Billing code 61891: Neurostimulator revisionMedicare rate & RVUs in Utah
Report this code when a surgeon revises or replaces an implanted skull-mounted cranial neurostimulator pulse generator or receiver, such as an epilepsy stimulation system.
CMS doesn’t publish an office rate for 61891 in Utah.
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 61891 covers
A neurosurgeon or functional neurosurgeon uses this service to revise or replace an implanted cranial neurostimulator pulse generator or receiver mounted at the skull. The work may involve reopening the prior operative site, addressing the existing device or its connections, and implanting a replacement unit when needed. A cranially mounted responsive neurostimulation system used for drug-resistant epilepsy is a typical clinical context. The procedure is generally performed in an operating room rather than an office.
Choose this code for revision or replacement of the skull-mounted generator or receiver, not simply because the patient already has cranial electrodes. The operative report should identify the device, the reason for revision or replacement, the work performed, and the resulting configuration. CMS classifies the service as major surgery with a 90-day global period, including the day-before preoperative visit and related postoperative care during that period. When multiple procedures occur in one session, the highest-valued procedure is paid in full and others at 50%. Bilateral reporting with modifier 50 is paid at 150%. Assistant-at-surgery payment requires documented medical necessity; co-surgeons and team surgery are 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.
61891 in Utah
| Payment locality | Office | Facility |
|---|---|---|
| Utah | Unavailable | $803.13 |
How the 61891 rate is calculated
Each of 61891’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 · 61891
RVUs × geographic indexes × conversion factor
Work10.97
10.97 RVUs× 1.000 GPCI
Practice expense9.84
9.84 RVUs× 1.000 GPCI
Malpractice4.26
4.26 RVUs× 1.000 GPCI
Adjusted RVUs
25.0700
Conversion factor
$33.4009
Medicare rate
$837.36
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 61891
61891 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 61891
Neurostimulator revision
| 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) | 0 | Not paid without supporting documentation. |
| Co-surgeons (62) | 0 | Not permitted. |
| 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 · 61891
Neurostimulator revision
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
61891 without 50 · national facility
$837.36
Neurostimulator revision
61891-50 · Bilateral: 150%
$1,256.04
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).
61891 compared with similar codes
Compare codes · National
5 codes, side by side
How to choose
- 61889Neurostimulator implant
- Use 61891 for revision or replacement of an existing skull-mounted cranial generator or receiver. Code 61889 applies to its specified insertion or replacement circumstances.
- 61892Neurostimulator removal
- Code 61892 describes removal of the skull-mounted pulse generator or receiver; 61891 is for revision or replacement rather than removal alone.
- 61885Neurostimulator generator
- Code 61885 concerns a neurostimulator generator in a different device configuration, rather than the skull-mounted cranial generator or receiver addressed by 61891.
- 61880Neuroelectrode surgery
- Code 61880 concerns revision or removal of a neuroelectrode. Code 61891 concerns the skull-mounted pulse generator or receiver, not the electrode itself.
61891 billing questions
How does this differ from 61889?
This code is for revision or replacement of an existing skull-mounted cranial neurostimulator generator or receiver. Code 61889 describes insertion or replacement in its own circumstances; select based on the work performed and the applicable descriptor.
Is this the code for revising a cranial electrode?
No. This code concerns the skull-mounted generator or receiver. Electrode revision or removal is a different service and should be coded only when that work is actually performed and separately supported.
When is modifier 50 relevant?
CMS identifies this as a bilateral procedure; reporting with modifier 50 is paid at 150%. The operative documentation must support bilateral work.
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 surgeon be reported?
Assistant-at-surgery payment is allowed only when medical necessity is documented. Co-surgeons and team surgery are not permitted under the CMS rules supplied for this code.
How is payment adjusted when other procedures are done in the same session?
Under the standard multiple procedure reduction, the highest-valued procedure is paid in full and other 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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