Billing code 27707: Fibular osteotomyMedicare rate & RVUs in Guam
Reports a planned surgical cut and realignment of the fibula to correct a bone deformity or alignment problem involving the lower leg or ankle.
CMS doesn’t publish an office rate for 27707 in Guam.
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 27707 covers
An orthopedic surgeon makes a controlled cut in the fibula and reshapes or repositions the bone according to the operative plan. The procedure may address fibular malalignment or a deformity affecting lower-leg or ankle alignment. It is generally performed in an operating room, such as a hospital or ambulatory surgery center. The operative report should identify the fibula as the bone treated and describe the deformity, the osteotomy performed, and the resulting correction.
Report this code when the procedure is confined to the fibula; a tibial osteotomy or osteotomies of both bones point to different codes. Medicare assigns a 90-day global period, including the day-before preoperative visit and 90 days of related postoperative care. When other procedures are performed in the same session, the highest-valued procedure is paid in full and the others at 50%. Bilateral reporting with modifier 50 is paid at 150%. Assistant-at-surgery payment is restricted; 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.
27707 in Hawaii, Guam
| Payment locality | Office | Facility |
|---|---|---|
| Hawaii, Guam | Unavailable | $408.32 |
How the 27707 rate is calculated
Each of 27707’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 · 27707
RVUs × geographic indexes × conversion factor
Work4.66
4.66 RVUs× 1.000 GPCI
Practice expense6.20
6.20 RVUs× 1.000 GPCI
Malpractice0.89
0.89 RVUs× 1.000 GPCI
Adjusted RVUs
11.7500
Conversion factor
$33.4009
Medicare rate
$392.46
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 27707
27707 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 27707
Fibular osteotomy
| 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) | 1 | Not paid (statutory restriction). |
| 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 · 27707
Fibular osteotomy
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
27707 without 50 · national facility
$392.46
Fibular osteotomy
27707-50 · Bilateral: 150%
$588.69
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).
27707 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 27705Tibial osteotomy
- This code applies when the osteotomy is on the tibia. Code 27707 is for the fibula.
- 27709Osteotomy
- Use 27709 when osteotomies involve both the tibia and fibula; use 27707 when the fibula alone is treated.
- 27715Bone length correction
- This code addresses tibial and fibular lengthening or shortening. Code 27707 describes a fibula-only osteotomy without that length-change distinction.
27707 billing questions
How is this different from a tibial osteotomy?
This code is for an osteotomy of the fibula. Use the tibial osteotomy code when the tibia is the bone cut.
When is the code for osteotomy of both tibia and fibula a better fit?
Use the combined-bone code when the operative work includes osteotomies of both the tibia and fibula. This code describes work on the fibula alone.
What documentation supports reporting this code?
The operative report should identify the fibula, the alignment or deformity being treated, and the osteotomy and correction performed. It should also make clear whether the tibia was treated during the same session.
How does the 90-day global period affect postoperative billing?
The day-before preoperative visit and 90 days of related postoperative care are included in the global period. This applies to care related to the osteotomy.
How is bilateral surgery paid?
When the procedure is performed bilaterally and reported with modifier 50, Medicare pays it at 150%.
Can an assistant or co-surgeon be reported?
Assistant-at-surgery payment is restricted for this code. Co-surgeons are paid only when supporting documentation is provided; team surgery is not permitted.
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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