CPT code 21120: Chin augmentation, augmentation without sliding osteotomy2026 Medicare rate & RVUs

Medicare pays $715.45 for 21120 nationally in the office and $488.66 in a hospital or facility. Local office rates run $627.40–$948.72.

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

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

The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.

109 of 109 payment localities

21120 rates by state

Office rate range in each state. Select a state to see its payment localities.

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.

Payment rules and modifiers for 21120

21120 has a 90-day global period: related visits in that window are included in the surgery payment.

What modifiers do to the payment

When to use modifier 51

21120 compared with similar codes

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.

Codes related to 21120

Related codes aren’t interchangeable: bill the code that matches the service performed.

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

Open CMS sourceHow we calculate rates