HRHospitalRates.comCompare prices

Procedure price report · Other Laboratory

Blood test for St. Louis encephalitis antibodies

CPT 86653the billing code this page is about

A blood test that looks for antibodies to the St. Louis encephalitis virus, spread by mosquitoes.

Hospitals typically charge $46 cash for this outpatient procedure — the median across 1,916 hospitals that filed a usable cash price; the average of the middle 60% is $49. Most fall between $21 and $101 (20th–80th percentile).

Hospitals
1,916
States
50
Filings dated
Dec 2023 – 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 1,916 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$24$46$83$155

The most expensive tenth of hospitals charges at least 12× what the cheapest tenth charges ($13 vs $155).

How the prices are spread

$11 – $15: 186 hospitals$11$15 – $21: 108 hospitals$21 – $28: 219 hospitals$21$28 – $39: 224 hospitals$39 – $53: 236 hospitals$39$53 – $72: 272 hospitals$72 – $98: 179 hospitals$72$98 – $133: 124 hospitals$133 – $181: 132 hospitals$133$181 – $247: 49 hospitals$181median $46price bands are equal on a log scale
Hospitals per price band (1,729 of 1,916 — the bands cover the 5th to 95th percentile)
FromToHospitals
$11$15186
$15$21108
$21$28219
$28$39224
$39$53236
$53$72272
$72$98179
$98$133124
$133$181132
$181$24749

By state

The median cash price in each state, against the national median of $46.

