HRHospitalRates.comCompare prices

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

Enzyme activity test for a non-viral infection

CPT 87905the billing code this page is about

A laboratory test that detects an enzyme produced by bacteria or another non-viral organism in a specimen, such as sialidase activity in vaginal fluid.

Hospitals typically charge $45 cash for this outpatient procedure — the median across 545 hospitals that filed a usable cash price; the average of the middle 60% is $47. Most fall between $18 and $97 (20th–80th percentile).

Hospitals
545
States
44
Filings dated
Jan 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 545 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
$12$22$45$74$148

The most expensive tenth of hospitals charges at least 12× what the cheapest tenth charges ($12 vs $148).

How the prices are spread

$12 – $17: 72 hospitals$12$17 – $24: 61 hospitals$24 – $33: 50 hospitals$24$33 – $46: 68 hospitals$46 – $65: 105 hospitals$46$65 – $91: 49 hospitals$91 – $127: 40 hospitals$91$127 – $178: 33 hospitals$178 – $250: 9 hospitals$178$250 – $350: 10 hospitals$250median $45price bands are equal on a log scale
Hospitals per price band (497 of 545 — the bands cover the 5th to 95th percentile)
FromToHospitals
$12$1772
$17$2461
$24$3350
$33$4668
$46$65105
$65$9149
$91$12740
$127$17833
$178$2509
$250$35010

By state

The median cash price in each state, against the national median of $45.

