No office rate
This code is for coronary fistula repair with cardiopulmonary bypass; 33500 is the corresponding option when bypass is not used.
On this page
CMS RVU26D · Effective 2026-10-01
33501 Coronary fistula repair Medicare reimbursement rates in Illinois
Reports operative closure of a coronary artery fistula when cardiopulmonary bypass is used to support the patient during the repair. Compare 33501 office and facility rates across CMS payment localities in Illinois.
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 33501 in Illinois?
Illinois has 4 payment localities in this comparison. Use the service location to choose the applicable amount. These are the supported base rates for the 4 payment areas shown below, using the same CMS release.
Office / nonfacility
No supported rate
Facility setting
$1135.69–$1277.87
4 of 4 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.
Where 33501 pays more and less in Illinois
Cardiac surgery
About 33501: Coronary fistula repair with bypass
Reports operative closure of a coronary artery fistula when cardiopulmonary bypass is used to support the patient during the repair.
A coronary artery fistula is an abnormal connection between a coronary artery and a heart chamber or another vessel. For this service, a cardiothoracic surgeon surgically closes the connection while cardiopulmonary bypass supports circulation. The operation is typically performed in a hospital operating room for a patient whose fistula requires open surgical correction; the operative report should identify the fistula’s origin and drainage site and describe its closure.
Choose this code when the fistula repair is performed with cardiopulmonary bypass; code 33500 is the related option when bypass is not used. Documentation should establish the diagnosed fistula, the operative repair, and bypass use. The service has 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 multiple-procedure reduction. Modifier 50 is inappropriate. Assistant-at-surgery payment and co-surgeons are permitted; team surgery is not permitted.
CMS billing rules for 33501
- Global period
- Major surgery with a 90-day global period: the day-before preoperative visit and 90 days of related postoperative care are 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 permitted.
- Team surgery
- Team surgery not permitted.
Where the value comes from
- Work RVU19.02 · 59%
- Practice expense (office) RVU8.62 · 27%
- Malpractice RVU4.55 · 14%
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.
33501 compared with similar codes
Office rates for Illinois, from the same CMS release.
No office rate
This code addresses coronary fistula closure with bypass, while 33502 describes a different coronary artery correction rather than fistula repair.
No office rate
Use this code for coronary fistula repair with bypass, not the distinct coronary artery graft procedure represented by 33503.
Compare 33501 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.
4 of 4 payment localities
Chicago →
Office / nonfacility
Unavailable
Facility
$1277.87
East St. Louis →
Office / nonfacility
Unavailable
Facility
$1206.24
Rest Of Illinois →
Office / nonfacility
Unavailable
Facility
$1135.69
Suburban Chicago →
Office / nonfacility
Unavailable
Facility
$1204.72
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33501 billing questions
How does this code differ from 33500?
Both describe coronary fistula repair. Use 33501 when cardiopulmonary bypass is used for the repair; use 33500 when it is not.
What documentation supports reporting this code?
The operative report should establish the coronary fistula, describe the surgical closure, and document use of cardiopulmonary bypass.
Can modifier 50 be used for a fistula involving both sides?
No. The CMS bilateral adjustment does not apply, and modifier 50 is inappropriate for this service.
How are other procedures in the same session paid?
Under the standard multiple-procedure reduction, the highest-valued procedure is paid in full and other procedures are paid at 50% when performed in the same session.
Can an assistant or co-surgeon be reported?
Assistant-at-surgery payment may be made, and co-surgeons are permitted. Team surgery 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 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.
3,97033478,,Revision of heart chamber,A,,26.85,11.11,NA,11.11,,6.75,44.71,44.71,0,090,0.09,0.84,0.07,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
3,97133496,,Repair prosth valve clot,A,,29.09,11.43,NA,11.43,,6.98,47.50,47.50,0,090,0.09,0.84,0.07,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
3,97233500,,Repair heart vessel fistula,A,,27.24,10.78,NA,10.78,,6.53,44.55,44.55,0,090,0.09,0.84,0.07,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
3,97333501,,Repair heart vessel fistula,A,,19.02,8.62,NA,8.62,,4.55,32.19,32.19,0,090,0.09,0.84,0.07,2,0,2,2,0,9,,33.4009,09,0,99,0.00,0.00,0.00
3,97433502,,Coronary artery correction,A,,21.30,10.02,NA,10.02,,5.36,36.68,36.68,0,090,0.09,0.84,0.07,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
3,97533503,,Coronary artery graft,A,,21.95,10.77,NA,10.77,,5.53,38.25,38.25,0,090,0.09,0.84,0.07,2,0,0,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
3,97633504,,Coronary artery graft,A,,24.82,10.75,NA,10.75,,6.25,41.82,41.82,0,090,0.09,0.84,0.07,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00