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Procedure price report · Other Laboratory

Rapid single-step antibody test for an infection

CPT 86318the billing code this page is about

A single-step laboratory test that detects whether antibodies to an infectious organism are present, reported as positive or negative rather than as a numeric level.

Hospitals typically charge $56 cash for this outpatient procedure — the median across 820 hospitals that filed a usable cash price; the average of the middle 60% is $62. Most fall between $26 and $113 (20th–80th percentile).

Hospitals
820
States
48
Filings dated
Dec 2022 – 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 820 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
$19$32$56$104$159

The most expensive tenth of hospitals charges at least 8.3× what the cheapest tenth charges ($19 vs $159).

How the prices are spread

$17 – $22: 84 hospitals$17$22 – $28: 60 hospitals$28 – $36: 62 hospitals$28$36 – $47: 94 hospitals$47 – $59: 97 hospitals$47$59 – $76: 56 hospitals$76 – $97: 92 hospitals$76$97 – $124: 101 hospitals$124 – $159: 52 hospitals$124$159 – $203: 41 hospitals$159median $56price bands are equal on a log scale
Hospitals per price band (739 of 820 — the bands cover the 5th to 95th percentile)
FromToHospitals
$17$2284
$22$2860
$28$3662
$36$4794
$47$5997
$59$7656
$76$9792
$97$124101
$124$15952
$159$20341

By state

The median cash price in each state, against the national median of $56.

