FeeBase
Log inGet started
Menu

CPT code 33777: TGA repair, atrial baffle, subpulmonary obstruction2026 Medicare rate & RVUs

Reports transposition of the great arteries repair using an atrial baffle together with operative relief of subpulmonary obstruction.

CMS RVU26DEffective Oct 1, 2026109 payment localities

Medicare pays $1,767.58 for 33777 nationally in a facility.

Medicare rate · 33777

TGA repair, atrial baffle, subpulmonary obstruction

Office or facility?

Work RVUs
33.32
Total RVUs
52.92
Global days
090

National rate · 2026

$1,767.58

Facility setting, before claim adjustments.

See every locality for 33777 →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 33777 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 33777 covers

This code describes repair of transposition of the great arteries using an atrial baffle to redirect venous blood, combined with surgical relief of obstruction below the pulmonary valve. The baffle approach is associated with Mustard- or Senning-type repairs. A congenital cardiac surgeon typically performs this open-heart operation in an operating room, often as part of complex congenital heart surgery.

Report the code when the operative record supports both the atrial baffle repair and treatment of subpulmonary obstruction; an atrial baffle alone does not capture the added obstruction repair. Documentation should identify the transposition repair method, the baffle work, and the obstructing anatomy and corrective work. 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. Modifier 50 is inappropriate. Assistant-at-surgery payment may be made; co-surgeons and team surgery are 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 33777 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

33777 office and facility rates by payment locality
Payment localityOfficeFacility
AlabamaUnavailable$1,599.15
AlaskaUnavailable$2,222.55
ArizonaUnavailable$1,715.61
ArkansasUnavailable$1,578.87
Atlanta, GAUnavailable$1,833.23
Austin, TXUnavailable$1,759.57
Bakersfield, CAUnavailable$1,715.09
Baltimore area, MDUnavailable$1,879.13
Beaumont, TXUnavailable$1,713.98
Brazoria, TXUnavailable$1,711.46

33777 rates by state

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

MEWIVTNHMTNDMNMINYMARIWAIDWYSDIAILINOHPANJCTORNVUTCONEMOKYWVVAMDDECAAZNMKSOKARTNNCSCDCTXLAMSALGAFLAKHI

Explore a state

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
33777 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 33777 rate is calculated

Each of 33777’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 · 33777

RVUs × geographic indexes × conversion factor

Office or facility?

Work33.32

33.32 RVUs× 1.000 GPCI

Practice expense11.21

11.21 RVUs× 1.000 GPCI

Malpractice8.39

8.39 RVUs× 1.000 GPCI

Adjusted RVUs

52.9200

Conversion factor

$33.4009

Medicare rate

$1,767.58

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

Payment rules and modifiers for 33777

33777 has a 90-day global period: related visits in that window are included in the surgery payment.

CMS payment indicators · 33777

TGA repair, atrial baffle, subpulmonary obstruction

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)0Not permitted.
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 · 33777

TGA repair, atrial baffle, subpulmonary obstruction

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

33777 without 51 · national facility

$1,767.58

TGA repair, atrial baffle, subpulmonary obstruction

33777-51 · Second procedure: 50%

$883.79

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

33777 compared with similar codes

Compare codes · National

5 codes, side by side

Office or facility?

  • 33777

    TGA repair, atrial baffle, subpulmonary obstruction33.32 wRVU

    Not priced

  • 33774

    Atrial baffle repair, transposition of great arteries30.94 wRVU

    Not priced

  • 33776

    Atrial switch repair, with VSD closure33.88 wRVU

    Not priced

  • 33781

    Transposition repair, subpulmonary obstruction repair42.13 wRVU

    Not priced

  • 33778

    Arterial switch repair, aortic and pulmonary reconstruction41.68 wRVU

    Not priced

How to choose

33774Atrial baffle repairTransposition of great arteries
Both describe transposition repair using an atrial baffle. This code also requires repair of subpulmonary obstruction.
33776Atrial switch repairWith VSD closure
33776 identifies an atrial-baffle repair with ventricular septal defect closure; this code identifies repair of subpulmonary obstruction.
33781Transposition repairSubpulmonary obstruction repair
Both include repair of subpulmonary obstruction, but 33781 uses a reconstruction approach rather than an atrial-baffle approach.
33778Arterial switch repairAortic and pulmonary reconstruction
33778 describes transposition repair with aortic and pulmonary artery reconstruction. This code describes an atrial-baffle repair with subpulmonary obstruction relief.

Codes related to 33777

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

Codes related to 33777
CodeHow it relatesNational office range
Same family
33774Atrial baffle repair, transposition of great arteriesAtrial-baffle transposition repair without the specified subpulmonary obstruction repair.No office rate
33775Atrial switch repair, with pulmonary band removalAtrial-baffle transposition repair involving pulmonary artery band removal.No office rate
33776Atrial switch repair, with VSD closureAtrial-baffle transposition repair with ventricular septal defect closure.No office rate
Used instead
33778Arterial switch repair, aortic and pulmonary reconstructionTransposition repair using aortic and pulmonary artery reconstruction rather than an atrial-baffle approach.No office rate
33781Transposition repair, subpulmonary obstruction repairReconstruction approach to transposition repair with subpulmonary obstruction repair.No office rate

33777 billing questions

How does this differ from 33774?

33774 describes a transposition repair using an atrial baffle. Use 33777 when the operation also includes surgical relief of subpulmonary obstruction.

Is the atrial baffle separately reported?

The baffle work is part of this combined repair. The operative documentation should support both the baffle procedure and the subpulmonary obstruction repair.

Can modifier 50 be reported?

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

Can an assistant surgeon be paid?

CMS indicates that assistant-at-surgery payment may be made. Co-surgeons and team surgery are not permitted 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.

What happens 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.

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 33777PPRRVU2026_Oct_nonQPP.csv, line 4,065 (RVU26D)

Open CMS sourceHow we calculate rates

Did this answer your question about what 33777 pays?

Tell us what you were actually trying to work out. We’ll answer you directly, or build the page that does.

Fee sheets · Coming soon

Put 33777 and the rest of your codes on one sheet

Your codes at your locality, with payer contracts beside Medicare.

Join the waitlist