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Extended Electroencephalogram (EEG), Over One Hour

Illinois rates for HCPCS 95813

Sensors placed on the scalp record the brain's electrical activity continuously over a longer session than a routine brain wave test, typically lasting more than an hour. The extra recording time increases the chance of capturing abnormal patterns, such as seizure activity, that might not appear during a shorter test. It is noninvasive and doesn't involve sampling from inside the body.

Rates data updated October 2026.

How much does Extended Electroencephalogram (EEG), Over One Hour cost?

$447

Typical negotiated rate. In Illinois, October 2026.

Insurers have agreed to pay about $447 for this service. The price depends on where it is billed: about $447 from a physician practice, and about $676 from a hospital or other facility.

These are rates insurers have negotiated with providers, not the amount a patient is billed. What you owe depends on your plan's deductible and coinsurance. Based on rates published by 7 insurance carriers under federal price transparency rules.

Prices by location type

Billed byTypicalRange
Physician practiceA doctor's office, clinic or independent provider$447$132 to $692
FacilityA hospital or hospital-owned outpatient department$676$398 to $1,622

How much rates vary

Facilitymedian $676 · 10th to 90th $309 to $3,890Professionalmedian $447 · 10th to 90th $95 to $708
$50$100$200$500$1K$2K$5Kfacility $676professional $447

Distribution of negotiated rates across all payers (price axis is log-scale). Need provider-level prices or 24+ months of history? Contact us.

Rates by insurance carrier

Insurance Carrier
Aetna
Setting
Facility
Modifier
None
Typical Low
$398.11
Median
$588.84
Typical High
$676.08
Aetna
Setting
Professional
Modifier
None (both parts)
Typical Low
$389.05
Median
$446.68
Typical High
$575.44
Aetna
Setting
Professional
Modifier
26 · Professional part
Typical Low
$81.28
Median
$87.10
Typical High
$109.65
Aetna
Setting
Professional
Modifier
TC · Technical part
Typical Low
$295.12
Median
$354.81
Typical High
$457.09
Ambetter
Setting
Professional
Modifier
None (both parts)
Typical Low
$426.58
Median
$426.58
Typical High
$562.34
BCBS Illinois
Setting
Facility
Modifier
None
Typical Low
$309.03
Median
$870.96
Typical High
$4,677.35
BCBS Illinois
Setting
Professional
Modifier
None (both parts)
Typical Low
$95.50
Median
$331.13
Typical High
$707.95
Cigna
Setting
Facility
Modifier
None
Typical Low
$398.11
Median
$660.69
Typical High
$741.31
Cigna
Setting
Professional
Modifier
None (both parts)
Typical Low
$309.03
Median
$562.34
Typical High
$758.58
Cigna
Setting
Professional
Modifier
26 · Professional part
Typical Low
$89.13
Median
$112.20
Typical High
$154.88
Cigna
Setting
Professional
Modifier
TC · Technical part
Typical Low
$208.93
Median
$457.09
Typical High
$616.60
Hally Health
Setting
Professional
Modifier
None
Typical Low
$363.08
Median
$575.44
Typical High
$870.96
Hally Health
Setting
Professional
Modifier
26 · Professional part
Typical Low
$83.18
Median
$117.49
Typical High
$275.42
Hally Health
Setting
Professional
Modifier
TC · Technical part
Typical Low
$263.03
Median
$446.68
Typical High
$616.60
Hally Health
Setting
Facility
Modifier
None
Typical Low
$100.00
Median
$100.00
Typical High
$100.00
Hally Health
Setting
Professional
Modifier
None (both parts)
Typical Low
$512.86
Median
$537.03
Typical High
$575.44
Molina
Setting
Professional
Modifier
None (both parts)
Typical Low
$33.11
Median
$33.11
Typical High
$33.11
United
Setting
Facility
Modifier
None
Typical Low
$512.86
Median
$512.86
Typical High
$575.44
United
Setting
Professional
Modifier
None (both parts)
Typical Low
$346.74
Median
$457.09
Typical High
$812.83
United
Setting
Professional
Modifier
26 · Professional part
Typical Low
$83.18
Median
$109.65
Typical High
$181.97
United
Setting
Professional
Modifier
TC · Technical part
Typical Low
$245.47
Median
$363.08
Typical High
$645.65
2 more rates with less common billing modifiers

A modifier changes what was billed, for example a reduced or repeated service. Each of these modifiers carries under 10% of the published rates for this code. Modifier combinations, and modifiers with fewer than 30 rates for a carrier, are not listed.

Insurance Carrier
Aetna
Setting
Professional
Modifier
52 · Reduced service
Typical Low
$199.53
Median
$218.78
Typical High
$218.78
Aetna
Setting
Professional
Modifier
53 · Discontinued
Typical Low
$79.43
Median
$89.13
Typical High
$89.13

Where Illinois sits

The same service costs 3.2 times more in Alaska than in New Mexico. Every bar is a state, most expensive first. Touch or drag across it to read any state, then open that state for its carriers and full range.

Illinois· 30th of 51

$447

AK $977NM $302

Median negotiated rate in each state, from every insurer that publishes one. States where no insurer publishes a rate for this service are not shown.