Billing code 27552: Knee reductionMedicare rate & RVUs in Massachusetts
Report this service for closed reduction of a dislocated tibiofemoral knee when anesthesia is required, rather than reduction without anesthesia or open treatment.
CMS doesn’t publish an office rate for 27552 in Massachusetts.
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 27552 covers
This service covers closed reduction of a tibiofemoral knee dislocation when anesthesia is required. The clinician restores the joint alignment without surgically opening the knee; an orthopedic surgeon commonly performs the reduction in an operating room or another setting equipped to provide anesthesia. A traumatic knee dislocation is distinct from a dislocated patella, which involves the kneecap rather than the tibiofemoral joint.
Choose this code when the record supports a knee dislocation, a closed reduction, and the need for anesthesia. Document the injury, reduction performed, and anesthesia context; use the code for reduction without anesthesia when that is the service instead. This is a major procedure with a 90-day global period, including the day-before preoperative visit and 90 days of related postoperative care. For multiple procedures 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%. Assistant-at-surgery payment requires documented medical necessity; co-surgeons and team surgery are 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 27552 pays more and less in Massachusetts
| Payment locality | Office | Facility |
|---|---|---|
| Metropolitan Boston | Unavailable | $666.00 |
| Rest Of Massachusetts | Unavailable | $614.13 |
How the 27552 rate is calculated
Each of 27552’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 · 27552
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 7.98Practice expense 8.49Malpractice 1.68
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 27552
27552 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 27552
Knee reduction
| 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) | 0 | Not paid without supporting documentation. |
| Co-surgeons (62) | 0 | Not permitted. |
| 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 · 27552
Knee reduction
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
27552 without 50 · national facility
$606.23
Knee reduction
27552-50 · Bilateral: 150%
$909.35
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).
27552 compared with similar codes
Compare codes
27552 vs 27550 vs 27556 vs 27557 vs 27562: national Medicare rates
Swap in your local Medicare rate.
How to choose
- 27550Knee dislocation
- Both concern closed treatment of tibiofemoral knee dislocation. Choose 27550 when treatment is without anesthesia; choose 27552 when anesthesia is required.
- 27556Knee dislocation
- 27556 represents open treatment of knee dislocation. This code is for closed reduction under anesthesia, without surgically opening the knee.
- 27557Knee dislocation
- Use 27557 for open treatment involving repair of ligamentous or capsular structures. This code covers closed reduction under anesthesia.
- 27562Patellar reduction
- 27562 concerns patellar dislocation treatment requiring anesthesia. This code is for tibiofemoral knee dislocation.
27552 billing questions
How does this differ from 27550?
Use 27552 when closed reduction of the tibiofemoral knee dislocation requires anesthesia. Code 27550 is for closed treatment without anesthesia.
Can the reduction be coded with open treatment?
This code describes closed reduction. If the knee is surgically opened for treatment, consider the applicable open-treatment code, such as 27556 or 27557, based on the procedure performed.
Is a dislocated kneecap reported with this code?
No. This code concerns tibiofemoral knee dislocation; patellar dislocation treatment is represented by codes such as 27560 or 27562, depending on the circumstances.
What documentation supports reporting 27552?
Document the tibiofemoral knee dislocation, the closed reduction, and that anesthesia was required. The record should make clear that the service was not an open reduction.
What postoperative care is included?
The 90-day global period includes the day-before preoperative visit and 90 days of related postoperative care.
When is an assistant at surgery payable?
CMS payment for an assistant at surgery is allowed only when medical necessity is documented. Co-surgeons and team surgery are not permitted for this code.
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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