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Extended EEG Brain Wave Monitoring

Illinois rates for HCPCS 95812

This test records the brain's electrical activity using scalp electrodes over a longer period than a routine EEG, increasing the chance of capturing abnormal patterns, such as those linked to seizures, that might not appear during a brief recording. The extended recording time allows the patient to pass through more of a natural sleep-wake cycle while brain activity is continuously tracked. It falls between a standard-length EEG and a more prolonged, multi-hour or overnight monitoring study.

Rates data updated October 2026.

How much does Extended EEG Brain Wave Monitoring cost?

$355

Typical negotiated rate. In Illinois, October 2026.

Insurers have agreed to pay about $355 for this service. The price depends on where it is billed: about $355 from a physician practice, and about $575 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$355$87.10 to $550
FacilityA hospital or hospital-owned outpatient department$575$324 to $871

How much rates vary

Facilitymedian $575 · 10th to 90th $275 to $2,951Professionalmedian $355 · 10th to 90th $63 to $562
$50$100$200$500$1K$2K$5Kfacility $575professional $355

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
$331.13
Median
$616.60
Typical High
$630.96
Aetna
Setting
Facility
Modifier
26 · Professional part
Typical Low
$53.70
Median
$97.72
Typical High
$100.00
Aetna
Setting
Facility
Modifier
TC · Technical part
Typical Low
$281.84
Median
$512.86
Typical High
$524.81
Aetna
Setting
Professional
Modifier
None (both parts)
Typical Low
$323.59
Median
$354.81
Typical High
$467.74
Aetna
Setting
Professional
Modifier
26 · Professional part
Typical Low
$53.70
Median
$57.54
Typical High
$72.44
Aetna
Setting
Professional
Modifier
TC · Technical part
Typical Low
$263.03
Median
$302.00
Typical High
$389.05
Ambetter
Setting
Professional
Modifier
None (both parts)
Typical Low
$338.84
Median
$354.81
Typical High
$354.81
BCBS Illinois
Setting
Facility
Modifier
None
Typical Low
$275.42
Median
$575.44
Typical High
$3,311.31
BCBS Illinois
Setting
Professional
Modifier
None (both parts)
Typical Low
$63.10
Median
$218.78
Typical High
$562.34
Cigna
Setting
Facility
Modifier
None
Typical Low
$398.11
Median
$616.60
Typical High
$660.69
Cigna
Setting
Professional
Modifier
None (both parts)
Typical Low
$239.88
Median
$446.68
Typical High
$602.56
Cigna
Setting
Professional
Modifier
26 · Professional part
Typical Low
$58.88
Median
$74.13
Typical High
$102.33
Cigna
Setting
Professional
Modifier
TC · Technical part
Typical Low
$177.83
Median
$380.19
Typical High
$512.86
Hally Health
Setting
Professional
Modifier
None
Typical Low
$288.40
Median
$446.68
Typical High
$741.31
Hally Health
Setting
Professional
Modifier
26 · Professional part
Typical Low
$54.95
Median
$77.62
Typical High
$165.96
Hally Health
Setting
Professional
Modifier
TC · Technical part
Typical Low
$234.42
Median
$371.54
Typical High
$562.34
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
$407.38
Median
$416.87
Typical High
$446.68
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
$281.84
Median
$380.19
Typical High
$676.08
United
Setting
Professional
Modifier
26 · Professional part
Typical Low
$52.48
Median
$69.18
Typical High
$120.23
United
Setting
Professional
Modifier
TC · Technical part
Typical Low
$218.78
Median
$323.59
Typical High
$562.34
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
$158.49
Median
$177.83
Typical High
$177.83
Aetna
Setting
Professional
Modifier
53 · Discontinued
Typical Low
$64.57
Median
$70.79
Typical High
$70.79

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· 34th of 51

$355

AK $776NM $240

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.