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CPT code 33415: Subaortic resection, discrete subaortic stenosis2026 Medicare rate & RVUs

Open-heart resection of obstructing tissue beneath the aortic valve treats discrete subaortic stenosis and is performed with cardiopulmonary bypass.

CMS RVU26DEffective Oct 1, 2026109 payment localities109 Medicare services in 2024

Medicare pays $1,904.19 for 33415 nationally in a facility.

Medicare rate · 33415

Subaortic resection, discrete subaortic stenosis

Office or facility?

Work RVUs
36.34
Total RVUs
57.01
Global days
090

National rate · 2026

$1,904.19

Facility setting, before claim adjustments.

See every locality for 33415 →Billed by an NP, PA or therapist? →

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

Your location

Medicare pays by the payment locality where the service is performed.

On this page 10 sections
  1. Medicare rate
  2. What 33415 covers
  3. By payment locality
  4. Rate map
  5. How it’s calculated
  6. Payment rules
  7. Similar codes
  8. Related codes
  9. Billing questions
  10. Sources

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

The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.

109 of 109 payment localities

33415 office and facility rates by payment locality
Payment localityOfficeFacility
AlabamaUnavailable$1,725.00
AlaskaUnavailable$2,401.44
ArizonaUnavailable$1,848.81
ArkansasUnavailable$1,703.43
Atlanta, GAUnavailable$1,974.49
Austin, TXUnavailable$1,894.95
Bakersfield, CAUnavailable$1,847.13
Baltimore area, MDUnavailable$2,023.30
Beaumont, TXUnavailable$1,847.76
Brazoria, TXUnavailable$1,844.25

33415 rates by state

Office rate range in each state. Select a state to see its payment localities.

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Local rates. Clear comparisons.

Hover or focus a tile to see its rate range. Select it to open the state’s fee schedule.

View every state and territory as a table
33415 office rate range by state
State / territoryOffice rate rangeLocalities
AKNo published base rate1
ALNo published base rate1
ARNo published base rate1
AZNo published base rate1
CANo published base rate29
CONo published base rate1
CTNo published base rate1
DCNo published base rate1
DENo published base rate1
FLNo published base rate3
GANo published base rate2
GUNo published base rate1
HINo published base rate1
IANo published base rate1
IDNo published base rate1
ILNo published base rate4
INNo published base rate1
KSNo published base rate1
KYNo published base rate1
LANo published base rate2
MANo published base rate2
MDNo published base rate3
MENo published base rate2
MINo published base rate2
MNNo published base rate1
MONo published base rate3
MSNo published base rate1
MTNo published base rate1
NCNo published base rate1
NDNo published base rate1
NENo published base rate1
NHNo published base rate1
NJNo published base rate2
NMNo published base rate1
NVNo published base rate1
NYNo published base rate5
OHNo published base rate1
OKNo published base rate1
ORNo published base rate2
PANo published base rate2
PRNo published base rate1
RINo published base rate1
SCNo published base rate1
SDNo published base rate1
TNNo published base rate1
TXNo published base rate8
UTNo published base rate1
VANo published base rate2
VINo published base rate1
VTNo published base rate1
WANo published base rate2
WINo published base rate1
WVNo published base rate1
WYNo published base rate1

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

Office or facility?

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

RuleCMS valueWhat it means
Global period090Major surgery: the day before, the day of, and 90 days after are included.
Multiple procedures2Standard reduction: highest-valued procedure at 100%, others at 50%.
Bilateral (modifier 50)0The 150% bilateral adjustment doesn’t apply.
Assistant at surgery (80/81/82/AS)2Paid.
Co-surgeons (62)1Permitted with supporting documentation.
Team surgery (66)0Not permitted.
Professional/technical0Physician service: no professional/technical split.
Split (54/55/56)0.09/0.84/0.07Share 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.

  • 24Unrelated E/M visit by the same physician
  • 79Unrelated procedure (starts its own global period)
  • 58Staged, more extensive, or therapy procedure that was planned
  • 78Unplanned return to the operating room for a related complication
SurgeryVisit
Sep 23, 2026Jan 10, 2027

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%).

When to use modifier 51

33415 compared with similar codes

Compare codes · National

4 codes, side by side

Office or facility?

  • 33415

    Subaortic resection, discrete subaortic stenosis36.34 wRVU

    Not priced

  • 33416

    Septal myectomy, ventricular muscle resection35.65 wRVU

    Not priced

  • 33414

    Aortic valve repair, native valve reconstruction38.39 wRVU

    Not priced

  • 33405

    Aortic valve replacement, standard prosthetic valve40.29 wRVU

    Not priced

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.

Codes related to 33415

Related codes aren’t interchangeable: bill the code that matches the service performed.

Codes related to 33415
CodeHow it relatesNational office range
Used instead
33416Septal myectomy, ventricular muscle resectionFor ventricular septal muscle resection addressing hypertrophic subaortic obstruction rather than discrete subaortic tissue.No office rate
Often billed with
33414Aortic valve repair, native valve reconstructionMay be reported with aortic valve repair when a separate valve lesion is also treated.No office rate
33405Aortic valve replacement, standard prosthetic valveMay accompany aortic valve replacement when coexisting valve disease is separately treated.No office rate

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

Show the CMS file lines behind this rate
RVUs for 33415PPRRVU2026_Oct_nonQPP.csv, line 3,944 (RVU26D)

Open CMS sourceHow we calculate rates

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