CPT code 24366: Radial head arthroplasty, with prosthetic implant2026 Medicare rate & RVUs

Medicare pays $635.29 for 24366 nationally in a facility.

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

What 24366 covers

The surgeon removes or reshapes the damaged radial head and places a prosthetic implant to restore the radial head’s role in elbow articulation and forearm rotation. This operation is performed by an orthopedic surgeon in an operating room, commonly when the radial head cannot be reconstructed adequately with the patient’s own bone. The operative report should identify the treated side and document the implant and the work performed on the radial head.

Report 24366 for radial head arthroplasty with an implant; distinguish it from implant-free arthroplasty and from open treatment of a radial head or neck fracture. For an acute fracture managed with prosthetic replacement, evaluate 24666, which describes the fracture treatment with replacement. CMS assigns a 90-day major-surgery global period, including the day-before preoperative visit and 90 days of related postoperative care. In a same-session multiple-procedure setting, the highest-valued procedure is paid in full and other procedures at 50%. Modifier 50 for a bilateral procedure is paid at 150%. An assistant at surgery may be paid; co-surgeons require 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 24366 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

24366 rates by state

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

How the 24366 rate is calculated

Each of 24366’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 24366

24366 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 50

24366 compared with similar codes

How to choose

24365Radial head reconstructionWithout prosthetic implant

Choose 24366 when a prosthetic implant is used for radial head arthroplasty; 24365 is the implant-free sibling service.

24666Radial head surgeryWith prosthetic replacement

For open treatment of an acute radial head or neck fracture with prosthetic replacement, evaluate 24666. Code 24366 describes radial head arthroplasty rather than the fracture-treatment service.

24665Radial head surgeryWithout prosthetic replacement

24665 describes open treatment of a radial head or neck fracture with internal fixation or excision when performed. It does not describe the prosthetic replacement captured by 24666.

Codes related to 24366

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