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CPT code 33771: TGA repair, with surgical VSD enlargement2026 Medicare rate & RVUs

Open repair of transposition of the great arteries with surgical enlargement of a ventricular septal defect when enlargement is part of the repair.

CMS RVU26DEffective Oct 1, 2026109 payment localities

Medicare pays $2,004.72 for 33771 nationally in a facility.

Medicare rate · 33771

TGA repair, with surgical VSD enlargement

Office or facility?

Work RVUs
39.61
Total RVUs
60.02
Global days
090

National rate · 2026

$2,004.72

Facility setting, before claim adjustments.

See every locality for 33771 →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 33771 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 33771 covers

This operation repairs transposition of the great arteries in a patient who also has a ventricular septal defect, with the surgeon surgically enlarging the defect as part of the repair. It is performed by a congenital cardiac surgeon, typically in an operating room with cardiopulmonary bypass, for congenital heart disease requiring this repair strategy. The operative report should identify the transposition and VSD and describe the enlargement performed during the repair.

Report this code when surgical enlargement of the VSD is performed as part of the transposition repair; use 33770 when the repair does not include that enlargement. CMS assigns a 90-day global period, including the day-before preoperative visit and 90 days of related postoperative care. For multiple procedures in one 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; co-surgeon payment requires 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 33771 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

33771 office and facility rates by payment locality
Payment localityOfficeFacility
AlabamaUnavailable$1,816.09
AlaskaUnavailable$2,538.51
ArizonaUnavailable$1,945.77
ArkansasUnavailable$1,793.47
Atlanta, GAUnavailable$2,081.51
Austin, TXUnavailable$1,989.34
Bakersfield, CAUnavailable$1,932.32
Baltimore area, MDUnavailable$2,130.54
Beaumont, TXUnavailable$1,949.73
Brazoria, TXUnavailable$1,938.55

33771 rates by state

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

MEWIVTNHMTNDMNMINYMARIWAIDWYSDIAILINOHPANJCTORNVUTCONEMOKYWVVAMDDECAAZNMKSOKARTNNCSCDCTXLAMSALGAFLAKHI

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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
33771 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 33771 rate is calculated

Each of 33771’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 · 33771

RVUs × geographic indexes × conversion factor

Office or facility?

Work39.61

39.61 RVUs× 1.000 GPCI

Practice expense10.39

10.39 RVUs× 1.000 GPCI

Malpractice10.02

10.02 RVUs× 1.000 GPCI

Adjusted RVUs

60.0200

Conversion factor

$33.4009

Medicare rate

$2,004.72

Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.

Payment rules and modifiers for 33771

33771 has a 90-day global period: related visits in that window are included in the surgery payment.

CMS payment indicators · 33771

TGA repair, with surgical VSD enlargement

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 · 33771

TGA repair, with surgical VSD enlargement

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

33771 without 51 · national facility

$2,004.72

TGA repair, with surgical VSD enlargement

33771-51 · Second procedure: 50%

$1,002.36

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

33771 compared with similar codes

Compare codes · National

4 codes, side by side

Office or facility?

  • 33771

    TGA repair, with surgical VSD enlargement39.61 wRVU

    Not priced

  • 33770

    TGA repair, VSD not enlarged38.09 wRVU

    Not priced

  • 33774

    Atrial baffle repair, transposition of great arteries30.94 wRVU

    Not priced

  • 33782

    Nikaidoh repair, without coronary ostia reimplantation58.58 wRVU

    Not priced

How to choose

33770TGA repairVSD not enlarged
Choose 33771 when surgical enlargement of the VSD is part of the transposition repair. Choose 33770 when the repair is performed without that enlargement.
33774Atrial baffle repairTransposition of great arteries
33774 describes transposition repair using an atrial baffle procedure. It is not the code for a repair that includes surgical VSD enlargement.
33782Nikaidoh repairWithout coronary ostia reimplantation
33782 identifies a Nikaidoh procedure. Use 33771 when the documented operation is transposition repair with surgical VSD enlargement rather than that distinct approach.

Codes related to 33771

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

Codes related to 33771
CodeHow it relatesNational office range
Same family
33770TGA repair, VSD not enlargedTransposition repair in the same code family, without surgical VSD enlargement.No office rate
33780Transposition repair, outflow reconstruction and VSD closureTransposition repair code in the reconstruction and VSD-closure group.No office rate
Used instead
33774Atrial baffle repair, transposition of great arteriesTransposition repair using an atrial baffle approach.No office rate
33782Nikaidoh repair, without coronary ostia reimplantationNikaidoh procedure, a different surgical approach for selected transposition anatomy.No office rate

33771 billing questions

How does 33771 differ from 33770?

33771 is for transposition repair that includes surgical enlargement of the VSD. Use 33770 for the corresponding repair without that enlargement.

Should the VSD enlargement be reported separately?

The enlargement is part of the repair represented by 33771. The operative report should make clear that it was performed as part of the transposition repair.

What documentation supports 33771?

Document the transposition, the VSD, and the surgical enlargement performed during the repair. The operative report should distinguish this work from a repair without VSD enlargement.

Can an assistant or co-surgeon be reported?

An assistant at surgery may be paid. Co-surgeon payment requires supporting documentation; team surgery is not permitted.

How does the multiple-procedure reduction affect 33771?

When multiple procedures are performed in the same session, the highest-valued procedure is paid in full and the others are subject to the standard 50% reduction.

Should modifier 50 be appended?

No. The bilateral adjustment does not apply to this code, and modifier 50 is inappropriate.

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 33771PPRRVU2026_Oct_nonQPP.csv, line 4,061 (RVU26D)

Open CMS sourceHow we calculate rates

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