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: 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 $41 across 14 hospitalsWA$41Idaho: no hospital in the corpus filed a usable priceIDMontana: 5 hospitals filed a usable price — fewer than 10, so no figureMTNorth Dakota: 8 hospitals filed a usable price — fewer than 10, so no figureNDMinnesota: median $91 across 11 hospitalsMN$91Illinois: median $59 across 34 hospitalsIL$59Wisconsin: median $100 across 11 hospitalsWI$100Michigan: median $38 across 21 hospitalsMI$38New York: median $25 across 34 hospitalsNY$25Massachusetts: median $127 across 19 hospitalsMA$127Oregon: median $50 across 12 hospitalsOR$50Nevada: 3 hospitals filed a usable price — fewer than 10, so no figureNVWyoming: 5 hospitals filed a usable price — fewer than 10, so no figureWYSouth Dakota: median $124 across 28 hospitalsSD$124Iowa: median $63 across 34 hospitalsIA$63Indiana: median $22 across 21 hospitalsIN$22Ohio: median $37 across 44 hospitalsOH$37Pennsylvania: median $39 across 52 hospitalsPA$39New Jersey: median $20 across 35 hospitalsNJ$20Connecticut: 8 hospitals filed a usable price — fewer than 10, so no figureCTRhode Island: 6 hospitals filed a usable price — fewer than 10, so no figureRICalifornia: median $58 across 50 hospitalsCA$58Utah: 4 hospitals filed a usable price — fewer than 10, so no figureUTColorado: median $76 across 13 hospitalsCO$76Nebraska: median $57 across 20 hospitalsNE$57Missouri: median $51 across 14 hospitalsMO$51Kentucky: 8 hospitals filed a usable price — fewer than 10, so no figureKYWest Virginia: median $75 across 10 hospitalsWV$75Virginia: median $91 across 22 hospitalsVA$91Maryland: median $31 across 10 hospitalsMD$31Delaware: no hospital in the corpus filed a usable priceDEArizona: 2 hospitals filed a usable price — fewer than 10, so no figureAZNew Mexico: 1 hospital filed a usable price — fewer than 10, so no figureNMKansas: 9 hospitals filed a usable price — fewer than 10, so no figureKSArkansas: 6 hospitals filed a usable price — fewer than 10, so no figureARTennessee: median $44 across 29 hospitalsTN$44North Carolina: median $49 across 15 hospitalsNC$49South Carolina: median $87 across 24 hospitalsSC$87Oklahoma: median $39 across 23 hospitalsOK$39Louisiana: median $36 across 19 hospitalsLA$36Mississippi: median $36 across 18 hospitalsMS$36Alabama: median $44 across 14 hospitalsAL$44Georgia: median $78 across 27 hospitalsGA$78Hawaii: 5 hospitals filed a usable price — fewer than 10, so no figureHITexas: median $86 across 46 hospitalsTX$86Florida: median $113 across 16 hospitalsFL$113
Cash price by state, most expensive first. National median $56. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
Massachusetts MA19$127+127%$40 – $177
South Dakota SD28$124+122%$60 – $195
Florida FL16$113+101%$42 – $132
Wisconsin WI11$100+78%$67 – $118
Minnesota MN11$91+63%$61 – $164
Virginia VA22$91+62%$23 – $113
South Carolina SC24$87+54%$36 – $121
Texas TX46$86+53%$65 – $102
Georgia GA27$78+40%$78 – $172
Colorado CO13$76+35%$76 – $140
West Virginia WV10$75+34%$54 – $82
Iowa IA34$63+12%$49 – $106
Illinois IL34$59+5%$26 – $142
California CA50$58+4%$40 – $104
Nebraska NE20$57+1%$34 – $162
Missouri MO14$51−10%$19 – $87
Oregon OR12$50−12%$37 – $94
North Carolina NC15$49−13%$41 – $145
Tennessee TN29$44−21%$23 – $105
Alabama AL14$44−21%$18 – $86
Washington WA14$41−27%$27 – $100
Oklahoma OK23$39−31%$32 – $108
Pennsylvania PA52$39−31%$18 – $165
Michigan MI21$38−33%$25 – $38
Ohio OH44$37−34%$32 – $81
Louisiana LA19$36−35%$21 – $71
Mississippi MS18$36−35%$27 – $53
Maryland MD10$31−44%$25 – $34
New York NY34$25−56%$18 – $158
Indiana IN21$22−61%$14 – $51
New Jersey NJ35$20−64%$18 – $21
Kansas KS9not enough hospitals filed a usable price
Connecticut CT8not enough hospitals filed a usable price
Kentucky KY8not enough hospitals filed a usable price
North Dakota ND8not enough hospitals filed a usable price
Arkansas AR6not enough hospitals filed a usable price
Rhode Island RI6not enough hospitals filed a usable price
Hawaii HI5not enough hospitals filed a usable price
Montana MT5not enough hospitals filed a usable price
Wyoming WY5not enough hospitals filed a usable price
New Hampshire NH4not enough hospitals filed a usable price
Utah UT4not enough hospitals filed a usable price
Maine ME3not enough hospitals filed a usable price
Nevada NV3not enough hospitals filed a usable price
Arizona AZ2not enough hospitals filed a usable price
Vermont VT2not enough hospitals filed a usable price
Alaska AK1not 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 $56.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care617$52$23 – $108
Children’s25$91$40 – $108
Critical access175$73$37 – $134
Ownership
For-profit77$55$24 – $126
Government139$65$32 – $111
Non-profit601$54$25 – $114
System affiliation
Part of a system680$58$25 – $114
Independent140$53$30 – $108

Cash price vs list price

Median list price (chargemaster)$109
Median cash price$56
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

572 hospitals filed a usable inpatient cash price for this code. The median is $65 and the average of the middle 60% is $71; most fall between $34 and $121.

Cash price percentiles, inpatient, across 572 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
$23$37$65$111$169

The most expensive tenth of hospitals charges at least 7.5× what the cheapest tenth charges ($23 vs $169).

Of the 613 hospitals that filed this code inpatient, 572 gave a usable cash price; 22 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 19 a list price only.

How complete is this

820 of the 3,956 hospitals with a price file in our corpus (21%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 876 hospitals that filed this code at all gave us
Usable cash price — counted820
Cash price carrying a plausibility flag — shown on the compare tool, excluded here35
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 — excluded20
Hospitals that filed this code876

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 July 20, 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 Other Laboratory family.

Hospitals file this code under descriptions such as IA INFECTIOUS AGENT ANTIBODY.

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, “Rapid single-step antibody test for an infection (CPT 86318) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-86318-rapid-single-step-antibody-test-for-an-infection