CPT code 33883: Aortic extension2026 Medicare rate & RVUs in Oklahoma
Reports later placement of a proximal extension graft to revise a prior endovascular repair of the descending thoracic aorta.
CMS doesn’t publish an office rate for 33883 in Oklahoma.
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 33883 covers
A vascular or cardiothoracic surgeon uses catheter-based techniques to place a graft extension at the proximal end of a prior endovascular repair of the descending thoracic aorta. This may be needed when the original repair requires a longer proximal seal, such as for a persistent endoleak. The procedure is typically performed in an operating room or hybrid suite with imaging used to guide graft positioning.
Report this service for the delayed proximal extension procedure, rather than for the original thoracic endovascular repair or a distal extension. The operative report should identify the prior repair, the reason for extension, its proximal location, and the work performed. CMS assigns a 90-day global period, including the day-before preoperative visit and related postoperative care. When other 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. Assistant-at-surgery payment and co-surgeon billing are permitted; report participating surgeons under the applicable rules rather than as a team surgery.
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.
33883 in Oklahoma
| Payment locality | Office | Facility |
|---|---|---|
| Oklahoma | Unavailable | $909.57 |
How the 33883 rate is calculated
Each of 33883’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 · 33883
RVUs × geographic indexes × conversion factor
Work19.41
19.41 RVUs× 1.000 GPCI
Practice expense4.60
4.60 RVUs× 1.000 GPCI
Malpractice4.78
4.78 RVUs× 1.000 GPCI
Adjusted RVUs
28.7900
Conversion factor
$33.4009
Medicare rate
$961.61
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 33883
33883 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 33883
Aortic extension
| 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 · 33883
Aortic extension
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
33883 without 51 · national facility
$961.61
Aortic extension
33883-51 · Second procedure: 50%
$480.81
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%).
33883 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 33880Thoracic endovascular repair
- 33880 describes the initial endovascular repair involving coverage of the left subclavian artery origin. This code is for a later proximal extension to a prior repair.
- 33881Thoracic endograft
- 33881 describes the initial endovascular repair without coverage of the left subclavian artery origin. Use this code for the subsequent proximal extension procedure.
- 33886Aortic extension
- Both concern delayed extension placement after a prior thoracic endovascular repair. Choose this code for a proximal extension and 33886 for a distal extension.
33883 billing questions
How is this different from the original thoracic endovascular repair?
This code is for a later procedure that adds a proximal extension to a previous descending thoracic aortic repair. Codes 33880 and 33881 describe initial endovascular repair services.
When should the distal extension code be considered instead?
Use 33886 when the delayed graft extension is placed at the distal end of the prior repair. This code identifies proximal extension placement.
What documentation supports reporting this service?
Document the prior endovascular repair, the reason for the later extension, the proximal graft location, and the procedure performed. The operative report should distinguish the extension from the original repair.
What postoperative care is included in the global period?
The 90-day global period includes the day-before preoperative visit and 90 days of related postoperative care.
How are other procedures handled when performed in the same session?
CMS pays the highest-valued procedure in full and applies the standard multiple-procedure reduction to the other procedures performed in that session.
Can an assistant or co-surgeon be reported?
Assistant-at-surgery payment and co-surgeon billing are permitted for this service. Multiple surgeons should be reported under the applicable assistant or co-surgeon rules, not as a team surgery.
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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