Summary & Overview
CPT 95957: Computer-Based Analysis of Electroencephalogram
CPT code 95957 denotes a computer-based analysis of an electroencephalogram (EEG), a neurodiagnostic procedure that applies computational algorithms to EEG recordings to quantify waveforms and support clinical interpretation. This code matters nationally because computer-assisted EEG analysis is increasingly used to improve detection of seizure activity, characterize sleep and encephalopathic patterns, and standardize reporting across facilities. Its use affects billing for neurodiagnostic services in hospitals, ambulatory EEG centers, and inpatient neurology units.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of what 95957 represents, expected sites of service, and the clinical context in which computer-based EEG analysis is applied. The publication provides operational benchmarks where available, outlines common billing modifiers and their use cases, maps typical clinical scenarios tied to EEG analysis, and highlights policy and documentation considerations that influence coverage and claim adjudication nationally. Data gaps in the input are noted as unavailable; the content focuses on clear description, coding context, and payer relevance for stakeholders involved in neurodiagnostic service delivery and revenue cycle management.
Billing Code Overview
CPT code 95957 describes a computer-based analysis of an electroencephalogram (EEG). The procedure involves automated or semi-automated computational processing of EEG waveforms to extract quantitative measures, detect patterns, and assist clinical interpretation.
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Service type: Neurodiagnostic analysis and interpretation
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Typical site of service: Hospital outpatient departments, inpatient neurology services, dedicated neurodiagnostic laboratories, and ambulatory EEG centers
Clinical & Coding Specifications
Clinical Context
A typical patient is a 28-year-old adult referred by neurology for computer-based analysis of a routine or prolonged electroencephalogram. Indications include evaluation of new-onset seizures, change in seizure frequency, altered mental status, suspected nonconvulsive status epilepticus, or pre-surgical epilepsy mapping. The EEG technologist performs the recording (routine 20–60 minutes or extended 24–72 hour ambulatory monitoring) with standard electrode placement; the interpreting physician (often a neurologist or clinical neurophysiologist) later performs a software-assisted quantitative review and reporting of EEG data using automated algorithms for spike detection, frequency analysis, and trend reports. The workflow typically includes: scheduling and consent, electrode application, EEG acquisition, artifact review, computer-based signal processing and quantitative analysis, physician review of the computer outputs, and generation of a formal report documenting interpretation and clinical correlation.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the physician interpretation/analysis portion separate from technical EEG recording. |
TC | Technical component |