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Procedure price report · Microscopic examination (bacterial smear, culture, toxicology)

E. coli O157 antigen test (enzyme immunoassay)

CPT 87335the billing code this page is about

Laboratory test that detects antigen of Escherichia coli O157 bacteria in a stool sample using an enzyme immunoassay.

Hospitals typically charge $38 cash for this outpatient procedure — the median across 391 hospitals that filed a usable cash price; the average of the middle 60% is $45. Most fall between $16 and $90 (20th–80th percentile).

Hospitals
391
States
43
Filings dated
Jun 2024 – Sep 2026
Computed
September 25, 2026
Prices checked
through September 24, 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 391 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
$13$17$38$81$123

The most expensive tenth of hospitals charges at least 9.7× what the cheapest tenth charges ($13 vs $123).

How the prices are spread

$12 – $16: 62 hospitals$12$16 – $21: 38 hospitals$21 – $27: 32 hospitals$21$27 – $35: 42 hospitals$35 – $46: 26 hospitals$35$46 – $60: 21 hospitals$60 – $79: 49 hospitals$60$79 – $104: 34 hospitals$104 – $136: 37 hospitals$104$136 – $178: 15 hospitals$136median $38price bands are equal on a log scale
Hospitals per price band (356 of 391 — the bands cover the 5th to 95th percentile)
FromToHospitals
$12$1662
$16$2138
$21$2732
$27$3542
$35$4626
$46$6021
$60$7949
$79$10434
$104$13637
$136$17815

By state

The median cash price in each state, against the national median of $38.

Alaska: 1 hospital filed a usable price — fewer than 10, so no figureAKMaine: 3 hospitals filed a usable price — fewer than 10, so no figureMEVermont: 1 hospital filed a usable price — fewer than 10, so no figureVTNew Hampshire: 3 hospitals filed a usable price — fewer than 10, so no figureNHWashington: 2 hospitals filed a usable price — fewer than 10, so no figureWAIdaho: 4 hospitals filed a usable price — fewer than 10, so no figureIDMontana: no hospital in the corpus filed a usable priceMTNorth Dakota: no hospital in the corpus filed a usable priceNDMinnesota: 1 hospital filed a usable price — fewer than 10, so no figureMNIllinois: median $31 across 15 hospitalsIL$31Wisconsin: no hospital in the corpus filed a usable priceWIMichigan: 7 hospitals filed a usable price — fewer than 10, so no figureMINew York: median $13 across 21 hospitalsNY$13Massachusetts: 4 hospitals filed a usable price — fewer than 10, so no figureMAOregon: 2 hospitals filed a usable price — fewer than 10, so no figureORNevada: 3 hospitals filed a usable price — fewer than 10, so no figureNVWyoming: 2 hospitals filed a usable price — fewer than 10, so no figureWYSouth Dakota: no hospital in the corpus filed a usable priceSDIowa: median $32 across 16 hospitalsIA$32Indiana: 2 hospitals filed a usable price — fewer than 10, so no figureINOhio: 3 hospitals filed a usable price — fewer than 10, so no figureOHPennsylvania: median $12 across 20 hospitalsPA$12New Jersey: median $14 across 24 hospitalsNJ$14Connecticut: no hospital in the corpus filed a usable priceCTRhode Island: 3 hospitals filed a usable price — fewer than 10, so no figureRICalifornia: median $113 across 40 hospitalsCA$113Utah: no hospital in the corpus filed a usable priceUTColorado: 2 hospitals filed a usable price — fewer than 10, so no figureCONebraska: 3 hospitals filed a usable price — fewer than 10, so no figureNEMissouri: median $75 across 17 hospitalsMO$75Kentucky: 3 hospitals filed a usable price — fewer than 10, so no figureKYWest Virginia: 1 hospital filed a usable price — fewer than 10, so no figureWVVirginia: median $178 across 10 hospitalsVA$178Maryland: 4 hospitals filed a usable price — fewer than 10, so no figureMDDelaware: no hospital in the corpus filed a usable priceDEArizona: 4 hospitals filed a usable price — fewer than 10, so no figureAZNew Mexico: 2 hospitals filed a usable price — fewer than 10, so no figureNMKansas: 6 hospitals filed a usable price — fewer than 10, so no figureKSArkansas: 9 hospitals filed a usable price — fewer than 10, so no figureARTennessee: median $35 across 10 hospitalsTN$35North Carolina: 1 hospital filed a usable price — fewer than 10, so no figureNCSouth Carolina: 4 hospitals filed a usable price — fewer than 10, so no figureSCOklahoma: median $28 across 27 hospitalsOK$28Louisiana: median $28 across 10 hospitalsLA$28Mississippi: median $32 across 19 hospitalsMS$32Alabama: 4 hospitals filed a usable price — fewer than 10, so no figureALGeorgia: median $17 across 17 hospitalsGA$17Hawaii: 3 hospitals filed a usable price — fewer than 10, so no figureHITexas: median $81 across 33 hospitalsTX$81Florida: median $25 across 25 hospitalsFL$25
Cash price by state, most expensive first. National median $38. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
Virginia VA10$178+368%$65 – $178
California CA40$113+198%$75 – $113
Texas TX33$81+112%$50 – $366
Missouri MO17$75+97%$64 – $94
Tennessee TN10$35−9%$16 – $38
Iowa IA16$32−16%$32 – $111
Mississippi MS19$32−16%$13 – $60
Illinois IL15$31−19%$16 – $68
Oklahoma OK27$28−26%$22 – $77
Louisiana LA10$28−26%$16 – $29
Florida FL25$25−35%$22 – $43
Georgia GA17$17−57%$17 – $17
New Jersey NJ24$14−63%$13 – $14
New York NY21$13−67%$13 – $49
Pennsylvania PA20$12−68%$8 – $15
Arkansas AR9not enough hospitals filed a usable price
Michigan MI7not enough hospitals filed a usable price
Kansas KS6not enough hospitals filed a usable price
Alabama AL4not enough hospitals filed a usable price
Arizona AZ4not enough hospitals filed a usable price
Idaho ID4not enough hospitals filed a usable price
Massachusetts MA4not enough hospitals filed a usable price
Maryland MD4not enough hospitals filed a usable price
South Carolina SC4not enough hospitals filed a usable price
Hawaii HI3not enough hospitals filed a usable price
Kentucky KY3not enough hospitals filed a usable price
Maine ME3not enough hospitals filed a usable price
Nebraska NE3not enough hospitals filed a usable price
New Hampshire NH3not enough hospitals filed a usable price
Nevada NV3not enough hospitals filed a usable price
Ohio OH3not enough hospitals filed a usable price
Rhode Island RI3not enough hospitals filed a usable price
Colorado CO2not enough hospitals filed a usable price
Indiana IN2not enough hospitals filed a usable price
New Mexico NM2not enough hospitals filed a usable price
Oregon OR2not enough hospitals filed a usable price
Washington WA2not enough hospitals filed a usable price
Wyoming WY2not enough hospitals filed a usable price
Alaska AK1not enough hospitals filed a usable price
Minnesota MN1not enough hospitals filed a usable price
North Carolina NC1not enough hospitals filed a usable price
Vermont VT1not enough hospitals filed a usable price
West Virginia WV1not 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 $38.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care323$32$14 – $81
Children’s4fewer than 20 hospitals
Critical access63$76$50 – $123
Ownership
For-profit66$38$17 – $207
Government45$49$13 – $105
Non-profit279$36$15 – $85
System affiliation
Part of a system333$37$15 – $92
Independent58$47$16 – $90

