CPT 95940: Intraoperative Neurophysiology Monitoring
CPT 95940 covers continuous intraoperative neurophysiology monitoring requiring one-on-one personal attendance, per 15 minutes.
Billing 95940 Correctly
CPT 95940 covers continuous intraoperative neurophysiology monitoring requiring one-on-one personal attendance, per 15 minutes.
Source: AMA CPT and CMS billing guidance, verified 2026-09-11
95940 in Detail
CPT 95940 reports continuous intraoperative neurophysiology monitoring where the professional is personally present and dedicated to one case, billed in 15 minute units. Both conditions are in the descriptor and both are checked.
Because it is time based, monitoring start and stop times must be documented and the units billed must match. Monitoring several rooms simultaneously does not satisfy the one-on-one requirement. The evoked potential code often billed with it is 95938. Cases are worked through neurosurgery billing, and the facility side runs through hospital billing services.
Using 95940 Correctly
Documentation Requirements
Ensure clinical notes clearly support the level of service, procedure performed, and medical necessity for this CPT code.
Modifier Requirements
Determine whether any modifiers are required for this code, particularly in bilateral, assistant surgeon, or multiple procedure scenarios.
Payer-Specific Rules
Check payer fee schedules and coverage policies, as reimbursement and coverage rules for this code vary by payer.
Bundling Considerations
Review NCCI edits to confirm this code is not bundled with other procedures billed on the same date of service.
95940 Reference
| Field | Details |
|---|---|
| CPT Code | 95940 |
| Official Descriptor | Continuous intraoperative neurophysiology monitoring in the operating room, one on one monitoring requiring personal attendance, each 15 minutes. |
| What It Covers | Continuous neurophysiologic monitoring performed in the operating room with the monitoring professional personally attending, billed in 15 minute units. |
| One-on-One Requirement | The descriptor requires personal attendance and one-on-one monitoring. Remote or simultaneous monitoring of several cases does not meet this definition and is reported differently. |
| Time Documentation | Because the code is time based, the monitoring start and stop times must be documented. Units billed have to match the documented duration. |
| Separate From the Baseline Study | The diagnostic studies establishing baselines are reported separately from the monitoring time itself where the payer permits. |
| Common Denial Cause | Billing units that exceed documented monitoring time, or reporting one-on-one monitoring where the professional was covering multiple operating rooms. |
Source: AMA CPT and CMS billing guidance, verified 2026-09-11
Related Billing Resources
95940, Frequently Asked Questions
Continuous intraoperative neurophysiology monitoring in the operating room, one on one monitoring requiring personal attendance, each 15 minutes.
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