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Extended Electroencephalogram (EEG), Over One Hour

Maryland 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?

$437

Typical negotiated rate. In Maryland, October 2026.

Insurers have agreed to pay about $437 for this service. Most negotiated rates run $417 to $501.

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 6 insurance carriers under federal price transparency rules.

How much rates vary

Facilitymedian $501 · 10th to 90th $501 to $603Professionalmedian $437 · 10th to 90th $331 to $617
$200$500$1Kfacility $501professional $437

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

Rates by insurance carrier

Insurance Carrier
Aetna
Setting
Facility
Modifier
None
Typical Low
$501.19
Median
$501.19
Typical High
$602.56
Aetna
Setting
Professional
Modifier
None (both parts)
Typical Low
$407.38
Median
$436.52
Typical High
$524.81
Aetna
Setting
Professional
Modifier
26 · Professional part
Typical Low
$75.86
Median
$79.43
Typical High
$95.50
Aetna
Setting
Professional
Modifier
TC · Technical part
Typical Low
$323.59
Median
$354.81
Typical High
$426.58
CareFirst
Setting
Professional
Modifier
None (both parts)
Typical Low
$416.87
Median
$457.09
Typical High
$501.19
CareFirst
Setting
Professional
Modifier
26 · Professional part
Typical Low
$81.28
Median
$89.13
Typical High
$89.13
CareFirst
Setting
Professional
Modifier
TC · Technical part
Typical Low
$371.54
Median
$371.54
Typical High
$426.58
Cigna
Setting
Professional
Modifier
None (both parts)
Typical Low
$363.08
Median
$426.58
Typical High
$891.25
Cigna
Setting
Professional
Modifier
26 · Professional part
Typical Low
$72.44
Median
$89.13
Typical High
$177.83
Cigna
Setting
Professional
Modifier
TC · Technical part
Typical Low
$302.00
Median
$346.74
Typical High
$741.31
Kaiser Permanente
Setting
Professional
Modifier
None
Typical Low
$363.08
Median
$562.34
Typical High
$794.33
Kaiser Permanente
Setting
Professional
Modifier
26 · Professional part
Typical Low
$63.10
Median
$97.72
Typical High
$144.54
Kaiser Permanente
Setting
Professional
Modifier
TC · Technical part
Typical Low
$302.00
Median
$457.09
Typical High
$645.65
United
Setting
Professional
Modifier
None (both parts)
Typical Low
$239.88
Median
$426.58
Typical High
$1,071.52
United
Setting
Professional
Modifier
26 · Professional part
Typical Low
$66.07
Median
$100.00
Typical High
$218.78
United
Setting
Professional
Modifier
TC · Technical part
Typical Low
$181.97
Median
$338.84
Typical High
$851.14
Wellpoint
Setting
Professional
Modifier
None (both parts)
Typical Low
$331.13
Median
$331.13
Typical High
$812.83
Wellpoint
Setting
Professional
Modifier
26 · Professional part
Typical Low
$60.26
Median
$60.26
Typical High
$141.25
Wellpoint
Setting
Professional
Modifier
TC · Technical part
Typical Low
$269.15
Median
$269.15
Typical High
$676.08
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
$204.17
Median
$213.80
Typical High
$218.78
Aetna
Setting
Professional
Modifier
53 · Discontinued
Typical Low
$81.28
Median
$85.11
Typical High
$87.10

Where Maryland 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.

Maryland· 36th of 51

$437

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.