Alaska: 7 hospitals filed a usable price — fewer than 10, so no figureAKMaine: median $29 across 20 hospitalsME$29Vermont: median $65 across 10 hospitalsVT$65New Hampshire: median $40 across 14 hospitalsNH$40Washington: median $51 across 23 hospitalsWA$51Idaho: 6 hospitals filed a usable price — fewer than 10, so no figureIDMontana: 6 hospitals filed a usable price — fewer than 10, so no figureMTNorth Dakota: median $25 across 15 hospitalsND$25Minnesota: median $42 across 57 hospitalsMN$42Illinois: median $49 across 82 hospitalsIL$49Wisconsin: median $61 across 74 hospitalsWI$61Michigan: median $17 across 37 hospitalsMI$17New York: median $29 across 63 hospitalsNY$29Massachusetts: median $70 across 37 hospitalsMA$70Oregon: median $26 across 12 hospitalsOR$26Nevada: median $64 across 13 hospitalsNV$64Wyoming: 9 hospitals filed a usable price — fewer than 10, so no figureWYSouth Dakota: 4 hospitals filed a usable price — fewer than 10, so no figureSDIowa: median $49 across 32 hospitalsIA$49Indiana: median $37 across 61 hospitalsIN$37Ohio: median $59 across 86 hospitalsOH$59Pennsylvania: median $74 across 82 hospitalsPA$74New Jersey: median $15 across 45 hospitalsNJ$15Connecticut: 9 hospitals filed a usable price — fewer than 10, so no figureCTRhode Island: 8 hospitals filed a usable price — fewer than 10, so no figureRICalifornia: median $34 across 86 hospitalsCA$34Utah: median $69 across 33 hospitalsUT$69Colorado: median $64 across 37 hospitalsCO$64Nebraska: median $51 across 14 hospitalsNE$51Missouri: median $42 across 50 hospitalsMO$42Kentucky: median $61 across 29 hospitalsKY$61West Virginia: median $8 across 21 hospitalsWV$8Virginia: median $49 across 58 hospitalsVA$49Maryland: median $128 across 32 hospitalsMD$128Delaware: 6 hospitals filed a usable price — fewer than 10, so no figureDEArizona: median $88 across 27 hospitalsAZ$88New Mexico: 9 hospitals filed a usable price — fewer than 10, so no figureNMKansas: median $98 across 27 hospitalsKS$98Arkansas: median $31 across 21 hospitalsAR$31Tennessee: median $27 across 42 hospitalsTN$27North Carolina: median $29 across 72 hospitalsNC$29South Carolina: median $66 across 38 hospitalsSC$66Oklahoma: median $40 across 40 hospitalsOK$40Louisiana: median $30 across 40 hospitalsLA$30Mississippi: median $26 across 39 hospitalsMS$26Alabama: median $57 across 25 hospitalsAL$57Georgia: median $48 across 73 hospitalsGA$48Hawaii: 4 hospitals filed a usable price — fewer than 10, so no figureHITexas: median $56 across 173 hospitalsTX$56Florida: median $27 across 108 hospitalsFL$27
Cash price by state, most expensive first. National median $46. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
Maryland MD32$128+175%$94 – $147
Kansas KS27$98+111%$32 – $238
Arizona AZ27$88+90%$15 – $140
Pennsylvania PA82$74+59%$15 – $147
Massachusetts MA37$70+51%$32 – $126
Utah UT33$69+49%$69 – $81
South Carolina SC38$66+42%$35 – $72
Vermont VT10$65+39%$44 – $112
Nevada NV13$64+39%$13 – $107
Colorado CO37$64+38%$42 – $179
Kentucky KY29$61+32%$39 – $167
Wisconsin WI74$61+31%$27 – $84
Ohio OH86$59+27%$41 – $136
Alabama AL25$57+22%$22 – $171
Texas TX173$56+21%$24 – $250
Nebraska NE14$51+10%$41 – $109
Washington WA23$51+10%$29 – $61
Virginia VA58$49+6%$12 – $102
Iowa IA32$49+5%$47 – $62
Illinois IL82$49+5%$32 – $83
Georgia GA73$48+4%$27 – $74
Missouri MO50$42−9%$29 – $67
Minnesota MN57$42−10%$21 – $116
New Hampshire NH14$40−14%$14 – $98
Oklahoma OK40$40−15%$13 – $62
Indiana IN61$37−21%$22 – $92
California CA86$34−28%$12 – $78
Arkansas AR21$31−34%$19 – $52
Louisiana LA40$30−35%$16 – $41
North Carolina NC72$29−37%$22 – $94
New York NY63$29−37%$14 – $83
Maine ME20$29−38%$9 – $96
Tennessee TN42$27−41%$12 – $60
Florida FL108$27−42%$12 – $78
Oregon OR12$26−44%$20 – $63
Mississippi MS39$26−45%$8 – $52
North Dakota ND15$25−46%$21 – $92
Michigan MI37$17−63%$8 – $59
New Jersey NJ45$15−67%$13 – $101
West Virginia WV21$8−83%$4 – $36
Connecticut CT9not enough hospitals filed a usable price
New Mexico NM9not enough hospitals filed a usable price
Wyoming WY9not enough hospitals filed a usable price
Rhode Island RI8not enough hospitals filed a usable price
Alaska AK7not enough hospitals filed a usable price
Delaware DE6not enough hospitals filed a usable price
Idaho ID6not enough hospitals filed a usable price
Montana MT6not enough hospitals filed a usable price
Hawaii HI4not enough hospitals filed a usable price
South Dakota SD4not 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 $46.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care1,533$45$19 – $101
Children’s39$39$21 – $114
Critical access336$53$26 – $99
Ownership
For-profit286$59$22 – $187
Government251$46$22 – $79
Non-profit1,371$45$21 – $94
System affiliation
Part of a system1,654$46$20 – $102
Independent262$51$25 – $90

Cash price vs list price

Median list price (chargemaster)$80
Median cash price$46
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

1,359 hospitals filed a usable inpatient cash price for this code. The median is $49 and the average of the middle 60% is $51; most fall between $23 and $97.

Cash price percentiles, inpatient, across 1,359 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
$14$27$49$81$144

The most expensive tenth of hospitals charges at least 10× what the cheapest tenth charges ($14 vs $144).

Of the 1,501 hospitals that filed this code inpatient, 1,359 gave a usable cash price; 76 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 66 a list price only.

How complete is this

1,916 of the 3,956 hospitals with a price file in our corpus (48%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 2,097 hospitals that filed this code at all gave us
Usable cash price — counted1,916
Cash price carrying a plausibility flag — shown on the compare tool, excluded here99
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 — excluded81
Hospitals that filed this code2,097

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 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 Other Laboratory family.

Hospitals file this code under descriptions such as HC St. Louis Igg.

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, “Blood test for St. Louis encephalitis antibodies (CPT 86653) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-86653-blood-test-for-st-louis-encephalitis-antibodies