Billing code 77437: Superficial radiationMedicare rate & RVUs in Nevada
Reports delivery of a superficial radiation treatment fraction using equipment operating at 150 kV or less, commonly for selected skin lesions.
Medicare pays $109.61 for 77437 in the office in Nevada (Nevada**). 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.
On this page 9 sections
What 77437 covers
This code represents delivery of a superficial radiation treatment fraction with an x-ray unit operating at 150 kV or less. Radiation therapists typically deliver the treatment in a radiation oncology setting under the direction of a radiation oncologist. Superficial treatment may be selected for appropriately situated skin lesions, including some nonmelanoma skin cancers, when the prescribed treatment approach and lesion depth suit this energy range.
Report the code for the delivered fraction, not for treatment planning or ongoing management. Documentation should identify the treated site, the fraction delivered, and the equipment energy range supporting selection of this code rather than the orthovoltage code. CMS classifies 77437 as a technical-component-only service: it represents the treatment delivery, while interpretation is covered by a separate code. Do not use this code to represent a separately billed professional interpretation.
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.
77437 in Nevada**
| Payment locality | Office | Facility |
|---|---|---|
| Nevada** | $109.61 | Unavailable |
How the 77437 rate is calculated
Each of 77437’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 · 77437
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 0.00Practice expense 3.27Malpractice 0.01
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 77437
The CMS indicators that decide how 77437 is paid alongside other services.
CMS payment indicators · 77437
Superficial radiation
| Rule | CMS value | What it means |
|---|---|---|
| Global period | XXX | The global surgery concept doesn’t apply. |
| Multiple procedures | 0 | No multiple-procedure reduction. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 0 | Not paid without supporting documentation. |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 3 | Technical component only. |
77437 compared with similar codes
Compare codes
77437 vs 77438 vs 77439 vs 77402: national Medicare rates
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How to choose
- 77438Superficial radiation
- Choose 77437 for superficial treatment at 150 kV or less; 77438 covers orthovoltage treatment above 150 kV through 500 kV.
- 77439Radiation image guidance
- 77439 identifies superficial treatment involving ultrasound guidance for placement. 77437 identifies treatment by the superficial energy range without that distinction.
- 77402Radiation delivery
- 77402 reports external-beam treatment delivery by delivery level. 77437 is specific to superficial treatment using equipment at 150 kV or less.
77437 billing questions
How does 77437 differ from 77438?
77437 is for superficial treatment using equipment at 150 kV or less. Use 77438 for orthovoltage treatment above 150 kV through 500 kV.
Is 77437 reported for each treatment fraction?
Yes. Report it for the superficial treatment fraction delivered; planning and treatment management are distinct services.
Does 77437 include the physician's interpretation?
No. CMS identifies 77437 as technical-component-only, with interpretation covered by a separate code.
What documentation supports reporting 77437?
Document the treated site, the fraction delivered, and the unit's energy range. The record should support use of superficial treatment at 150 kV or less rather than orthovoltage treatment.
Can 77437 be used for conventional external-beam delivery?
No. It describes superficial radiation treatment at the specified energy range, not conventional external-beam delivery reported by treatment-delivery level.
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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