Billing code 34830: Open aortic repairMedicare rate & RVUs in Illinois
Open conversion of a previously endovascularly treated aorta with replacement using a straight tube graft is reported when the operative repair uses that graft configuration.
CMS doesn’t publish an office rate for 34830 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.
On this page 9 sections
What 34830 covers
This service covers open reconstruction of an aortic segment using a straight tube prosthesis after prior endovascular repair. A vascular surgeon performs the operation in a hospital operating room, exposing the aorta and replacing or reconstructing the affected segment. The procedure may involve addressing the existing endograft as part of the open repair; report this code when the documented reconstruction uses a tube graft rather than an aortoiliac or aortofemoral configuration.
Select the code from the operative report’s description of the prior endovascular repair, the open reconstruction, and the prosthesis configuration. Documentation should support why open repair was needed and identify the graft used. Medicare assigns a 90-day global period, including 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 50% reduction. Modifier 50 is inappropriate. An assistant at surgery may be paid, and co-surgeons are permitted; 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 34830 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 | Unavailable | $1,990.28 |
| East St. Louis | Unavailable | $1,886.12 |
| Rest Of Illinois | Unavailable | $1,752.58 |
| Suburban Chicago | Unavailable | $1,840.25 |
How the 34830 rate is calculated
Each of 34830’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 · 34830
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 34.35Practice expense 4.80Malpractice 8.79
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 34830
34830 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 34830
Open aortic repair
| 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) | 2 | 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 · 34830
Open aortic repair
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
34830 without 51 · national facility
$1,601.24
Open aortic repair
34830-51 · Second procedure: 50%
$800.62
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%).
34830 compared with similar codes
Compare codes
34830 vs 34831 vs 34832 vs 35081: national Medicare rates
Swap in your local Medicare rate.
How to choose
- 34831Aortic graft repair
- Use 34831 when the open reconstruction after endovascular repair uses an aortoiliac prosthesis; 34830 is for a tube prosthesis.
- 34832Aortic aneurysm repair
- Use 34832 when the open reconstruction uses an aortofemoral prosthesis. The graft configuration distinguishes it from 34830.
- 35081Aortic aneurysm repair
- 35081 describes a different open abdominal aortic aneurysm repair service. For 34830, the record should support open reconstruction following endovascular repair and use of a tube prosthesis.
34830 billing questions
When is 34830 selected instead of 34831 or 34832?
Select 34830 when the open reconstruction after endovascular repair uses a straight tube graft. Codes 34831 and 34832 distinguish aortoiliac and aortofemoral graft configurations.
How does 34830 differ from 35081?
34830 applies to open aortic reconstruction following endovascular repair, with a tube prosthesis. 35081 describes a different open abdominal aortic aneurysm repair service; use the code supported by the operative circumstances and procedure performed.
Can an assistant surgeon or co-surgeon be reported?
CMS permits payment for an assistant at surgery and permits co-surgeons for 34830. Team surgery is not permitted.
Does modifier 50 apply to this procedure?
No. CMS identifies bilateral adjustment as inappropriate for this code.
What postoperative care is included?
The 90-day global period includes the day-before preoperative visit and 90 days of related postoperative care.
How are other procedures in the same session paid?
The highest-valued procedure is paid in full, and other procedures are subject to the standard multiple-procedure reduction.
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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