CPT code 33415: Subaortic resection, discrete subaortic stenosis2026 Medicare rate & RVUs in Texas
Open-heart resection of obstructing tissue beneath the aortic valve treats discrete subaortic stenosis and is performed with cardiopulmonary bypass.
CMS doesn’t publish an office rate for 33415 in Texas.
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 33415 covers
This operation removes tissue beneath the aortic valve that creates a discrete obstruction to blood leaving the left ventricle. A cardiac surgeon performs it through an open-heart approach with cardiopulmonary bypass. The service can include septal muscle removal when needed as part of treating the subaortic obstruction. It is distinct from an operation directed at repairing or replacing the aortic valve itself.
Report 33415 when the operative target is subvalvular tissue causing discrete subaortic stenosis. The operative report should identify the obstructing tissue and describe its resection and use of bypass. CMS 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% multiple-procedure reduction. Assistant-at-surgery payment may be made; co-surgeon payment requires supporting documentation. Team surgery payment 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 33415 pays more and less in Texas
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
8 of 8 payment localities
| Payment locality | Office | Facility |
|---|---|---|
| Austin, TX | Unavailable | $1,894.95 |
| Beaumont, TX | Unavailable | $1,847.76 |
| Brazoria, TX | Unavailable | $1,844.25 |
| Dallas, TX | Unavailable | $1,870.86 |
| Fort Worth, TX | Unavailable | $1,870.87 |
| Galveston, TX | Unavailable | $1,859.46 |
| Houston, TX | Unavailable | $2,024.20 |
| Rest of Texas | Unavailable | $1,855.15 |
How the 33415 rate is calculated
Each of 33415’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 · 33415
RVUs × geographic indexes × conversion factor
Work36.34
36.34 RVUs× 1.000 GPCI
Practice expense11.67
11.67 RVUs× 1.000 GPCI
Malpractice9.00
9.00 RVUs× 1.000 GPCI
Adjusted RVUs
57.0100
Conversion factor
$33.4009
Medicare rate
$1,904.19
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 33415
33415 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 33415
Subaortic resection, discrete subaortic stenosis
| 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) | 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 · 33415
Subaortic resection, discrete subaortic stenosis
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
33415 without 51 · national facility
$1,904.19
Subaortic resection, discrete subaortic stenosis
33415-51 · Second procedure: 50%
$952.10
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%).
33415 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 33416Septal myectomyVentricular muscle resection
- 33415 treats discrete obstructing tissue below the aortic valve. 33416 targets ventricular septal muscle in hypertrophic subaortic obstruction.
- 33414Aortic valve repairNative valve reconstruction
- 33414 is directed at repairing the aortic valve itself; 33415 removes obstructing tissue below the valve.
- 33405Aortic valve replacementStandard prosthetic valve
- 33405 replaces the aortic valve. 33415 treats subvalvular obstruction without describing valve replacement.
33415 billing questions
How do I distinguish 33415 from 33416?
Use 33415 for removal of discrete obstructing tissue beneath the aortic valve. Code 33416 describes ventricular septal muscle resection for hypertrophic subaortic obstruction.
Does 33415 include myectomy?
The service may include myectomy when it is part of resecting tissue for discrete subaortic stenosis. The operative report should show the subvalvular obstruction being treated.
Is aortic valve repair or replacement included?
33415 addresses tissue below the valve, not repair or replacement of the valve. A separate valve procedure may be reported when independently performed for coexisting valve disease.
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 multiple 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.
Can an assistant or co-surgeon be reported?
Assistant-at-surgery payment may be made. Co-surgeon payment requires supporting documentation; team surgery payment is not permitted.
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
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