Billing code 27442: Knee revisionMedicare rate & RVUs in Oregon
Reports operative revision arthroplasty of the knee joint, generally performed by an orthopedic surgeon when the joint requires reconstructive surgical treatment.
CMS doesn’t publish an office rate for 27442 in Oregon.
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 27442 covers
This code represents an operative revision arthroplasty involving the knee joint. An orthopedic surgeon typically performs the procedure in a hospital or ambulatory surgery facility, addressing a joint that needs reconstructive surgical treatment. The operative report should make clear what was revised and the work performed; a ligament reconstruction, patellar realignment, or routine primary total knee replacement is a different service.
Report the code when the documented operation supports this knee-joint revision service, rather than selecting it from the diagnosis alone. CMS assigns a 90-day global period: the day-before preoperative visit and 90 days of related postoperative care are 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 50% reduction. Bilateral reporting with modifier 50 is paid at 150%. An assistant at surgery may be paid; co-surgeons require supporting documentation, and team surgery is not permitted.
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 27442 pays more and less in Oregon
| Payment locality | Office | Facility |
|---|---|---|
| Portland | Unavailable | $825.03 |
| Rest Of Oregon | Unavailable | $778.59 |
How the 27442 rate is calculated
Each of 27442’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 · 27442
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 12.06Practice expense 9.51Malpractice 2.53
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 27442
27442 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 27442
Knee revision
| 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) | 1 | Bilateral with modifier 50 pays 150% of the fee schedule amount. |
| 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) | 0.10/0.69/0.21 | Share of the payment for pre-op, the procedure itself, and post-op care. |
Global surgery period · 27442
Knee revision
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 50 · payment effect
With and without the modifier
27442 without 50 · national facility
$804.96
Knee revision
27442-50 · Bilateral: 150%
$1,207.44
Both sides on one line with modifier 50 are paid at 150% of the fee schedule amount (subject to multiple-procedure rules with other procedures).
27442 compared with similar codes
Compare codes
27442 vs 27443 vs 27446 vs 27447 vs 27486: national Medicare rates
Swap in your local Medicare rate.
How to choose
- 27443Knee revision
- This related arthroplasty code includes debridement and partial synovectomy. Choose based on the operative service documented, not simply the diagnosis.
- 27446Partial knee replacement
- This code describes arthroplasty limited to the medial or lateral compartment. Use it when the operation meets that compartment-specific service rather than the revision service represented here.
- 27447Total knee replacement
- This code is for primary replacement of both knee compartments. It is not interchangeable with a revision procedure.
- 27486Knee revision
- This code identifies revision total knee arthroplasty involving one component. Use it when the documented operation meets that component-specific revision service.
27442 billing questions
How is this code different from a total knee replacement?
This code represents revision arthroplasty of the knee joint. A primary replacement of both knee compartments is reported with 27447 when the operative service meets that code’s criteria.
Does the 90-day global period include postoperative visits?
Yes. Related postoperative care for 90 days is included, along with the preoperative visit on the day before surgery.
How are other procedures performed in the same session paid?
The highest-valued procedure is paid in full; other procedures are subject to the standard multiple-procedure reduction, with payment at 50%.
Can modifier 50 be used for bilateral surgery?
CMS identifies this as a bilateral procedure; reporting with modifier 50 is paid at 150%.
Can an assistant or co-surgeon be reported?
An assistant at surgery may be paid. Co-surgeon payment requires supporting documentation, and team surgery is not permitted.
What should the operative report establish?
Document the knee-joint revision performed and the operative work supporting this service. The diagnosis by itself does not establish which procedure code applies.
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
Fee sheets
Put 27442 and the rest of your codes on one sheet
Build a fee sheet from your own code list at your locality, put your payer contracts beside Medicare, and see what changed each quarter.
Build my fee sheetOr price your code list free →