Billing code 33427: Mitral valve repairMedicare rate & RVUs in Florida
Open surgical repair of a congenitally abnormal mitral valve is reported when the surgeon reconstructs the valve during an operation using cardiopulmonary bypass.
CMS doesn’t publish an office rate for 33427 in Florida.
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 9 sections
What 33427 covers
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.
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 33427 pays more and less in Florida
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
| Payment locality | Office | Facility |
|---|---|---|
| Fort Lauderdale | Unavailable | $2,562.92 |
| Miami | Unavailable | $2,828.96 |
| Rest Of Florida | Unavailable | $2,429.50 |
How the 33427 rate is calculated
Each of 33427’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 · 33427
RVUs × geographic indexes × conversion factor
Work43.71
43.71 RVUs× 1.000 GPCI
Practice expense13.84
13.84 RVUs× 1.000 GPCI
Malpractice10.51
10.51 RVUs× 1.000 GPCI
Adjusted RVUs
68.0600
Conversion factor
$33.4009
Medicare rate
$2,273.27
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 33427
33427 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 33427
Mitral valve repair
| Rule | CMS value | What it means |
|---|---|---|
| Global period | 090 | Major surgery: the day before, the day of, and 90 days after are included. |
| Multiple procedures | 2 | Standard reduction: highest-valued procedure at 100%, others at 50%. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 2 | Paid. |
| Co-surgeons (62) | 1 | Permitted with supporting documentation. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 0 | Physician service: no professional/technical split. |
| Split (54/55/56) | 0.09/0.84/0.07 | Share of the payment for pre-op, the procedure itself, and post-op care. |
Global surgery period · 33427
Mitral valve 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.
Pre-op dayGlobal period
What modifiers do to the payment
Modifier 51 · payment effect
With and without the modifier
33427 without 51 · national facility
$2,273.27
Mitral valve repair
33427-51 · Second procedure: 50%
$1,136.64
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%).
33427 compared with similar codes
Compare codes · National
5 codes, side by side
How to choose
- 33425Mitral valve repair
- 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.
- 33426Mitral valve repair
- 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.
- 33418Mitral valve repair
- 33418 is a transcatheter mitral repair, while this code represents open surgical repair using cardiopulmonary bypass.
- 33430Mitral valve replacement
- 33430 is reported when the mitral valve is replaced. This code is for repair that reconstructs the native valve.
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 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
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