CPT code 01933: Intracranial intervention, therapeutic radiology procedures2026 Medicare rate & RVUs in Pennsylvania
Anesthesia for therapeutic interventional radiology procedures performed within the intracranial compartment, such as endovascular treatment of a brain aneurysm.
CMS doesn’t publish an office rate for 01933 in Pennsylvania.
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 01933 covers
This service covers anesthesia for therapeutic interventional radiology procedures directed to the intracranial compartment. A typical case is endovascular treatment of an intracranial aneurysm. An anesthesiologist or CRNA provides the anesthetic care in a facility while the interventional radiologist performs the procedure; the anesthesia claim represents the anesthesia service, not the radiologic intervention itself.
Choose this code for therapeutic intracranial intervention rather than anesthesia for diagnostic imaging or a procedure involving carotid or cerebral vessels. The anesthesia and operative records should identify the intracranial treatment, the procedure performed, and the anesthesia practitioner’s attendance and time. This code has 7 base units. Medicare payment is (base units + time units) × the locality’s anesthesia conversion factor; time is reported in minutes and converted to 15-minute units to one decimal place, starting when the practitioner begins preparing the patient for anesthesia and ending when the practitioner is no longer in personal attendance and the patient can safely be placed under postoperative care.
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 01933 pays more and less in Pennsylvania
| Payment locality | Office | Facility |
|---|---|---|
| Metropolitan Philadelphia, PA | Unavailable | Unavailable |
| Rest of Pennsylvania | Unavailable | Unavailable |
How the 01933 rate is calculated
Each of 01933’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 · 01933
RVUs × geographic indexes × conversion factor
Work0.00
0.00 RVUs× 1.000 GPCI
Practice expense0.00
0.00 RVUs× 1.000 GPCI
Malpractice0.00
0.00 RVUs× 1.000 GPCI
Adjusted RVUs
0.0000
Conversion factor
$33.4009
Medicare rate
$0.00
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 01933
01933 has no global surgery period, no multiple-procedure, bilateral or assistant-at-surgery adjustment, and no professional/technical split. What changes the payment is where the service happens: the place of service on the claim decides whether Medicare pays the office or the facility rate.
Place of service · 01933
Which rate does Medicare pay?
The POS code on the claim line (CMS-1500 box 24B).
POS 11 · non-facility rate · national
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01933 isn’t priced in this setting.
01933 compared with similar codes
Compare codes · National
5 codes, side by side
How to choose
- 01925Arterial intervention anesthesiaCarotid or coronary arteries
- 01925 covers interventional radiological procedures involving carotid or cerebral vessels; 01933 covers therapeutic interventional radiology procedures directed intracranially.
- 01926Interventional anesthesiaIntracranial, intracardiac, or aortic
- 01926 is the category for interventional radiology procedures involving intracranial, intracardiac, or aortic procedures. 01933 identifies therapeutic intracranial intervention.
- 01924Arterial interventionOther arterial sites
- 01924 covers therapeutic interventional radiology involving arterial procedures not otherwise specified; 01933 identifies therapeutic intracranial procedures.
- 01922Imaging anesthesiaImaging or radiation therapy
- 01922 applies to anesthesia for noninvasive imaging or radiation therapy. 01933 is for anesthesia during a therapeutic interventional radiology procedure within the intracranial compartment.
01933 billing questions
When should 01933 be chosen over anesthesia for carotid or cerebral vessel procedures?
01933 is for therapeutic interventional radiology procedures directed within the intracranial compartment. 01925 is for interventional radiological procedures involving carotid or cerebral vessels.
Does 01933 include the radiologist’s procedure?
No. The anesthesia professional reports the anesthesia service, while the interventional radiologist reports the therapeutic procedure.
What should the record show to support 01933?
The operative record should identify the intracranial therapeutic intervention, and the anesthesia record should support the anesthesia practitioner’s service and time.
How are time units calculated for 01933?
Anesthesia time is reported in minutes and converted to 15-minute units, computed to one decimal place. Medicare payment uses 7 base units plus time units, multiplied by the anesthesia conversion factor for the locality.
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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