CPT code 61735: Brain lesioning, movement disorder, unilateral2026 Medicare rate & RVUs in Guam
Reports unilateral stereotactic radiofrequency lesioning of intracranial neural tissue to treat a movement disorder, such as tremor or Parkinson disease.
CMS doesn’t publish an office rate for 61735 in Guam.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
Your location
On this page 9 sections
What 61735 covers
This service is stereotactic radiofrequency lesioning of a deep intracranial target to manage a movement disorder. A functional neurosurgeon typically performs it in an operating room, using stereotactic equipment to guide treatment. Clinical contexts may include selected patients with tremor, Parkinson disease, or dystonia when an ablative approach is chosen. The code represents a unilateral procedure; document the treated side and target, the movement disorder being addressed, and the operative technique.
Report this code when the surgeon performs the described intracranial lesioning, rather than implanting stimulation electrodes or using focused ultrasound. It has a 90-day global period, including the day-before preoperative visit and 90 days of related postoperative care. When multiple procedures are performed in the same session, the highest-valued procedure is paid in full and other procedures are subject to the standard 50% reduction. Modifier 50 is inappropriate. Assistant-at-surgery payment is barred; 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.
61735 in Hawaii, Guam, HI
| Payment locality | Office | Facility |
|---|---|---|
| Hawaii, Guam, HI | Unavailable | $1,515.44 |
How the 61735 rate is calculated
Each of 61735’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 · 61735
RVUs × geographic indexes × conversion factor
Work21.79
21.79 RVUs× 1.000 GPCI
Practice expense16.06
16.06 RVUs× 1.000 GPCI
Malpractice9.19
9.19 RVUs× 1.000 GPCI
Adjusted RVUs
47.0400
Conversion factor
$33.4009
Medicare rate
$1,571.18
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 61735
61735 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 61735
Brain lesioning, movement disorder, unilateral
| 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) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 1 | Not paid (statutory restriction). |
| 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) | 0.11/0.76/0.13 | Share of the payment for pre-op, the procedure itself, and post-op care. |
Global surgery period · 61735
Brain lesioning, movement disorder, unilateral
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 51 · payment effect
With and without the modifier
61735 without 51 · national facility
$1,571.18
Brain lesioning, movement disorder, unilateral
61735-51 · Second procedure: 50%
$785.59
When this isn’t the highest-valued procedure in the session, Medicare pays 50% of its fee schedule amount (the highest is paid at 100%).
61735 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 61715Focused ultrasoundIntracranial stereotactic ablation
- Choose 61735 for stereotactic radiofrequency lesioning. Choose 61715 when the intracranial target is ablated using MR-guided focused ultrasound.
- 61863Brain electrode placementSubcortical, without microelectrode recording
- 61735 creates a lesion in neural tissue; 61863 is for implanting a neurostimulator electrode array.
- 61867Neuroelectrode placementSubcortical, with microelectrode recording
- 61735 is an ablative procedure. 61867 describes electrode-array implantation with intraoperative recording, not lesioning.
61735 billing questions
How does this differ from MR-guided focused ultrasound?
This code is for stereotactic intracranial radiofrequency lesioning. Use 61715 for the distinct MR-guided focused ultrasound ablation approach.
Is this a deep brain stimulation electrode implantation code?
No. This code describes lesioning neural tissue; 61863 and 61867 describe implantation of neurostimulator electrodes.
Can modifier 50 be used for bilateral treatment?
No. CMS identifies bilateral adjustment as inappropriate for this code, so modifier 50 is not appropriate.
What documentation supports reporting the service?
Document the movement disorder, intracranial target, treated side, stereotactic approach, and radiofrequency lesioning performed.
What postoperative care is included?
The 90-day global period includes the day-before preoperative visit and 90 days of related postoperative care.
Can an assistant or co-surgeon be reported?
Assistant-at-surgery payment is barred. Co-surgeon payment is available only with supporting documentation; team surgery is not permitted.
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
Fee sheets
Put 61735 and the rest of your codes on one sheet
Your codes at your locality, with payer contracts beside Medicare.
Build my fee sheet