CPT code 62100: Brain fluid leak repair, craniotomy-based dural repair2026 Medicare rate & RVUs in Florida
Reports operative repair of an intracranial cerebrospinal fluid leak when a neurosurgeon closes the responsible dural defect through a cranial approach.
CMS doesn’t publish an office rate for 62100 in Florida.
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 62100 covers
A neurosurgeon uses a cranial opening to reach and repair a dural defect responsible for cerebrospinal fluid leakage. The service may be needed for a persistent leak after cranial trauma or prior surgery, or when an intracranial defect is associated with an encephalocele. These repairs are typically performed in a hospital operating room. The operative report should establish the leak and describe the defect, cranial approach, and repair performed.
Select this code when the operation is directed at closing the cerebrospinal fluid leak, rather than repairing a skull defect alone or treating a separate skull-base encephalocele procedure. CMS assigns 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 the others are subject to the standard 50% reduction. 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 62100 pays more and less in Florida
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
| Payment locality | Office | Facility |
|---|---|---|
| Fort Lauderdale, FL | Unavailable | $1,662.54 |
| Miami, FL | Unavailable | $1,853.85 |
| Rest of Florida | Unavailable | $1,561.66 |
How the 62100 rate is calculated
Each of 62100’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 · 62100
RVUs × geographic indexes × conversion factor
Work22.94
22.94 RVUs× 1.000 GPCI
Practice expense13.23
13.23 RVUs× 1.000 GPCI
Malpractice7.43
7.43 RVUs× 1.000 GPCI
Adjusted RVUs
43.6000
Conversion factor
$33.4009
Medicare rate
$1,456.28
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 62100
62100 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 62100
Brain fluid leak repair, craniotomy-based dural repair
| 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) | 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) | 0.11/0.76/0.13 | Share of the payment for pre-op, the procedure itself, and post-op care. |
Global surgery period · 62100
Brain fluid leak repair, craniotomy-based dural repair
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
62100 without 51 · national facility
$1,456.28
Brain fluid leak repair, craniotomy-based dural repair
62100-51 · Second procedure: 50%
$728.14
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%).
62100 compared with similar codes
Compare codes · National
5 codes, side by side
How to choose
- 62120Encephalocele repairSkull base, extradural
- 62120 is for skull-base encephalocele repair by an extradural approach. 62100 is selected when the operative target is closure of a cerebrospinal fluid leak.
- 62121Skull-base repairEncephalocele repair
- 62121 describes skull-base encephalocele repair by an intradural approach; 62100 describes operative repair of a cerebrospinal fluid leak.
- 62140CranioplastyDefect under 5 cm
- 62140 is cranioplasty for a skull defect of 5 cm or less. Use 62100 when the operation repairs the dural defect responsible for a cerebrospinal fluid leak.
- 62141CranioplastyDefect over 5 cm
- 62141 is cranioplasty for a skull defect larger than 5 cm. The distinction from 62100 is whether the surgery addresses the skull defect or repairs the cerebrospinal fluid leak.
62100 billing questions
When should this code be chosen over a skull-defect repair code?
Use 62100 when the operative objective is closure of a cerebrospinal fluid leak through repair of its dural defect. A procedure directed at repairing a skull defect, rather than the leak, may fit a cranioplasty code instead.
How does this differ from codes 62120 and 62121?
Those codes describe skull-base encephalocele repair by extradural or intradural approach. Choose based on the operation actually performed; 62100 is for operative repair of a cerebrospinal fluid leak.
What documentation supports reporting 62100?
The operative note should identify the cerebrospinal fluid leak, the dural defect being repaired, the cranial approach, and the repair performed.
How does the 90-day global period affect postoperative billing?
The day-before preoperative visit and 90 days of related postoperative care are included in the global period. CMS assigns this code a 90-day global period.
How are multiple procedures in the same session paid?
The highest-valued procedure is paid in full, and other procedures in the session are subject to the standard multiple procedure reduction.
Can an assistant or co-surgeon be reported?
An assistant at surgery may be paid. Co-surgeon payment requires supporting documentation, while 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
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