No office rate
Use 27475 for epiphyseal arrest at the distal femur. Use 27485 when the surgeon restrains only one side of the growth plate for guided correction.
On this page
CMS RVU26D · Effective 2026-10-01
27485 Guided growth Medicare reimbursement rates in Idaho
Reports partial growth-plate restraint at the distal femur or proximal tibia to gradually correct a child’s angular leg deformity while growth remains. Compare 27485 office and facility rates across CMS payment localities in Idaho.
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 27485 in Idaho?
Idaho 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
$578.03
1 of 1 localities have a supported rate.
Payment area: Idaho
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 27485: Hemiepiphysiodesis for leg alignment
Reports partial growth-plate restraint at the distal femur or proximal tibia to gradually correct a child’s angular leg deformity while growth remains.
An orthopedic surgeon uses hemiepiphysiodesis to restrain growth on one side of a growth plate, allowing the opposite side to continue growing and gradually improve angular alignment. Typical indications include genu valgum or genu varum in a growing child; the treated site may be the distal femur or proximal tibia or fibula. The surgeon may use a plate, staples, screws, or another technique to achieve the partial restraint.
Report this code for the hemiepiphyseal procedure at the covered site, rather than a procedure that arrests the entire growth plate or corrects alignment by cutting and realigning bone. The operative report should identify the deformity, treated bone and side, growth plate, and technique or implant. Medicare assigns a 90-day global period, including the day-before preoperative visit and related postoperative care during that period. 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%. Medicare does not pay an assistant at surgery; co-surgeons and team surgery are not permitted.
CMS billing rules for 27485
- 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
- Statutory restriction: assistant at surgery is not paid.
- Co-surgeons
- Co-surgeons not permitted.
- Team surgery
- Team surgery not permitted.
Where the value comes from
- Work RVU8.90 · 47%
- Practice expense (office) RVU8.16 · 43%
- Malpractice RVU1.90 · 10%
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.
27485 compared with similar codes
Office rates for Idaho, from the same CMS release.
No office rate
Use 27477 for epiphyseal arrest at the proximal tibia. Code 27485 represents hemiepiphysiodesis, not arrest of the entire growth plate.
No office rate
Use 27479 for epiphyseal arrest at a site other than the distal femur or proximal tibia; 27485 is for hemiepiphysiodesis at its specified leg sites.
Compare 27485 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
Idaho →
Office / nonfacility
Unavailable
Facility
$578.03
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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 27485 in Idaho.
PPRRVU2026_Oct_nonQPP.csv
2,913
- Code
- 27485
- Physician work
- 8.90
- Practice expense
- 8.16
- Malpractice
- 1.90
GPCI2026.csv
47
- Locality
- Idaho
- Physician work
- 1.000
- Practice expense
- 0.920
- Malpractice
- 0.473
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 8.90 | × 1.000 | 8.9000 |
| Practice expense | 8.16 | × 0.920 | 7.5072 |
| Malpractice | 1.90 | × 0.473 | 0.8987 |
| Total RVUs | 17.3059 | ||
| Conversion factor | × 33.4009 | ||
Facility rate, Idaho$578.03
Explore RVUs, geographic factors and the full formula
Facility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 8.9 | 1 |
| Practice expense | 8.16 | 0.92 |
| Malpractice | 1.9 | 0.473 |
(8.9 × 1 + 8.16 × 0.92 + 1.9 × 0.473) × $33.4009 = $578.03
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.
27485 billing questions
How is 27485 different from full epiphyseal arrest codes?
27485 describes restraint of one side of a growth plate for gradual correction. Codes 27475 and 27477 describe epiphyseal arrest at the distal femur and proximal tibia, respectively.
What documentation supports reporting 27485?
Document the angular deformity, the treated bone and side, the growth plate addressed, and the hemiepiphysiodesis method or implant.
Can the code be reported for both legs?
For a bilateral procedure, modifier 50 is paid at 150% under the CMS rule for this code. The operative documentation should support treatment on both sides.
Are assistant surgeon services separately payable?
No. Medicare has a statutory restriction on assistant-at-surgery payment for this code; co-surgeons and team surgery are also not permitted.
Is routine postoperative care separately reported during the global period?
The 90-day global period includes the day-before preoperative visit and related postoperative care. Care outside that included scope is not characterized by this global-period rule.
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.
2,91027475,,Surgery to stop leg growth,A,,8.71,8.22,NA,8.22,,1.85,18.78,18.78,0,090,0.10,0.69,0.21,2,1,1,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,91127477,,Surgery to stop leg growth,A,,9.89,8.59,NA,8.59,,2.10,20.58,20.58,0,090,0.10,0.69,0.21,2,1,1,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,91227479,,Surgery to stop leg growth,A,,12.83,9.87,NA,9.87,,2.73,25.43,25.43,0,090,0.10,0.69,0.21,2,1,2,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,91327485,,Surgery to stop leg growth,A,,8.90,8.16,NA,8.16,,1.90,18.96,18.96,0,090,0.10,0.69,0.21,2,1,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,91427486,,Revise/replace knee joint,A,,20.59,13.23,NA,13.23,,4.35,38.17,38.17,0,090,0.10,0.69,0.21,2,1,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,91527487,,Revise/replace knee joint,A,,26.43,15.11,NA,15.11,,5.60,47.14,47.14,0,090,0.10,0.69,0.21,2,1,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,91627488,,Removal of knee prosthesis,A,,17.16,12.14,NA,12.14,,3.63,32.93,32.93,0,090,0.10,0.69,0.21,2,1,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
4410212,GA,01,ATLANTA,1.003,1.016,1.201
4510212,GA,99,REST OF GEORGIA,1.000,0.892,1.192
4601212,HI,01,"HAWAII, GUAM",1.000,1.137,0.579
4702202,ID,00,IDAHO,1.000,0.920,0.473
4806102,IL,16,CHICAGO,1.007,1.005,2.295
4906102,IL,12,EAST ST. LOUIS,1.000,0.920,2.014
5006102,IL,15,SUBURBAN CHICAGO,1.007,1.027,1.772