CPT code 21120: Chin augmentation, augmentation without sliding osteotomy2026 Medicare rate & RVUs in Florida
Reports surgical chin augmentation using implanted or grafted material when the surgeon increases chin projection without performing a sliding genioplasty.
Medicare pays $708.08–$783.70 for 21120 in the office in Florida, from Rest of Florida to Miami, FL. Which amount applies depends on the service address.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
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On this page 9 sections
What 21120 covers
This procedure increases chin projection or contour by adding material to the chin, such as an implant or graft. It is typically performed by an oral and maxillofacial surgeon, plastic surgeon, or facial plastic surgeon to address a retrusive or under-projected chin. The operative work is augmentation of the chin itself, rather than repositioning a segment of the chin bone through a sliding osteotomy.
Select the code when the operative report supports chin augmentation and identifies the material and technique. Distinguish it from sliding genioplasty codes, which involve osteotomy and repositioning, and from mandibular augmentation directed at a broader jaw area. Medicare assigns a 90-day global period; the day-before preoperative visit and 90 days of related postoperative care are included. When multiple procedures are performed in one session, the highest-valued procedure is paid in full and other procedures are subject to the standard 50% reduction. Assistant-at-surgery payment is restricted by statute; co-surgeons are paid only with 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 21120 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.
3 payment localities
$708.08 to $783.70
| Payment locality | Office | Facility |
|---|---|---|
| Fort Lauderdale, FL | $747.02 | $517.28 |
| Miami, FL | $783.70 | $547.61 |
| Rest of Florida | $708.08 | $491.27 |
How the 21120 rate is calculated
Each of 21120’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 · 21120
RVUs × geographic indexes × conversion factor
Work4.97
4.97 RVUs× 1.000 GPCI
Practice expense15.53
15.53 RVUs× 1.000 GPCI
Malpractice0.92
0.92 RVUs× 1.000 GPCI
Adjusted RVUs
21.4200
Conversion factor
$33.4009
Medicare rate
$715.45
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 21120
21120 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 21120
Chin augmentation, augmentation without sliding 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) | 0 | The 150% bilateral adjustment doesn’t apply. |
| 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 · 21120
Chin augmentation, augmentation without sliding 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 51 · payment effect
With and without the modifier
21120 without 51 · national office
$715.45
Chin augmentation, augmentation without sliding osteotomy
21120-51 · Second procedure: 50%
$357.73
When this isn’t the highest-valued procedure in the session, Medicare pays 50% of its fee schedule amount (the highest is paid at 100%).
21120 compared with similar codes
Compare codes · National
5 codes, side by side
How to choose
- 21121Sliding genioplastySingle-piece osteotomy
- Use 21121 for a sliding genioplasty involving one osteotomy and repositioning of the chin segment. Use 21120 for augmentation with added material without that sliding osteotomy.
- 21122Sliding genioplastyTwo or more osteotomies
- Use 21122 when the chin is repositioned through multiple osteotomies. Chin augmentation without osteotomy is reported with 21120.
- 21123Chin augmentationSliding osteotomy with graft
- Use 21123 when the surgeon performs a sliding genioplasty and adds augmentation in the same chin procedure. Use 21120 for augmentation without the sliding osteotomy.
- 21125Mandibular augmentationProsthetic material
- 21125 describes prosthetic augmentation of the mandible beyond a chin-specific augmentation. Choose based on the anatomic scope documented in the operative report.
21120 billing questions
How is this different from a sliding genioplasty?
This code describes chin augmentation with added material. Sliding genioplasty codes describe cutting and repositioning the chin bone, with the code choice depending on the osteotomy and augmentation performed.
Can this code be reported with a sliding genioplasty?
A sliding genioplasty that also includes augmentation is represented by the specific combined code, 21123. Do not separately report 21120 for the same augmentation work included in that procedure.
What should the operative report document?
Document the chin-specific purpose, the material used, its placement, and the technique. The report should make clear that the work augmented the chin rather than repositioning a bony segment.
Are related postoperative visits included?
Yes. The 90-day global period includes the day-before preoperative visit and 90 days of related postoperative care.
How does Medicare handle another procedure performed in the same session?
The highest-valued procedure is paid in full, and other procedures in that session are subject to the standard multiple-procedure reduction.
Can an assistant or co-surgeon be reported?
Assistant-at-surgery payment is restricted by statute. Co-surgeons are paid only with supporting documentation; 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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