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CPT 95819: Electroencephalogram, Awake and Asleep Recording
CPT code 95819 denotes an electroencephalogram (EEG) with recordings obtained during both awake and asleep states. This EEG variant provides extended physiologic monitoring to capture state-dependent abnormalities such as seizures or sleep-related epileptiform activity and supports diagnosis and management of neurologic conditions. Nationally, EEGs are a core diagnostic tool in neurology and have implications for care pathways, utilization management, and coverage determinations.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, United Healthcare, and Medicare. Readers will find a concise overview of the clinical context for 95819, the typical sites of service, and how this service fits into related EEG services. The publication also summarizes benchmarks and policy-relevant points affecting coverage and coding practice, and highlights differences between 95819 and related EEG codes used for awake, drowsy, and prolonged recordings.
This summary is intended for clinicians, coding professionals, and policy analysts seeking a national-level briefing on the procedural description, clinical utility, and payer coverage context for CPT code 95819.
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Billing Code Overview
CPT code 95819 describes an electroencephalogram (EEG) performed with recordings during both awake and asleep states. The test uses small electrodes attached to the scalp to measure the brain's electrical activity and is used to evaluate abnormal brain activity, seizures, altered mental status, and other neurologic symptoms.
Service Type: Diagnostic neurophysiology test (EEG) conducted during awake and sleep states
Typical Site of Service: Hospital outpatient department, ambulatory EEG clinic, or inpatient hospital setting where prolonged EEG recording can be performed, depending on clinical need and monitoring requirements.
National Reimbursement Benchmarks
National averages place Medicare at $336.3 and BUCA (an average commercial benchmark) at $481.5, so BUCA’s mean exceeds Medicare by $145.2. This gap highlights a common commercial-to-Medicare premium for CPT 95819, with BUCA closer to higher commercial means like Blue Cross Blue Shield and Cigna than to Medicare’s average.
Looking at dispersion measured as P75 minus P25, Blue Cross Blue Shield has a range of $187.7 (from $376.8 to $655.5), BUCA’s interquartile range is $364.2 (from $265.2 to $616.4), and UnitedHealth Group’s IQR is $505.7 (from $131.5 to $618.2). The tightest IQRs are Aetna at $352.2 and Cigna at $520.0; the widest IQR is UnitedHealth Group at $505.7, indicating substantial variability across major commercial payers versus Medicare’s narrower documented percentiles.