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Procedure price report · Other Laboratory

Ehrlichia antibody blood test

CPT 86666the billing code this page is about

A blood test for antibodies to Ehrlichia bacteria, which are spread by tick bites.

Hospitals typically charge $55 cash for this outpatient procedure — the median across 2,678 hospitals that filed a usable cash price; the average of the middle 60% is $61. Most fall between $23 and $123 (20th–80th percentile).

Hospitals
2,678
States
50
Filings dated
Aug 2022 – 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 2,678 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$28$55$106$189

The most expensive tenth of hospitals charges at least 12× what the cheapest tenth charges ($16 vs $189).

How the prices are spread

$11 – $15: 130 hospitals$11$15 – $21: 197 hospitals$21 – $29: 219 hospitals$21$29 – $40: 279 hospitals$40 – $55: 379 hospitals$40$55 – $75: 349 hospitals$75 – $104: 303 hospitals$75$104 – $144: 246 hospitals$144 – $198: 205 hospitals$144$198 – $274: 108 hospitals$198median $55price bands are equal on a log scale
Hospitals per price band (2,415 of 2,678 — the bands cover the 5th to 95th percentile)
FromToHospitals
$11$15130
$15$21197
$21$29219
$29$40279
$40$55379
$55$75349
$75$104303
$104$144246
$144$198205
$198$274108

By state

The median cash price in each state, against the national median of $55.

