$650.41
21120 describes augmentation of the chin. Choose 21121 when the surgeon repositions a single osteotomized bone segment instead.
On this page
CMS RVU26D · Effective 2026-10-01
21121 Sliding genioplasty Medicare reimbursement rates in Kansas
Reports a single-piece chin osteotomy repositioned to correct chin projection, asymmetry, or contour by moving the bone segment. Compare 21121 office and facility rates across CMS payment localities in Kansas.
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 21121 in Kansas?
Kansas 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
$600.36
1 of 1 localities have a supported rate.
Payment area: Kansas
One mapped payment locality.
Facility setting
$453.01
1 of 1 localities have a supported rate.
Payment area: Kansas
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.
Oral and maxillofacial surgery
About 21121: Single-piece sliding genioplasty
Reports a single-piece chin osteotomy repositioned to correct chin projection, asymmetry, or contour by moving the bone segment.
This operation reshapes the chin by cutting the mandibular symphysis as one segment, moving that segment to a planned position, and securing it. Oral and maxillofacial surgeons and plastic surgeons perform it in an operating room for concerns such as chin retrusion, excess projection, asymmetry, or vertical contour. It may be performed alone or as part of orthognathic reconstruction.
Choose 21121 when the operative report documents one sliding bone segment; a multisegment osteotomy or added augmentation changes the code selection. Document the osteotomy configuration, direction of movement, fixation, and any graft or implant work. CMS assigns a 90-day major-surgery global: the day-before preoperative visit and related postoperative care through day 90 are included. For multiple procedures in one session, the highest-valued procedure is paid in full and others are subject to the standard 50% reduction. CMS permits assistant-at-surgery payment, but not co-surgeon or team-surgery payment. The midline chin procedure is reported without modifier 50; bilateral adjustment is inappropriate.
CMS billing rules for 21121
- 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 adjustment does not apply; the descriptor or anatomy makes modifier 50 inappropriate.
- Assistant at surgery
- Assistant at surgery may be paid.
- Co-surgeons
- Co-surgeons not permitted.
- Team surgery
- Team surgery not permitted.
Where the value comes from
- Work RVU7.61 · 39%
- Practice expense (office) RVU10.98 · 56%
- Malpractice RVU0.87 · 4%
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.
21121 compared with similar codes
Office rates for Kansas, from the same CMS release.
No office rate
21122 is for a sliding osteotomy divided into two or more segments; 21121 is the single-segment procedure.
No office rate
21123 includes augmentation with the sliding osteotomy. Use 21121 when the documented procedure is a single-piece sliding osteotomy without that augmentation.
Compare 21121 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
Kansas →
Office / nonfacility
$600.36
Facility
$453.01
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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 21121 in Kansas.
PPRRVU2026_Oct_nonQPP.csv
1,878
- Code
- 21121
- Physician work
- 7.61
- Practice expense
- 10.98
- Malpractice
- 0.87
GPCI2026.csv
54
- Locality
- Kansas
- Physician work
- 1.000
- Practice expense
- 0.904
- Malpractice
- 0.504
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 7.61 | × 1.000 | 7.6100 |
| Practice expense | 10.98 | × 0.904 | 9.9259 |
| Malpractice | 0.87 | × 0.504 | 0.4385 |
| Total RVUs | 17.9744 | ||
| Conversion factor | × 33.4009 | ||
Office / nonfacility rate, Kansas$600.36
Explore RVUs, geographic factors and the full formula
Office / nonfacility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 7.61 | 1 |
| Practice expense | 10.98 | 0.904 |
| Malpractice | 0.87 | 0.504 |
(7.61 × 1 + 10.98 × 0.904 + 0.87 × 0.504) × $33.4009 = $600.36
Facility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 7.61 | 1 |
| Practice expense | 6.1 | 0.904 |
| Malpractice | 0.87 | 0.504 |
(7.61 × 1 + 6.1 × 0.904 + 0.87 × 0.504) × $33.4009 = $453.01
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.
21121 billing questions
How does 21121 differ from 21122?
21121 describes a sliding genioplasty using one bone segment. Use 21122 when the osteotomy divides the chin into two or more segments.
When is 21123 used instead?
Use 21123 when augmentation is performed with the sliding osteotomy. The operative report should identify the augmentation material or graft work.
Can modifier 50 be reported?
No. The chin is a midline site for this procedure, and CMS identifies modifier 50 as inappropriate.
Can an assistant surgeon be paid?
CMS permits assistant-at-surgery payment for 21121. Co-surgeon and team-surgery payment are not permitted for this code.
What postoperative care is included?
The 90-day global includes the day-before preoperative visit and related postoperative care through day 90.
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.
1,87521110,,Interdental fixation,A,,5.84,19.58,,13.65,,0.71,26.13,20.20,0,090,0.10,0.69,0.21,2,0,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,87621116,,Injection jaw joint x-ray,A,,0.79,5.75,,0.25,,0.12,6.66,1.16,0,000,0.00,0.00,0.00,2,1,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,87721120,,Genioplasty augmentation,A,,4.97,15.53,,8.74,,0.92,21.42,14.63,0,090,0.10,0.69,0.21,2,0,1,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,87821121,,Geniop sldg osteot 1,A,,7.61,10.98,,6.10,,0.87,19.46,14.58,0,090,0.10,0.69,0.21,2,0,2,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,87921122,,Geniop sldg osteot 2/>,A,,8.49,10.90,NA,10.90,,1.57,20.96,20.96,0,090,0.10,0.69,0.21,2,0,2,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,88021123,,Geniop sldg augmentation,A,,11.06,10.62,NA,10.62,,1.61,23.29,23.29,0,090,0.10,0.69,0.21,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
1,88121125,,Augmentation mndblr prostc,A,,10.53,65.97,,6.39,,1.21,77.71,18.13,0,090,0.10,0.69,0.21,2,0,2,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
5106102,IL,99,REST OF ILLINOIS,1.000,0.913,1.563
5208102,IN,00,INDIANA,1.000,0.927,0.486
5305102,IA,00,IOWA,1.000,0.915,0.397
5405202,KS,00,KANSAS,1.000,0.904,0.504
5515102,KY,00,KENTUCKY,1.000,0.889,0.915
5607202,LA,01,NEW ORLEANS,1.000,0.941,1.136
5707202,LA,99,REST OF LOUISIANA,1.000,0.885,0.958