Billing code 61312: Hematoma evacuationMedicare rate & RVUs in Illinois
Reports operative evacuation of an extradural or subdural hematoma above the tentorium through a craniotomy or craniectomy.
CMS doesn’t publish an office rate for 61312 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.
On this page 9 sections
What 61312 covers
A neurosurgeon uses a craniotomy or craniectomy to reach and remove an extradural or subdural hematoma in the supratentorial compartment. The service is typically performed in a hospital operating room for conditions such as an acute intracranial bleed requiring surgical evacuation. The code identifies both the hematoma’s location and its compartment; it is not the code for an intracerebral clot or a hematoma below the tentorium.
The operative report should establish the supratentorial site, whether the collection is extradural or subdural, and that it was evacuated. The surgical approach and routine work integral to reaching and closing the operative site are part of the service. This major surgery includes the day-before preoperative visit and 90 days of related postoperative care. When multiple procedures occur in the same session, the highest-valued procedure is paid in full and other procedures 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. Modifier 50 is inappropriate for this descriptor and anatomy.
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 61312 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 | Unavailable | $2,549.60 |
| East St. Louis | Unavailable | $2,374.91 |
| Rest Of Illinois | Unavailable | $2,184.45 |
| Suburban Chicago | Unavailable | $2,347.10 |
How the 61312 rate is calculated
Each of 61312’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 · 61312
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 29.42Practice expense 18.25Malpractice 12.36
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 61312
61312 has a 90-day global period: related visits in that window are included in the surgery payment.
CMS payment indicators · 61312
Hematoma evacuation
| 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 · 61312
Hematoma evacuation
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
61312 without 51 · national facility
$2,005.06
Hematoma evacuation
61312-51 · Second procedure: 50%
$1,002.53
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%).
61312 compared with similar codes
Compare codes
61312 vs 61313 vs 61314 vs 61322: national Medicare rates
Swap in your local Medicare rate.
How to choose
- 61313Hematoma evacuation
- Choose 61313 when the hematoma is within brain tissue in the supratentorial compartment. This code is for an extradural or subdural collection above the tentorium.
- 61314Hematoma evacuation
- Both codes describe extradural or subdural hematoma evacuation, but 61314 is for the infratentorial compartment; this code is supratentorial.
- 61322Cranial decompression
- 61322 describes cranial decompression without lobectomy, rather than evacuation of a specifically identified supratentorial extradural or subdural hematoma.
61312 billing questions
How does this code differ from 61313?
Use this code for a supratentorial extradural or subdural collection. Code 61313 describes evacuation of a hematoma within the brain tissue.
Can the craniotomy or craniectomy be reported separately?
The operative access is part of the hematoma evacuation service. Do not separately report routine access or closure as a second procedure.
Should modifier 50 be appended?
No. Modifier 50 is inappropriate for this code’s descriptor and anatomy.
How is the 90-day global period handled?
The day-before preoperative visit and 90 days of related postoperative care are included in the major-surgery global period.
Can an assistant or co-surgeon be reported?
Assistant-at-surgery payment may be made. Co-surgeon payment requires supporting documentation; team surgery is not permitted.
What happens when another procedure is performed in the same session?
The highest-valued procedure is paid in full, while other procedures are subject to the standard multiple-procedure reduction.
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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