Billing code 24420: Humerus osteoplastyMedicare rate & RVUs in Oregon
Corrective humeral surgery that reshapes or changes bone length, reported for procedures such as shortening or lengthening the upper-arm bone.
CMS doesn’t publish an office rate for 24420 in Oregon.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
On this page 9 sections
What 24420 covers
This operation changes the shape or length of the humerus to correct a deformity or length discrepancy. An orthopedic surgeon typically performs it in an operating room, with or without fixation as needed to maintain the correction. The documented work should show that the humerus itself was reshaped or its length altered, rather than simply treating a fracture-healing problem.
Report the code when the operative work is humeral osteoplasty, not a single or multiple humeral osteotomy or repair of a nonunion or malunion. The record should identify the indication, side, bone work performed, and any fixation. Medicare assigns a 90-day global period, including the day-before preoperative visit and 90 days of related postoperative care. For bilateral reporting with modifier 50, payment is at 150%. When multiple procedures occur in one session, the highest-valued procedure is paid in full and others at 50%. An assistant at surgery may be paid; co-surgeon payment requires 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 24420 pays more and less in Oregon
| Payment locality | Office | Facility |
|---|---|---|
| Portland | Unavailable | $1,035.46 |
| Rest Of Oregon | Unavailable | $971.58 |
How the 24420 rate is calculated
Each of 24420’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 · 24420
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 13.39Practice expense 13.75Malpractice 2.85
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 24420
24420 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 24420
Humerus osteoplasty
| 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) | 1 | Bilateral with modifier 50 pays 150% of the fee schedule amount. |
| Assistant at surgery (80/81/82/AS) | 2 | Paid. |
| 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 · 24420
Humerus osteoplasty
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 50 · payment effect
With and without the modifier
24420 without 50 · national facility
$1,001.69
Humerus osteoplasty
24420-50 · Bilateral: 150%
$1,502.54
Both sides on one line with modifier 50 are paid at 150% of the fee schedule amount (subject to multiple-procedure rules with other procedures).
24420 compared with similar codes
Compare codes
24420 vs 24400 vs 24410 vs 24430 vs 24435: national Medicare rates
Swap in your local Medicare rate.
How to choose
- 24400Humerus osteotomy
- Code 24400 describes humeral osteotomy, with or without internal fixation. Code 24420 applies when the operative service is osteoplasty, such as changing humeral length or shape.
- 24410Humeral osteotomy
- Code 24410 is for multiple osteotomies of the humeral shaft. Code 24420 is not selected simply because the correction involves the humerus; the operative technique and purpose must support osteoplasty.
- 24430Humerus repair
- Code 24430 addresses repair of a humeral nonunion or malunion without graft. Use 24420 for humeral reshaping or length alteration when the service is not repair of a nonunion or malunion.
- 24435Humerus repair
- Code 24435 describes nonunion or malunion repair with graft. The graft-supported repair distinguishes it from humeral osteoplasty reported with 24420.
24420 billing questions
How is this different from humeral osteotomy code 24400?
Use 24420 for reshaping or changing the length of the humerus. Code 24400 describes an osteotomy, where the operative approach is cutting the bone to correct its position or alignment.
When would code 24410 be more appropriate?
Code 24410 is for multiple osteotomies of the humeral shaft, such as a correction using multiple bone cuts. Choose 24420 when the documented procedure is humeral osteoplasty.
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 is bilateral surgery reported?
For bilateral performance, report modifier 50; CMS payment for the bilateral procedure is at 150%.
Can an assistant or co-surgeon be reported?
An assistant at surgery may be paid. Co-surgeons are paid only when supporting documentation is provided; team surgery is not permitted.
What happens when another procedure is performed in the same session?
Under the standard multiple procedure reduction, the highest-valued procedure is paid in full and the other procedure or procedures are paid at 50%.
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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