Billing code 27335: Knee synovectomyMedicare rate & RVUs in Florida
Reports open removal of substantial synovial tissue from both the anterior and posterior knee when disease involves both regions.
CMS doesn’t publish an office rate for 27335 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 27335 covers
An orthopedic surgeon removes diseased synovial lining from both the anterior and posterior regions of the knee through an open operation. This may be performed for substantial proliferative or chronically inflamed synovium, including synovial disease associated with inflammatory arthritis. The operative report should establish that the work involved both regions, rather than a single-sided synovectomy or diagnostic tissue sampling.
Choose this code when the documented open synovectomy includes anterior and posterior knee regions; removal confined to one region is represented by the related single-region code. The day-before preoperative visit and 90 days of related postoperative care are included in the 90-day global period. 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 50% reduction. For bilateral surgery, modifier 50 is paid at 150%. Assistant-at-surgery services may be paid; co-surgeon payment requires 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 27335 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 | $782.15 |
| Miami | Unavailable | $843.36 |
| Rest Of Florida | Unavailable | $742.61 |
How the 27335 rate is calculated
Each of 27335’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 · 27335
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 10.29Practice expense 9.05Malpractice 2.19
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 27335
27335 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 27335
Knee synovectomy
| 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 · 27335
Knee synovectomy
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
27335 without 50 · national facility
$719.12
Knee synovectomy
27335-50 · Bilateral: 150%
$1,078.68
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).
27335 compared with similar codes
Compare codes
27335 vs 27334 vs 29876 vs 29875 vs 27330: national Medicare rates
Swap in your local Medicare rate.
How to choose
- 27334Knee synovectomy
- Use 27335 for open synovectomy involving both anterior and posterior knee regions; 27334 describes work in one region.
- 29876Knee synovectomy
- 29876 describes arthroscopic major synovectomy in two or more compartments. This code describes open synovectomy involving anterior and posterior regions.
- 29875Knee synovectomy
- 29875 is for limited arthroscopic synovectomy, not the extensive open anterior-and-posterior removal represented by 27335.
- 27330Knee biopsy
- 27330 is diagnostic biopsy of the knee lining; 27335 is therapeutic removal of substantial synovial tissue from both regions.
27335 billing questions
How does this differ from 27334?
27335 is for open synovectomy involving both anterior and posterior knee regions. Use 27334 when the documented synovectomy is limited to one of those regions.
Can this be reported for an arthroscopic synovectomy?
No. This code describes an open procedure; 29876 is the arthroscopic code for major synovectomy involving two or more compartments.
What documentation supports reporting 27335?
The operative report should describe removal of synovial tissue from both the anterior and posterior regions of the knee and establish the extent of the procedure.
How is bilateral surgery reported?
For bilateral procedures, report modifier 50; CMS pays the bilateral procedure at 150%.
What postoperative care is included?
The 90-day global period includes the day-before preoperative visit and 90 days of related postoperative care.
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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