No office rate
33425 describes a mitral valve repair without a prosthetic ring. This code is used for the congenital repair service; follow the operative details and the applicable code descriptor.
On this page
CMS RVU26D · Effective 2026-10-01
33427 Mitral valve repair Medicare reimbursement rates in Michigan
Open surgical repair of a congenitally abnormal mitral valve is reported when the surgeon reconstructs the valve during an operation using cardiopulmonary bypass. Compare 33427 office and facility rates across CMS payment localities in Michigan.
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 33427 in Michigan?
Michigan 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
$2278.33–$2497.90
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.
Cardiac surgery
About 33427: Congenital mitral valve repair
Open surgical repair of a congenitally abnormal mitral valve is reported when the surgeon reconstructs the valve during an operation using cardiopulmonary bypass.
This code represents open surgical repair of a congenitally abnormal mitral valve during an operation using cardiopulmonary bypass. A cardiac surgeon may reconstruct the valve to address congenital leaflet or supporting-structure abnormalities while preserving the patient's native valve. The service is typically performed in a hospital operating room for patients with congenital mitral valve disease; it is distinct from transcatheter repair and valve replacement.
Select the code based on the operation actually performed and documentation identifying the congenital mitral valve problem and repair. The operative report should describe the valve reconstruction and use of bypass. This major surgery includes 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. An assistant at surgery may be paid; co-surgeon payment requires supporting documentation, and team surgery is not permitted. Report one service for the mitral repair; modifier 50 is not appropriate.
CMS billing rules for 33427
- 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 paid only with supporting documentation.
- Team surgery
- Team surgery not permitted.
Where the value comes from
- Work RVU43.71 · 64%
- Practice expense (office) RVU13.84 · 20%
- Malpractice RVU10.51 · 15%
4.5K
Medicare services in 2024 · #1952 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.
33427 compared with similar codes
Office rates for Michigan, from the same CMS release.
No office rate
33426 describes mitral valve repair with a prosthetic ring. Do not choose it solely because a ring is present unless the documented operation matches that code's descriptor.
No office rate
33418 is a transcatheter mitral repair, while this code represents open surgical repair using cardiopulmonary bypass.
No office rate
33430 is reported when the mitral valve is replaced. This code is for repair that reconstructs the native valve.
Compare 33427 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
Detroit →
Office / nonfacility
Unavailable
Facility
$2497.90
Rest Of Michigan →
Office / nonfacility
Unavailable
Facility
$2278.33
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33427 billing questions
How is this code distinguished from 33425 and 33426?
This code is for the congenital mitral valve repair service. Codes 33425 and 33426 describe other mitral valve repair approaches, distinguished by whether a prosthetic ring is used; select based on the documented operation and applicable descriptor.
When is 33430 reported instead?
Use 33430 when the mitral valve is replaced rather than repaired. This code represents reconstruction of the patient's native valve.
Can the surgeon report a separate preoperative visit or routine postoperative visits?
The global period includes the day-before preoperative visit and 90 days of related postoperative care. Those included services are not separately reported as routine care for this operation.
Can modifier 50 be used for this repair?
No. Report the mitral repair once; modifier 50 is not appropriate for this descriptor and anatomy.
When can an assistant or co-surgeon be reported?
Assistant-at-surgery payment may be available. Co-surgeon payment requires supporting documentation, while team surgery is not permitted.
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.
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.
3,95133422,,Revision of mitral valve,A,,28.99,11.60,NA,11.60,,6.96,47.55,47.55,0,090,0.09,0.84,0.07,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
3,95233425,,Repair of mitral valve,A,,48.71,15.64,NA,15.64,,11.99,76.34,76.34,0,090,0.09,0.84,0.07,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
3,95333426,,Repair of mitral valve,A,,42.20,14.19,NA,14.19,,10.43,66.82,66.82,0,090,0.09,0.84,0.07,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
3,95433427,,Repair of mitral valve,A,,43.71,13.84,NA,13.84,,10.51,68.06,68.06,0,090,0.09,0.84,0.07,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
3,9553342F,,Mammo assess bengn 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
3,95633430,,Replacement of mitral valve,A,,49.66,16.62,NA,16.62,,12.25,78.53,78.53,0,090,0.09,0.84,0.07,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
3,9573343F,,Mammo probably bengn 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