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Procedure price report · Electroencephalogram (EEG)

Wada test of brain hemisphere function with EEG

CPT 95958the billing code this page is about

Brain wave recording combined with injection of medication into a brain artery to test language and memory function on one side of the brain.

Hospitals typically charge $1,233 cash for this outpatient procedure — the median across 758 hospitals that filed a usable cash price; the average of the middle 60% is $1,332. Most fall between $572 and $2,303 (20th–80th percentile).

Hospitals
758
States
50
Filings dated
Feb 2024 – Sep 2026
Computed
September 25, 2026
Prices checked
through September 25, 2026

Median: half of hospitals filed less, half more — and it is a price some hospital actually filed. Average of the middle 60%: the mean of the prices between the 20th and 80th percentiles. We never publish the plain average, the lowest or the highest price: the extremes in hospital price files are chargemaster artefacts, not prices anyone pays.

What hospitals charge, from cheapest to most expensive

Cash price percentiles, outpatient, across 758 hospitals. Each figure is a price a hospital filed. 10th: one in ten hospitals charges less; 25th: a quarter charge less; Median: half charge less; 75th: three quarters charge less; 90th: nine in ten charge less.
10th25thMedian75th90th
$433$661$1,233$2,093$3,317

The most expensive tenth of hospitals charges at least 7.7× what the cheapest tenth charges ($433 vs $3,317).

How the prices are spread

$308 – $405: 26 hospitals$308$405 – $534: 68 hospitals$534 – $703: 65 hospitals$534$703 – $926: 67 hospitals$926 – $1,220: 115 hospitals$926$1,220 – $1,607: 83 hospitals$1,607 – $2,117: 108 hospitals$1,607$2,117 – $2,788: 82 hospitals$2,788 – $3,672: 39 hospitals$2,788$3,672 – $4,836: 32 hospitals$3,672median $1,233price bands are equal on a log scale
Hospitals per price band (685 of 758 — the bands cover the 5th to 95th percentile)
FromToHospitals
$308$40526
$405$53468
$534$70365
$703$92667
$926$1,220115
$1,220$1,60783
$1,607$2,117108
$2,117$2,78882
$2,788$3,67239
$3,672$4,83632

Against Medicare

Medicare pays (OPPS 2026, national rate)$877
Median cash price$1,233
Cash as a multiple of Medicare1.41×

The Medicare figure is the national unadjusted OPPS rate for this code — what Medicare itself pays a hospital before local wage adjustment. It is a benchmark, not a price anyone is charged.

By state

The median cash price in each state, against the national median of $1,233.

