CPT code 95955: Intraoperative EEG, during surgery2026 Medicare rate & RVUs

Medicare pays $197.73 for 95955 nationally in the office. Local office rates run $173.89–$272.75.

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

What 95955 covers

This service records and interprets cerebral electrical activity during an operation. A classic setting is carotid endarterectomy, where EEG changes can help identify possible cerebral ischemia during carotid clamping. Scalp electrodes capture the tracing while the patient is under anesthesia; a neurologist or other qualified physician interprets the recording, with technical staff supporting electrode placement and recording in the operating room.

Report 95955 for the intraoperative EEG service, not for motor or sensory evoked-potential monitoring alone. The operative and EEG documentation should identify the procedure, monitoring period, recording and interpretation, and clinically relevant findings. CMS recognizes separately priced professional and technical components: use modifier 26 for interpretation, modifier TC for equipment and staff, or neither modifier when billing the global service. CMS lists no add-on status, global period, or multiple-procedure reduction for this code.

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 95955 pays more and less

The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.

109 of 109 payment localities

95955 rates by state

Office rate range in each state. Select a state to see its payment localities.

How the 95955 rate is calculated

Each of 95955’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.

Payment rules and modifiers for 95955

The CMS indicators that decide how 95955 is paid alongside other services.

What modifiers do to the payment

When to use modifier 26

95955 compared with similar codes

How to choose

95954EEG activationMedication-provoked

95955 is for EEG during surgery. 95954 describes EEG monitoring associated with drug administration, not intraoperative monitoring simply because drugs are used during anesthesia.

95957EEG analysisDigital analysis

95955 covers intraoperative EEG. 95957 represents digital analysis of EEG data, a distinct service rather than the surgical EEG service itself.

95940Intraoperative monitoringOne-on-one, in operating room

95955 identifies the intraoperative EEG diagnostic test. 95940 describes intraoperative neurophysiology monitoring time in the operating room; it is not an EEG test code.

95941Remote IONMHourly or multiple-patient

95955 is the intraoperative EEG service. 95941 concerns remote or multiple-patient intraoperative neurophysiology monitoring time, not the EEG recording itself.

Codes related to 95955

Related codes aren’t interchangeable: bill the code that matches the service performed.

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

Open CMS sourceHow we calculate rates