CPT code 77425: Intraoperative radiation, electron beam2026 Medicare rate & RVUs in Illinois
Identifies electron-beam radiation delivered to an operative treatment area during surgery, rather than routine external-beam treatment at separate visits.
CMS doesn’t publish an office rate for 77425 in Illinois.
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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What 77425 covers
77425 identifies electron-beam radiation delivered intraoperatively to a surgical treatment area. The radiation oncology team coordinates delivery with the surgeon while the operative site is accessible, commonly after tumor removal. The treatment occurs during the surgical episode, rather than as routine external-beam treatments at separate visits. The code represents radiation delivery, not the cancer operation itself. It is used in cancer treatment when radiation is directed to the operative site.
Medicare assigns status X: the service is excluded from physician fee schedule payment because it is not a physician service under the Medicare statute. When covered, it is paid under another fee schedule or payment system. Report it for the intraoperative electron delivery, distinct from the operative procedure.
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 77425 pays more and less in Illinois
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
| Payment locality | Office | Facility |
|---|---|---|
| Chicago, IL | Unavailable | Unavailable |
| East St. Louis, IL | Unavailable | Unavailable |
| Rest of Illinois | Unavailable | Unavailable |
| Suburban Chicago, IL | Unavailable | Unavailable |
How the 77425 rate is calculated
Each of 77425’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 · 77425
RVUs × geographic indexes × conversion factor
Work0.00
0.00 RVUs× 1.000 GPCI
Practice expense0.00
0.00 RVUs× 1.000 GPCI
Malpractice0.00
0.00 RVUs× 1.000 GPCI
Adjusted RVUs
0.0000
Conversion factor
$33.4009
Medicare rate
$0.00
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 77425
77425 has no global surgery period, no multiple-procedure, bilateral or assistant-at-surgery adjustment, and no professional/technical split. What changes the payment is where the service happens: the place of service on the claim decides whether Medicare pays the office or the facility rate.
Place of service · 77425
Which rate does Medicare pay?
The POS code on the claim line (CMS-1500 box 24B).
POS 11 · non-facility rate · national
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77425 isn’t priced in this setting.
77425 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 77424Intraoperative radiationX-ray delivery
- Both are for radiation delivered during surgery. Choose 77425 for electron-beam delivery and 77424 for x-ray delivery.
- 77402Radiation deliveryLevel 1
- 77402 describes level-based external-beam treatment delivery, not electron radiation delivered intraoperatively.
- 77412Radiation deliveryComplex treatment
- 77412 describes a higher-level external-beam treatment delivery; 77425 identifies intraoperative electron delivery.
77425 billing questions
How does 77425 differ from 77424?
Both describe intraoperative radiation delivery. 77425 is for electron-beam delivery; 77424 is for delivery using x-rays.
Is 77425 paid under the Medicare physician fee schedule?
No. Its status X means the physician fee schedule never pays it. When covered, payment is under another fee schedule or payment system.
Does 77425 represent the surgery as well as the radiation?
No. It identifies intraoperative electron radiation delivery, not the surgical procedure.
Can 77425 describe routine external-beam treatment?
No. 77425 identifies intraoperative electron delivery; codes such as 77402 and 77412 describe level-based external-beam treatment delivery.
What should the record support?
Document the intraoperative electron treatment delivered and its relationship to the operative treatment area, distinguishing the radiation delivery from the surgery.
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
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