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Billing code 33775: Atrial switch repairMedicare rate & RVUs

Reports surgical repair of transposition of the great arteries using an atrial baffle, when a previously placed pulmonary artery band is also removed.

CMS RVU26DEffective Oct 1, 2026109 payment localities

Medicare pays $1,746.87 for 33775 nationally in a facility.

Medicare rate · 33775

Atrial switch repair

Swap in your local Medicare rate.

Work RVUs
32.17
Total RVUs
52.30
Global days
090

National rate · 2026

$1,746.87

Facility setting, before claim adjustments.

See every locality for 33775 → · 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.

On this page 10 sections
  1. Medicare rate
  2. What 33775 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 33775 covers

A congenital heart surgeon reports this code for an atrial-switch repair of transposition of the great arteries that includes taking off a pulmonary artery band placed during earlier treatment. The operation redirects blood flow at the atrial level and removes the band during the same surgical session. It is performed in an operating room, generally as major open-heart surgery for congenital heart disease.

Choose this code when the operative report supports both the atrial baffle repair and pulmonary artery band removal; the band removal is part of this service, not a separate reason to select the code. Document the underlying anatomy, the baffle work, and removal of the prior band. CMS assigns a 90-day global period, including the day-before preoperative visit and 90 days of 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. An assistant at surgery may be paid; co-surgeons and team surgery are not permitted. Modifier 50 is inappropriate for this code.

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 33775 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

33775 office and facility rates by payment locality
Payment localityOfficeFacility
AlabamaUnavailable$1,579.12
Alaska*Unavailable$2,188.59
ArizonaUnavailable$1,695.41
ArkansasUnavailable$1,558.88
AtlantaUnavailable$1,810.96
AustinUnavailable$1,741.42
BakersfieldUnavailable$1,699.91
Baltimore/Surr. CntysUnavailable$1,857.57
BeaumontUnavailable$1,691.50
BrazoriaUnavailable$1,692.26

33775 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
33775 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 33775 rate is calculated

Each of 33775’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 · 33775

RVUs × geographic indexes × conversion factor

Swap in your local Medicare rate.

Work 32.17Practice expense 12.02Malpractice 8.11

52.3000 adjusted RVUs×$33.4009 conversion factor=$1,746.87

All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.

Payment rules and modifiers for 33775

33775 has a 90-day global period: related visits in that window are included in the surgery payment.

CMS payment indicators · 33775

Atrial switch repair

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 · 33775

Atrial switch repair

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.

  • 24 Unrelated E/M visit by the same physician
  • 79 Unrelated procedure (starts its own global period)
  • 58 Staged, more extensive, or therapy procedure that was planned
  • 78 Unplanned 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

33775 without 51 · national facility

$1,746.87

Atrial switch repair

33775-51 · Second procedure: 50%

$873.44

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

33775 compared with similar codes

Compare codes

33775 vs 33774 vs 33776 vs 33777 vs 33779: national Medicare rates

Swap in your local Medicare rate.

  • 33775
    Atrial switch repair · 32.17 wRVU
    —
  • 33774
    Atrial baffle repair · 30.94 wRVU
    —
  • 33776
    Atrial switch repair · 33.88 wRVU
    —
  • 33777
    TGA repair · 33.32 wRVU
    —
  • 33779
    Arterial switch repair · 42.15 wRVU
    —

How to choose

33774Atrial baffle repair
Both describe an atrial-baffle repair for transposition. Choose 33775 when removal of a pulmonary artery band is included in the operation.
33776Atrial switch repair
This code identifies an atrial-baffle repair that includes ventricular septal defect closure; 33775 is distinguished by pulmonary artery band removal.
33777TGA repair
This code includes repair of subpulmonic obstruction with the atrial-baffle repair. Code 33775 identifies the repair with pulmonary band removal.
33779Arterial switch repair
This is a transposition repair involving reconstruction and pulmonary band removal, rather than the atrial-baffle approach represented by 33775.

Codes related to 33775

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

Codes related to 33775
CodeHow it relatesNational office range
Same family
33774Atrial baffle repairAtrial-baffle repair of transposition without the pulmonary-band-removal distinction.No office rate
33776Atrial switch repairAtrial-baffle repair in which ventricular septal defect closure is also part of the repair.No office rate
33777TGA repairAtrial-baffle repair that also addresses subpulmonic obstruction.No office rate
Used instead
33779Arterial switch repairA transposition repair involving reconstruction and pulmonary band removal rather than this atrial-baffle approach.No office rate
33770TGA repairA different transposition repair pathway, without surgical enlargement of a ventricular septal defect.No office rate
33771TGA repairA different transposition repair pathway that includes surgical enlargement of a ventricular septal defect.No office rate

33775 billing questions

How does this differ from 33774?

Use 33775 when the atrial-baffle repair also includes removal of a pulmonary artery band. Code 33774 describes the atrial-baffle repair without that band-removal distinction.

Is pulmonary artery band removal separately reported?

The band removal is included in this repair when performed as part of the same operation. Document it in the operative report as part of the service.

What documentation supports choosing this code?

The operative report should identify the transposition repair, atrial baffle work, and removal of a previously placed pulmonary artery band.

Can modifier 50 be appended?

No. CMS identifies bilateral adjustment as inappropriate for this code because of its descriptor and anatomy.

How are other 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. The code has a 90-day global period.

Can an assistant or co-surgeon be reported?

An assistant at surgery may be paid. Co-surgeons and team surgery are not permitted for this code.

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 33775PPRRVU2026_Oct_nonQPP.csv, line 4,063 (RVU26D)

Open CMS sourceHow we calculate rates

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