This code is for patellar reconstruction without the extensor realignment specified for 27422. Base selection on the documented operative work.
On this page
CMS RVU26D · Effective 2026-10-01
27420 Patellar reconstruction Medicare reimbursement rates in Rhode Island
Reconstructs a patella that repeatedly dislocates or remains unstable, when the operation does not include the extensor realignment described by the related code. Compare 27420 office and facility rates across CMS payment localities in Rhode Island.
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 27420 in Rhode Island?
Rhode Island has 1 payment locality in this comparison. Use the service location to choose the applicable amount. These are the supported base rates for the payment area shown below, using the same CMS release.
Office / nonfacility
No supported rate
Facility setting
$713.65
1 of 1 localities have a supported rate.
Payment area: Rhode Island
One mapped payment locality.
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.
Orthopedic surgery
About 27420: Patellar instability reconstruction without extensor realignment
Reconstructs a patella that repeatedly dislocates or remains unstable, when the operation does not include the extensor realignment described by the related code.
An orthopedic surgeon uses this operation to stabilize a patella with recurrent dislocation or persistent instability. The work may involve soft-tissue or bony reconstruction around the kneecap, based on the patient’s anatomy and the cause of instability. It is typically performed in an operating room for a surgical episode rather than as an office service. The key distinction from 27422 is that this code is for reconstruction without the extensor-mechanism realignment specified by that code.
Select the code from the operative report’s description of the reconstruction and whether extensor realignment was performed. Documentation should identify the instability, the structures addressed, and the procedures used. Medicare assigns a 90-day global period, including the day-before preoperative visit and 90 days of related postoperative care. For multiple procedures in one session, the highest-valued procedure is paid in full and others at 50%. Bilateral reporting with modifier 50 is paid at 150%. An assistant at surgery may be paid; co-surgeon payment requires supporting documentation, and team surgery is not permitted.
CMS billing rules for 27420
- 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 procedure with modifier 50 is paid at 150%.
- 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 RVU10.00 · 47%
- Practice expense (office) RVU8.98 · 43%
- Malpractice RVU2.13 · 10%
80
Medicare services in 2024 · #5047 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.
27420 compared with similar codes
Office rates for Rhode Island, from the same CMS release.
27425 describes an open lateral retinacular release. It is not the code for reconstructing a recurrently dislocating patella.
27424 describes removal of all or part of the patella; 27420 is used when the operative service reconstructs and stabilizes the patella.
Compare 27420 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.
1 of 1 payment localities
Rhode Island →
Office / nonfacility
Unavailable
Facility
$713.65
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How this local rate is calculated
Each RVU component is multiplied by its own geographic practice cost index (GPCI). The three adjusted components are added, then multiplied by the conversion factor. These are the inputs used for 27420 in Rhode Island.
PPRRVU2026_Oct_nonQPP.csv
2,883
- Code
- 27420
- Physician work
- 10.00
- Practice expense
- 8.98
- Malpractice
- 2.13
GPCI2026.csv
92
- Locality
- Rhode Island
- Physician work
- 1.019
- Practice expense
- 1.033
- Malpractice
- 0.892
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 10.00 | × 1.019 | 10.1900 |
| Practice expense | 8.98 | × 1.033 | 9.2763 |
| Malpractice | 2.13 | × 0.892 | 1.9000 |
| Total RVUs | 21.3663 | ||
| Conversion factor | × 33.4009 | ||
Facility rate, Rhode Island$713.65
Explore RVUs, geographic factors and the full formula
Facility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 10 | 1.019 |
| Practice expense | 8.98 | 1.033 |
| Malpractice | 2.13 | 0.892 |
(10 × 1.019 + 8.98 × 1.033 + 2.13 × 0.892) × $33.4009 = $713.65
The office and facility calculations use their respective practice-expense RVUs. The facility amount here is the physician fee, not a separate hospital or facility bill.
27420 billing questions
How do I choose between 27420 and 27422?
Use 27420 when the patellar reconstruction does not include the extensor realignment specified for 27422. Check the operative report for the actual technique rather than relying only on a diagnosis of patellar instability.
What postoperative care is included?
The 90-day global period includes the day-before preoperative visit and 90 days of related postoperative care.
How is bilateral surgery reported?
For bilateral procedures, report modifier 50; CMS pays the bilateral procedure at 150%.
Can an assistant or co-surgeon be reported?
An assistant at surgery may be paid. Co-surgeon payment requires supporting documentation, while team surgery is not permitted.
What happens when other procedures are performed in the same session?
Under the standard multiple procedure reduction, the highest-valued procedure is paid in full and the other procedures are paid at 50%.
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.
