiers do to the payment
Modifier 51 · payment effect
With and without the modifier
33510 without 51 · national facility
$1,814.67
Coronary bypass
33510-51 · Second procedure: 50%
$907.34
When this isn’t the highest-valued procedure in the session, Medicare pays 50% of its fee schedule amount (the highest is paid at 100%).
33510 compared with similar codes
Compare codes · National
5 codes, side by side
How to choose
- 33511Coronary bypass
- Use 33510 for one venous bypass graft and 33511 for two. The operative report’s graft count distinguishes them.
- 33517Combined CABG
- Use 33517 for the venous portion of a mixed arterial-and-venous CABG configuration; 33510 describes a vein-only configuration.
- 33533Arterial CABG
- 33533 describes a single arterial bypass graft. This code describes a single venous bypass graft.
- 33508Vein harvest
- 33508 identifies endoscopic vein harvesting, not the coronary bypass itself. This code reports the single venous bypass graft.
33510 billing questions
How is this code distinguished from 33511?
This code represents one venous coronary bypass graft. Code 33511 represents two venous grafts; use the operative report’s documented graft count.
Does the number of harvested veins determine the code?
Choose the CABG code based on the bypass graft configuration and coronary targets documented in the operative report, not simply the amount of vein harvested.
Can vein harvesting be reported separately?
Endoscopic vein harvesting has a separate code, 33508. The operative documentation should identify the harvesting method and the CABG procedure performed.
Can modifier 50 be used for a bypass on both sides?
No. Bilateral adjustment is inappropriate for this descriptor and anatomy.
How are multiple procedures and postoperative visits handled?
The 90-day global period includes the day-before preoperative visit and related postoperative care. For multiple procedures in the same session, the highest-valued procedure is paid in full and others at 50%.
May an assistant or co-surgeon be reported?
Assistant-at-surgery payment may be made. Co-surgeons and team surgery are not permitted for this code.
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
Show the CMS file lines behind this rate
Fee sheets
Put 33510 and the rest of your codes on one sheet
Build a fee sheet from your own code list at your locality, put your payer contracts beside Medicare, and see what changed each quarter.
Build my fee sheetOr price your code list free →