Alaska: median $100 across 11 hospitalsAK$100Maine: median $63 across 28 hospitalsME$63Vermont: median $76 across 12 hospitalsVT$76New Hampshire: median $57 across 23 hospitalsNH$57Washington: median $39 across 49 hospitalsWA$39Idaho: median $45 across 13 hospitalsID$45Montana: median $74 across 17 hospitalsMT$74North Dakota: median $54 across 24 hospitalsND$54Minnesota: median $63 across 96 hospitalsMN$63Illinois: median $111 across 115 hospitalsIL$111Wisconsin: median $68 across 104 hospitalsWI$68Michigan: median $20 across 58 hospitalsMI$20New York: median $28 across 106 hospitalsNY$28Massachusetts: median $66 across 51 hospitalsMA$66Oregon: median $35 across 27 hospitalsOR$35Nevada: median $46 across 14 hospitalsNV$46Wyoming: median $89 across 12 hospitalsWY$89South Dakota: median $70 across 13 hospitalsSD$70Iowa: median $59 across 61 hospitalsIA$59Indiana: median $36 across 88 hospitalsIN$36Ohio: median $69 across 109 hospitalsOH$69Pennsylvania: median $58 across 117 hospitalsPA$58New Jersey: median $12 across 55 hospitalsNJ$12Connecticut: median $44 across 17 hospitalsCT$44Rhode Island: median $76 across 10 hospitalsRI$76California: median $30 across 62 hospitalsCA$30Utah: median $54 across 34 hospitalsUT$54Colorado: median $74 across 52 hospitalsCO$74Nebraska: median $87 across 49 hospitalsNE$87Missouri: median $59 across 72 hospitalsMO$59Kentucky: median $68 across 67 hospitalsKY$68West Virginia: median $49 across 32 hospitalsWV$49Virginia: median $69 across 73 hospitalsVA$69Maryland: median $87 across 39 hospitalsMD$87Delaware: 6 hospitals filed a usable price — fewer than 10, so no figureDEArizona: median $47 across 34 hospitalsAZ$47New Mexico: median $48 across 15 hospitalsNM$48Kansas: median $123 across 74 hospitalsKS$123Arkansas: median $22 across 38 hospitalsAR$22Tennessee: median $38 across 78 hospitalsTN$38North Carolina: median $31 across 84 hospitalsNC$31South Carolina: median $136 across 51 hospitalsSC$136Oklahoma: median $68 across 70 hospitalsOK$68Louisiana: median $25 across 35 hospitalsLA$25Mississippi: median $31 across 47 hospitalsMS$31Alabama: median $38 across 36 hospitalsAL$38Georgia: median $49 across 88 hospitalsGA$49Hawaii: 8 hospitals filed a usable price — fewer than 10, so no figureHITexas: median $61 across 184 hospitalsTX$61Florida: median $37 across 120 hospitalsFL$37
Cash price by state, most expensive first. National median $55. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
South Carolina SC51$136+147%$48 – $332
Kansas KS74$123+124%$60 – $204
Illinois IL115$111+102%$44 – $204
Alaska AK11$100+82%$84 – $158
Wyoming WY12$89+62%$56 – $116
Nebraska NE49$87+59%$55 – $192
Maryland MD39$87+59%$59 – $106
Rhode Island RI10$76+38%$38 – $77
Vermont VT12$76+38%$43 – $135
Montana MT17$74+34%$36 – $124
Colorado CO52$74+34%$46 – $121
South Dakota SD13$70+28%$60 – $126
Ohio OH109$69+26%$28 – $157
Virginia VA73$69+25%$18 – $146
Kentucky KY67$68+23%$31 – $128
Oklahoma OK70$68+23%$31 – $129
Wisconsin WI104$68+23%$36 – $108
Massachusetts MA51$66+20%$38 – $125
Maine ME28$63+15%$31 – $103
Minnesota MN96$63+14%$31 – $110
Texas TX184$61+11%$34 – $203
Missouri MO72$59+7%$30 – $113
Iowa IA61$59+7%$49 – $90
Pennsylvania PA117$58+6%$16 – $124
New Hampshire NH23$57+4%$29 – $218
Utah UT34$54−1%$54 – $84
North Dakota ND24$54−2%$18 – $72
West Virginia WV32$49−11%$20 – $92
Georgia GA88$49−11%$35 – $145
New Mexico NM15$48−13%$36 – $110
Arizona AZ34$47−15%$22 – $109
Nevada NV14$46−16%$16 – $172
Idaho ID13$45−18%$38 – $108
Connecticut CT17$44−20%$38 – $75
Washington WA49$39−29%$23 – $91
Tennessee TN78$38−30%$17 – $84
Alabama AL36$38−30%$17 – $121
Florida FL120$37−33%$16 – $55
Indiana IN88$36−34%$18 – $120
Oregon OR27$35−36%$14 – $79
Mississippi MS47$31−44%$9 – $56
North Carolina NC84$31−44%$17 – $93
California CA62$30−46%$18 – $108
New York NY106$28−50%$16 – $50
Louisiana LA35$25−55%$16 – $71
Arkansas AR38$22−61%$17 – $105
Michigan MI58$20−63%$14 – $34
New Jersey NJ55$12−79%$10 – $34
Hawaii HI8not enough hospitals filed a usable price
Delaware DE6not 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 $55.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care1,959$49$21 – $113
Children’s44$55$26 – $114
Critical access669$75$34 – $141
Ownership
For-profit367$68$28 – $220
Government445$60$25 – $125
Non-profit1,860$53$22 – $109
System affiliation
Part of a system2,242$54$22 – $119
Independent436$62$30 – $142

Cash price vs list price

Median list price (chargemaster)$100
Median cash price$55
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

1,813 hospitals filed a usable inpatient cash price for this code. The median is $56 and the average of the middle 60% is $61; most fall between $27 and $113.

Cash price percentiles, inpatient, across 1,813 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
$17$31$56$102$168

The most expensive tenth of hospitals charges at least 9.9× what the cheapest tenth charges ($17 vs $168).

Of the 1,989 hospitals that filed this code inpatient, 1,813 gave a usable cash price; 87 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 89 a list price only.

How complete is this

2,678 of the 3,956 hospitals with a price file in our corpus (68%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 2,906 hospitals that filed this code at all gave us
Usable cash price — counted2,678
Cash price carrying a plausibility flag — shown on the compare tool, excluded here119
A number the filing itself marks as not a price (a placeholder, a ratio) — excluded1
An estimate rather than a filed cash price — excluded1
A list price only, no cash figure — excluded107
Hospitals that filed this code2,906

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 Ehrlichia Ab.

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, “Ehrlichia antibody blood test (CPT 86666) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-86666-ehrlichia-antibody-blood-test