Alaska: 2 hospitals filed a usable price — fewer than 10, so no figureAKMaine: 2 hospitals filed a usable price — fewer than 10, so no figureMEVermont: 2 hospitals filed a usable price — fewer than 10, so no figureVTNew Hampshire: 4 hospitals filed a usable price — fewer than 10, so no figureNHWashington: median $1,558 across 29 hospitalsWA$1,558Idaho: 6 hospitals filed a usable price — fewer than 10, so no figureIDMontana: 1 hospital filed a usable price — fewer than 10, so no figureMTNorth Dakota: 1 hospital filed a usable price — fewer than 10, so no figureNDMinnesota: median $824 across 17 hospitalsMN$824Illinois: median $708 across 33 hospitalsIL$708Wisconsin: median $501 across 18 hospitalsWI$501Michigan: median $1,181 across 31 hospitalsMI$1,181New York: median $1,204 across 30 hospitalsNY$1,204Massachusetts: 7 hospitals filed a usable price — fewer than 10, so no figureMAOregon: median $1,836 across 12 hospitalsOR$1,836Nevada: 4 hospitals filed a usable price — fewer than 10, so no figureNVWyoming: 2 hospitals filed a usable price — fewer than 10, so no figureWYSouth Dakota: 5 hospitals filed a usable price — fewer than 10, so no figureSDIowa: median $507 across 14 hospitalsIA$507Indiana: median $1,580 across 13 hospitalsIN$1,580Ohio: median $1,755 across 46 hospitalsOH$1,755Pennsylvania: median $1,193 across 36 hospitalsPA$1,193New Jersey: median $1,198 across 28 hospitalsNJ$1,198Connecticut: 2 hospitals filed a usable price — fewer than 10, so no figureCTRhode Island: 3 hospitals filed a usable price — fewer than 10, so no figureRICalifornia: median $2,441 across 62 hospitalsCA$2,441Utah: 4 hospitals filed a usable price — fewer than 10, so no figureUTColorado: median $1,088 across 22 hospitalsCO$1,088Nebraska: 8 hospitals filed a usable price — fewer than 10, so no figureNEMissouri: median $1,494 across 14 hospitalsMO$1,494Kentucky: median $1,721 across 14 hospitalsKY$1,721West Virginia: 6 hospitals filed a usable price — fewer than 10, so no figureWVVirginia: median $572 across 24 hospitalsVA$572Maryland: 4 hospitals filed a usable price — fewer than 10, so no figureMDDelaware: 2 hospitals filed a usable price — fewer than 10, so no figureDEArizona: median $678 across 12 hospitalsAZ$678New Mexico: 1 hospital filed a usable price — fewer than 10, so no figureNMKansas: 7 hospitals filed a usable price — fewer than 10, so no figureKSArkansas: 3 hospitals filed a usable price — fewer than 10, so no figureARTennessee: median $258 across 10 hospitalsTN$258North Carolina: median $1,166 across 16 hospitalsNC$1,166South Carolina: median $2,289 across 18 hospitalsSC$2,289Oklahoma: median $433 across 16 hospitalsOK$433Louisiana: median $395 across 13 hospitalsLA$395Mississippi: 2 hospitals filed a usable price — fewer than 10, so no figureMSAlabama: 5 hospitals filed a usable price — fewer than 10, so no figureALGeorgia: median $1,601 across 17 hospitalsGA$1,601Hawaii: 3 hospitals filed a usable price — fewer than 10, so no figureHITexas: median $1,127 across 75 hospitalsTX$1,127Florida: median $1,705 across 52 hospitalsFL$1,705
Cash price by state, most expensive first. National median $1,233. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
California CA62$2,441+98%$1,581 – $3,030
South Carolina SC18$2,289+86%$493 – $2,289
Oregon OR12$1,836+49%$500 – $2,890
Ohio OH46$1,755+42%$680 – $2,747
Kentucky KY14$1,721+40%$604 – $2,181
Florida FL52$1,705+38%$1,053 – $2,573
Georgia GA17$1,601+30%$1,601 – $4,991
Indiana IN13$1,580+28%$1,383 – $2,181
Washington WA29$1,558+26%$553 – $1,731
Missouri MO14$1,494+21%$1,020 – $1,790
New York NY30$1,204−2%$1,000 – $1,743
New Jersey NJ28$1,198−3%$1,111 – $3,418
Pennsylvania PA36$1,193−3%$144 – $2,837
Michigan MI31$1,181−4%$739 – $1,820
North Carolina NC16$1,166−5%$584 – $1,166
Texas TX75$1,127−9%$445 – $1,772
Colorado CO22$1,088−12%$658 – $1,879
Minnesota MN17$824−33%$767 – $1,186
Illinois IL33$708−43%$412 – $1,992
Arizona AZ12$678−45%$426 – $1,054
Virginia VA24$572−54%$549 – $830
Iowa IA14$507−59%$507 – $639
Wisconsin WI18$501−59%$417 – $1,570
Oklahoma OK16$433−65%$433 – $1,388
Louisiana LA13$395−68%$304 – $657
Tennessee TN10$258−79%$157 – $504
Nebraska NE8not enough hospitals filed a usable price
Kansas KS7not enough hospitals filed a usable price
Massachusetts MA7not enough hospitals filed a usable price
Idaho ID6not enough hospitals filed a usable price
West Virginia WV6not enough hospitals filed a usable price
Alabama AL5not enough hospitals filed a usable price
South Dakota SD5not enough hospitals filed a usable price
Maryland MD4not enough hospitals filed a usable price
New Hampshire NH4not enough hospitals filed a usable price
Nevada NV4not enough hospitals filed a usable price
Utah UT4not enough hospitals filed a usable price
Arkansas AR3not enough hospitals filed a usable price
Hawaii HI3not enough hospitals filed a usable price
Rhode Island RI3not enough hospitals filed a usable price
Alaska AK2not enough hospitals filed a usable price
Connecticut CT2not enough hospitals filed a usable price
Delaware DE2not enough hospitals filed a usable price
Maine ME2not enough hospitals filed a usable price
Mississippi MS2not enough hospitals filed a usable price
Vermont VT2not enough hospitals filed a usable price
Wyoming WY2not enough hospitals filed a usable price
Montana MT1not enough hospitals filed a usable price
North Dakota ND1not enough hospitals filed a usable price
New Mexico NM1not enough hospitals filed a usable price