Cash price vs list price

Median list price (chargemaster)$105
Median cash price$38
Cash as a share of list, median hospital59%

At the typical hospital, asking for the cash price cuts the list price by about 41%. 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

219 hospitals filed a usable inpatient cash price for this code. The median is $42 and the average of the middle 60% is $49; most fall between $18 and $90.

Cash price percentiles, inpatient, across 219 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
$16$22$42$81$125

The most expensive tenth of hospitals charges at least 7.6× what the cheapest tenth charges ($16 vs $125).

Of the 244 hospitals that filed this code inpatient, 219 gave a usable cash price; 11 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 14 a list price only.

How complete is this

391 of the 3,956 hospitals with a price file in our corpus (10%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 420 hospitals that filed this code at all gave us
Usable cash price — counted391
Cash price carrying a plausibility flag — shown on the compare tool, excluded here15
A number the filing itself marks as not a price (a placeholder, a ratio) — excluded1
An estimate rather than a filed cash price — excluded0
A list price only, no cash figure — excluded13
Hospitals that filed this code420

Sections not shown for this setting

  • Against Medicare: Medicare has no separately payable national outpatient (OPPS) rate for this code, so there is nothing honest to compare against.
  • 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 5, 2026 and September 24, 2026; the figures were computed September 25, 2026 from filings loaded through September 24, 2026. The percentiles and averages use only the “counted” row.

Related procedures

Part of the Microscopic examination (bacterial smear, culture, toxicology) family.

Hospitals file this code under descriptions such as E COLI 0157 AG IA.

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, “E. coli O157 antigen test (enzyme immunoassay) (CPT 87335) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-87335-e-coli-o157-antigen-test-enzyme-immunoassay