CPT code 35511: Artery bypass, subclavian to subclavian, vein graft2026 Medicare rate & RVUs in Illinois
Reports a vein-graft bypass connecting the subclavian arteries when a vascular surgeon routes blood around subclavian artery obstruction.
CMS doesn’t publish an office rate for 35511 in Illinois.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
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What 35511 covers
A vascular surgeon creates a bypass from one subclavian artery to the other using a vein graft. The operation provides a route for blood around disease affecting subclavian flow and is performed in an operating room. The operative report should identify both arterial connections and the vein conduit; the graft’s destination distinguishes this procedure from bypasses ending in the brachial, axillary, or vertebral artery.
Report 35511 for the completed subclavian-to-subclavian bypass, using the operative findings to confirm the inflow and outflow arteries. CMS assigns a 90-day global period that includes the day-before preoperative visit and 90 days of related postoperative care. If other procedures are performed in the same session, the highest-valued procedure is paid in full and others at 50%. For a bilateral procedure reported with modifier 50, CMS pays 150%; a single graft connecting arteries on opposite sides should not be mistaken for two bypasses. An assistant at surgery may be paid. Co-surgeons require supporting documentation, and CMS does not permit team surgery for this code.
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 35511 pays more and less in Illinois
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
| Payment locality | Office | Facility |
|---|---|---|
| Chicago, IL | Unavailable | $1,264.55 |
| East St. Louis, IL | Unavailable | $1,198.07 |
| Rest of Illinois | Unavailable | $1,113.98 |
| Suburban Chicago, IL | Unavailable | $1,170.41 |
How the 35511 rate is calculated
Each of 35511’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 · 35511
RVUs × geographic indexes × conversion factor
Work21.65
21.65 RVUs× 1.000 GPCI
Practice expense3.35
3.35 RVUs× 1.000 GPCI
Malpractice5.53
5.53 RVUs× 1.000 GPCI
Adjusted RVUs
30.5300
Conversion factor
$33.4009
Medicare rate
$1,019.73
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 35511
35511 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 35511
Artery bypass, subclavian to subclavian, vein graft
| 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) | 1 | Bilateral with modifier 50 pays 150% of the fee schedule amount. |
| Assistant at surgery (80/81/82/AS) | 2 | Paid. |
| Co-surgeons (62) | 1 | Permitted with supporting documentation. |
| 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 · 35511
Artery bypass, subclavian to subclavian, vein graft
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 50 · payment effect
With and without the modifier
35511 without 50 · national facility
$1,019.73
Artery bypass, subclavian to subclavian, vein graft
35511-50 · Bilateral: 150%
$1,529.60
Both sides on one line with modifier 50 are paid at 150% of the fee schedule amount (subject to multiple-procedure rules with other procedures).
35511 compared with similar codes
Compare codes · National
5 codes, side by side
How to choose
- 35506Arterial bypassSubclavian to carotid
- Both begin at a subclavian artery, but 35506 ends at a carotid artery. Use 35511 when the graft connects one subclavian artery to the other.
- 35512Arterial bypassSubclavian-to-brachial route
- Code 35512 routes the vein graft from a subclavian artery to a brachial artery. Code 35511 ends at a subclavian artery.
- 35516Arterial bypassSubclavian to axillary
- Choose 35516 when the outflow connection is an axillary artery; choose 35511 when it is a subclavian artery.
- 35518Arterial bypassAxillary to axillary
- Code 35518 connects axillary arteries. Code 35511 connects subclavian arteries; confirm both anastomosis sites in the operative report.
35511 billing questions
When is 35511 selected instead of 35512?
Select 35511 when the bypass ends in a subclavian artery. Code 35512 describes a bypass from a subclavian artery to a brachial artery.
Does a graft crossing from one side to the other require modifier 50?
The single subclavian-to-subclavian graft is not, by itself, two bilateral bypass procedures. CMS pays 150% for a bilateral procedure reported with modifier 50.
Which visits are included in the global period?
The 90-day global period includes the day-before preoperative visit and 90 days of related postoperative care.
How is 35511 paid with another procedure in the same session?
Under the standard multiple procedure reduction, CMS pays the highest-valued procedure in full and other procedures at 50%.
Can an assistant or co-surgeon be reported?
An assistant at surgery may be paid. Co-surgeon payment requires supporting documentation; CMS does not permit team surgery for 35511.
What operative details support selection of 35511?
The report should identify the subclavian artery at each end of the bypass and document the vein graft used to connect them.
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
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