Billing code 35563: Iliac bypassMedicare rate & RVUs in Washington
Reports an open arterial bypass using a vein conduit to route blood between iliac arteries when the native iliac pathway is unusable.
CMS doesn’t publish an office rate for 35563 in Washington.
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 35563 covers
Code 35563 represents an open arterial bypass using a vein conduit, with the connection running from one iliac artery to another. Vascular surgeons perform this operation in an operating room to route blood around diseased, obstructed, or otherwise unusable iliac arterial segments. The operative report should identify the donor and recipient iliac vessels, the bypass route, and the vein conduit; a connection from the aorta or to a femoral artery is a different route.
Select the code from the actual inflow and outflow vessels and the conduit used, not from the diagnosis alone. CMS assigns this major surgery a 90-day global period, including the day-before preoperative visit and 90 days of related postoperative care. When multiple procedures occur in the same session, the highest-valued procedure is paid in full and other procedures at 50%. A bilateral procedure reported with modifier 50 is paid at 150%. Assistant-at-surgery services may be paid; co-surgeons are paid only with 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 35563 pays more and less in Washington
| Payment locality | Office | Facility |
|---|---|---|
| Rest Of Washington | Unavailable | $1,170.85 |
| Seattle (King Cnty) | Unavailable | $1,238.25 |
How the 35563 rate is calculated
Each of 35563’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 · 35563
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 25.47Practice expense 4.09Malpractice 6.50
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 35563
35563 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 35563
Iliac 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) | 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 · 35563
Iliac 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 50 · payment effect
With and without the modifier
35563 without 50 · national facility
$1,204.44
Iliac bypass
35563-50 · Bilateral: 150%
$1,806.66
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).
35563 compared with similar codes
Compare codes
35563 vs 35663 vs 35537 vs 35565: national Medicare rates
Swap in your local Medicare rate.
How to choose
- 35663Arterial bypass
- Both codes describe an iliac-to-iliac bypass route. Choose 35563 when the conduit is vein and 35663 when it is another type of conduit.
- 35537Aortoiliac bypass
- 35537 describes an aortoiliac bypass. Use 35563 when both ends of the bypass are iliac arteries rather than one end being the aorta.
- 35565Arterial bypass
- 35565 describes an iliac-to-femoral bypass. Use 35563 when the outflow connection is to another iliac artery, not a femoral artery.
35563 billing questions
When is 35563 the right bypass code?
Use it when the bypass connects one iliac artery to another and uses a vein conduit. Identify both vessels and the conduit in the operative report.
How does 35563 differ from 35663?
The route is iliac-to-iliac for both, but 35563 is for a vein conduit; 35663 is used for a conduit other than vein.
Would an aorta-to-iliac bypass be reported with 35563?
No. 35563 describes an iliac-to-iliac route; a bypass involving the aorta and iliac artery is represented by a different route-specific code.
What postoperative care is included in the global period?
The 90-day global includes the day-before preoperative visit and 90 days of related postoperative care.
Can an assistant or co-surgeon be reported?
Assistant-at-surgery services may be paid. Co-surgeon payment requires supporting documentation; team surgery is not permitted.
How are multiple procedures and bilateral reporting handled?
For multiple procedures in the same session, the highest-valued procedure is paid in full and the others at 50%. A bilateral procedure reported with modifier 50 is paid at 150%.
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 35563 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 →