Hospitals like yours

The same distribution cut by the kind of hospital. Hospital type and ownership come from CMS; a hospital counts as part of a system when its price file is shared with at least one other hospital under the same brand. The national median is $1,233.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care670$1,204$572 – $2,289
Children’s35$1,682$893 – $2,842
Critical access50$1,249$445 – $2,235
Ownership
For-profit61$1,570$594 – $2,775
Government76$1,166$543 – $1,879
Non-profit618$1,358$572 – $2,441
System affiliation
Part of a system696$1,334$572 – $2,370
Independent62$1,099$545 – $1,981

Cash price vs list price

Median list price (chargemaster)$2,448
Median cash price$1,233
Cash as a share of list, median hospital60%

At the typical hospital, asking for the cash price cuts the list price by about 40%. The share is the median of each hospital’s own cash ÷ list ratio, over hospitals that filed both — not the ratio of the two medians above.

The same procedure, inpatient

573 hospitals filed a usable inpatient cash price for this code. The median is $1,494 and the average of the middle 60% is $1,398; most fall between $564 and $2,441.

Cash price percentiles, inpatient, across 573 hospitals. Each figure is a price a hospital filed. 10th: one in ten hospitals charges less; 25th: a quarter charge less; Median: half charge less; 75th: three quarters charge less; 90th: nine in ten charge less.
10th25thMedian75th90th
$433$644$1,494$2,134$3,243

The most expensive tenth of hospitals charges at least 7.5× what the cheapest tenth charges ($433 vs $3,243).

Of the 605 hospitals that filed this code inpatient, 573 gave a usable cash price; 7 carried a plausibility flag, 1 filed a number their own filing marks as not a price, 0 gave an estimate, and 24 a list price only.

How complete is this

758 of the 3,956 hospitals with a price file in our corpus (19%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 789 hospitals that filed this code at all gave us
Usable cash price — counted758
Cash price carrying a plausibility flag — shown on the compare tool, excluded here7
A number the filing itself marks as not a price (a placeholder, a ratio) — excluded0
An estimate rather than a filed cash price — excluded0
A list price only, no cash figure — excluded24
Hospitals that filed this code789

Sections not shown for this setting

  • Since our last snapshot: there is no earlier snapshot at least 90 days older than this one yet.

We last checked these hospitals’ price files for changes between September 4, 2026 and September 25, 2026; the figures were computed September 25, 2026 from filings loaded through September 25, 2026. The percentiles and averages use only the “counted” row.

Related procedures

Part of the Electroencephalogram (EEG) family.

Hospitals file this code under descriptions such as Wada Activation Test Hemispheric Function W/Eeg.

Method

Source
The machine-readable price files every U.S. hospital is required by CMS to publish, parsed per hospital. Nothing is surveyed, sampled or modelled.
What counts
One cash (self-pay) price per hospital for this code and setting. A hospital’s own filing can rule its number out — a placeholder, a “not applicable” note, a list price standing in for cash — and our plausibility checks can flag a price far below what every other hospital files. Both kinds are disclosed above and excluded from the statistics; on the compare tool a flagged price is still shown.
Statistics
Percentiles are discrete: each is a price some hospital filed. The average is the mean of the prices between the 20th and 80th percentiles. We never publish the plain mean, the minimum or the maximum. A state needs 10 hospitals and a segment 20 to show a figure; otherwise the row shows its count and no number. Medicare is the national unadjusted OPPS rate where one exists.
Names
Procedure names on these pages are our own plain-language titles, not the AMA’s copyrighted CPT descriptors. The code is the identity.

The full rules — sources, statistics, thresholds, limitations — are on the methodology page.

Download this page’s figures: JSON · CSV. Aggregates only — the per-hospital prices are on the compare tool.

Cite: HospitalRates.com, “Wada test of brain hemisphere function with EEG (CPT 95958) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-95958-wada-test-of-brain-hemisphere-function-with-eeg