No office rate
33741 is for transcatheter atrial septostomy. 33745 is for transcatheter treatment involving creation of a congenital cardiac shunt.
On this page
CMS RVU26D · Effective 2026-10-01
33741 Atrial septostomy Medicare reimbursement rates in Washington
Reports catheter-based creation or enlargement of an atrial communication to address a congenital cardiac anomaly, such as inadequate mixing in transposition of the great arteries. Compare 33741 office and facility rates across CMS payment localities in Washington.
Amounts below use the non-QP conversion factor for participating physicians. These are base physician payments before claim-level adjustments, not patient costs or total hospital charges.
What does Medicare pay for 33741 in Washington?
Washington has 2 payment localities in this comparison. Use the service location to choose the applicable amount. These are the supported base rates for the 2 payment areas shown below, using the same CMS release.
Office / nonfacility
No supported rate
Facility setting
$634.05–$671.78
2 of 2 localities have a supported rate.
These are locality ranges, not averages or address-specific quotes. A facility-setting amount covers the physician service; it does not include a hospital’s separate bill. Choose a locality below to inspect its calculation, compare other payment areas, or price a percentage of Medicare.
Congenital cardiology
About 33741: Transcatheter atrial septostomy
Reports catheter-based creation or enlargement of an atrial communication to address a congenital cardiac anomaly, such as inadequate mixing in transposition of the great arteries.
A congenital interventional cardiologist performs this catheter-based procedure to create or enlarge an opening between the atria when a congenital heart defect makes that communication clinically necessary. A classic setting is transposition of the great arteries with inadequate mixing between the pulmonary and systemic circulations. The procedure is performed in a cardiac catheterization setting; imaging guidance, when performed, is included in the service.
Report 33741 for the atrial septostomy itself, rather than for creation of a different type of congenital cardiac shunt. The operative or catheterization report should identify the congenital anomaly, the atrial communication treated, and the intervention performed. The code has a 0-day global period, so same-day preoperative and postoperative care is included. When multiple procedures occur in the same session, the highest-valued procedure is paid in full and other procedures are subject to the standard multiple-procedure reduction. Modifier 50 is inappropriate for this service. An assistant at surgery may be paid; co-surgeons and team surgery are not permitted.
CMS billing rules for 33741
- Global period
- Minor procedure with a 0-day global period: same-day preoperative and postoperative care is included.
- Multiple procedures
- Standard multiple procedure reduction: the highest-valued procedure is paid in full and others at 50% when performed in the same session.
- Bilateral procedures
- Bilateral adjustment does not apply; the descriptor or anatomy makes modifier 50 inappropriate.
- Assistant at surgery
- Assistant at surgery may be paid.
- Co-surgeons
- Co-surgeons not permitted.
- Team surgery
- Team surgery not permitted.
Where the value comes from
- Work RVU13.65 · 70%
- Practice expense (office) RVU2.54 · 13%
- Malpractice RVU3.26 · 17%
45
Medicare services in 2024 · #5418 by national volume
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.
33741 compared with similar codes
Office rates for Washington, from the same CMS release.
No office rate
33746 describes additional congenital cardiac shunt treatment. It is not an additional-unit code for atrial septostomy under 33741.
Compare 33741 by payment locality
Find the payment area for your service address, then open its rate page for calculation inputs, release history and the percentage-of-Medicare tool. A city may cross payment-area boundaries; the ZIP lookup above helps resolve the location.
2 of 2 payment localities
Rest Of Washington →
Office / nonfacility
Unavailable
Facility
$634.05
Seattle (King Cnty) →
Office / nonfacility
Unavailable
Facility
$671.78
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33741 billing questions
When should 33741 be reported instead of 33745?
Use 33741 for transcatheter atrial septostomy addressing a congenital cardiac anomaly. Code 33745 describes treatment involving creation of a congenital cardiac shunt, rather than an atrial septostomy.
Is imaging guidance separately reported with 33741?
Imaging guidance performed as part of the atrial septostomy is included in 33741.
Does 33741 have a postoperative global period?
It has a 0-day global period. Same-day preoperative and postoperative care is included.
Can modifier 50 be used?
No. Modifier 50 is inappropriate for this service based on its descriptor and anatomy.
Can an assistant or co-surgeon be reported?
An assistant at surgery may be paid. Co-surgeons and team surgery are not permitted for 33741.
How are other procedures in the same session paid?
The highest-valued procedure is paid in full, and other procedures performed in the same session 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 indices and the applicable conversion factor. Unavailable or separately priced services are labeled rather than assigned a made-up amount.
Source: RVU26D. Effective 2026-10-01 through the day before 2027-01-01.
4,04533732,,Repair heart-vein defect,A,,28.24,11.42,NA,11.42,,7.11,46.77,46.77,0,090,0.09,0.84,0.07,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
4,04633735,,Revision of heart chamber,A,,21.65,10.12,NA,10.12,,5.45,37.22,37.22,0,090,0.09,0.84,0.07,2,0,2,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
4,04733736,,Revision of heart chamber,A,,23.71,10.53,NA,10.53,,5.98,40.22,40.22,0,090,0.09,0.84,0.07,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
4,04833741,,Tas congenital car anomal,A,,13.65,2.54,NA,2.54,,3.26,19.45,19.45,0,000,0.00,0.00,0.00,2,0,2,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
4,04933745,,Tis cgen car anomal 1st shnt,A,,19.50,3.64,NA,3.64,,4.68,27.82,27.82,0,000,0.00,0.00,0.00,2,0,2,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
4,05033746,,Tis cgen car anomal ea addl,A,,7.80,1.45,NA,1.45,,1.86,11.11,11.11,0,ZZZ,0.00,0.00,0.00,0,0,2,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
4,0513374F,,Ajcc brst cncr stage 1 docd,I,,0.00,0.00,,0.00,,0.00,0.00,0.00,9,XXX,0.00,0.00,0.00,9,9,9,9,9,9,,33.4009,09,0,99,0.00,0.00,0.00