Alaska: 2 hospitals filed a usable price — fewer than 10, so no figureAKMaine: no hospital in the corpus filed a usable priceMEVermont: 2 hospitals filed a usable price — fewer than 10, so no figureVTNew Hampshire: 8 hospitals filed a usable price — fewer than 10, so no figureNHWashington: median $32 across 20 hospitalsWA$32Idaho: 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: 2 hospitals filed a usable price — fewer than 10, so no figureNDMinnesota: 2 hospitals filed a usable price — fewer than 10, so no figureMNIllinois: median $57 across 36 hospitalsIL$57Wisconsin: median $71 across 19 hospitalsWI$71Michigan: median $17 across 17 hospitalsMI$17New York: median $12 across 18 hospitalsNY$12Massachusetts: 7 hospitals filed a usable price — fewer than 10, so no figureMAOregon: no hospital in the corpus filed a usable priceORNevada: 3 hospitals filed a usable price — fewer than 10, so no figureNVWyoming: 4 hospitals filed a usable price — fewer than 10, so no figureWYSouth Dakota: no hospital in the corpus filed a usable priceSDIowa: median $39 across 15 hospitalsIA$39Indiana: median $31 across 43 hospitalsIN$31Ohio: median $55 across 33 hospitalsOH$55Pennsylvania: median $14 across 29 hospitalsPA$14New Jersey: median $13 across 30 hospitalsNJ$13Connecticut: no hospital in the corpus filed a usable priceCTRhode Island: 1 hospital filed a usable price — fewer than 10, so no figureRICalifornia: median $63 across 38 hospitalsCA$63Utah: 3 hospitals filed a usable price — fewer than 10, so no figureUTColorado: median $36 across 26 hospitalsCO$36Nebraska: 3 hospitals filed a usable price — fewer than 10, so no figureNEMissouri: 4 hospitals filed a usable price — fewer than 10, so no figureMOKentucky: median $37 across 19 hospitalsKY$37West Virginia: 4 hospitals filed a usable price — fewer than 10, so no figureWVVirginia: median $148 across 15 hospitalsVA$148Maryland: 2 hospitals filed a usable price — fewer than 10, so no figureMDDelaware: no hospital in the corpus filed a usable priceDEArizona: 6 hospitals filed a usable price — fewer than 10, so no figureAZNew Mexico: 1 hospital filed a usable price — fewer than 10, so no figureNMKansas: 5 hospitals filed a usable price — fewer than 10, so no figureKSArkansas: no hospital in the corpus filed a usable priceARTennessee: median $21 across 11 hospitalsTN$21North Carolina: 6 hospitals filed a usable price — fewer than 10, so no figureNCSouth Carolina: 3 hospitals filed a usable price — fewer than 10, so no figureSCOklahoma: median $22 across 13 hospitalsOK$22Louisiana: 8 hospitals filed a usable price — fewer than 10, so no figureLAMississippi: 3 hospitals filed a usable price — fewer than 10, so no figureMSAlabama: 6 hospitals filed a usable price — fewer than 10, so no figureALGeorgia: 2 hospitals filed a usable price — fewer than 10, so no figureGAHawaii: 3 hospitals filed a usable price — fewer than 10, so no figureHITexas: median $758 across 28 hospitalsTX$758Florida: median $57 across 38 hospitalsFL$57
Cash price by state, most expensive first. National median $45. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
Texas TX28$758+1580%$53 – $1,188
Virginia VA15$148+228%$21 – $148
Wisconsin WI19$71+57%$71 – $75
California CA38$63+39%$63 – $109
Florida FL38$57+26%$39 – $90
Illinois IL36$57+25%$22 – $149
Ohio OH33$55+21%$42 – $62
Iowa IA15$39−15%$36 – $39
Kentucky KY19$37−19%$17 – $58
Colorado CO26$36−19%$27 – $76
Washington WA20$32−29%$25 – $72
Indiana IN43$31−31%$17 – $51
Oklahoma OK13$22−52%$22 – $26
Tennessee TN11$21−53%$21 – $55
Michigan MI17$17−63%$14 – $28
Pennsylvania PA29$14−69%$8 – $131
New Jersey NJ30$13−70%$12 – $14
New York NY18$12−73%$12 – $19
Louisiana LA8not enough hospitals filed a usable price
New Hampshire NH8not enough hospitals filed a usable price
Massachusetts MA7not enough hospitals filed a usable price
Alabama AL6not enough hospitals filed a usable price
Arizona AZ6not enough hospitals filed a usable price
Idaho ID6not enough hospitals filed a usable price
North Carolina NC6not enough hospitals filed a usable price
Kansas KS5not enough hospitals filed a usable price
Missouri MO4not enough hospitals filed a usable price
West Virginia WV4not enough hospitals filed a usable price
Wyoming WY4not enough hospitals filed a usable price
Hawaii HI3not enough hospitals filed a usable price
Mississippi MS3not enough hospitals filed a usable price
Nebraska NE3not enough hospitals filed a usable price
Nevada NV3not enough hospitals filed a usable price
South Carolina SC3not enough hospitals filed a usable price
Utah UT3not enough hospitals filed a usable price
Alaska AK2not enough hospitals filed a usable price
Georgia GA2not enough hospitals filed a usable price
Maryland MD2not enough hospitals filed a usable price
Minnesota MN2not enough hospitals filed a usable price
North Dakota ND2not enough hospitals filed a usable price
Vermont VT2not enough hospitals filed a usable price
Montana MT1not enough hospitals filed a usable price
New Mexico NM1not enough hospitals filed a usable price
Rhode Island RI1not 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 $45.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care437$42$16 – $83
Children’s6fewer than 20 hospitals
Critical access99$54$28 – $106
Ownership
For-profit87$49$22 – $97
Government63$39$14 – $85
Non-profit392$42$18 – $97
System affiliation
Part of a system469$49$19 – $97
Independent76$37$17 – $89

Cash price vs list price

Median list price (chargemaster)$84
Median cash price$45
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

340 hospitals filed a usable inpatient cash price for this code. The median is $55 and the average of the middle 60% is $55; most fall between $27 and $107.

Cash price percentiles, inpatient, across 340 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
$21$31$55$89$162

The most expensive tenth of hospitals charges at least 7.6× what the cheapest tenth charges ($21 vs $162).

Of the 373 hospitals that filed this code inpatient, 340 gave a usable cash price; 7 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 26 a list price only.

How complete is this

545 of the 3,956 hospitals with a price file in our corpus (14%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 585 hospitals that filed this code at all gave us
Usable cash price — counted545
Cash price carrying a plausibility flag — shown on the compare tool, excluded here11
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 — excluded28
Hospitals that filed this code585

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 4, 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 IA NZMTC ACTV OTH/THN VIRUS.

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, “Enzyme activity test for a non-viral infection (CPT 87905) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-87905-enzyme-activity-test-for-a-non-viral-infection