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Procedure price report · Other Laboratory

Complement fixation antibody test, each antigen

CPT 86171the billing code this page is about

Blood test that detects antibodies to an infectious organism using a complement fixation method; billed once for each antigen tested.

Hospitals typically charge $48 cash for this outpatient procedure — the median across 652 hospitals that filed a usable cash price; the average of the middle 60% is $54. Most fall between $16 and $112 (20th–80th percentile).

Hospitals
652
States
49
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 652 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
$11$20$48$103$202

The most expensive tenth of hospitals charges at least 18× what the cheapest tenth charges ($11 vs $202).

How the prices are spread

$10 – $14: 87 hospitals$10$14 – $20: 38 hospitals$20 – $28: 74 hospitals$20$28 – $40: 59 hospitals$40 – $56: 65 hospitals$40$56 – $80: 84 hospitals$80 – $113: 84 hospitals$80$113 – $159: 41 hospitals$159 – $225: 37 hospitals$159$225 – $318: 20 hospitals$225median $48price bands are equal on a log scale
Hospitals per price band (589 of 652 — the bands cover the 5th to 95th percentile)
FromToHospitals
$10$1487
$14$2038
$20$2874
$28$4059
$40$5665
$56$8084
$80$11384
$113$15941
$159$22537
$225$31820

By state

The median cash price in each state, against the national median of $48.

Alaska: 2 hospitals filed a usable price — fewer than 10, so no figureAKMaine: 1 hospital filed a usable price — fewer than 10, so no figureMEVermont: no hospital in the corpus filed a usable priceVTNew Hampshire: 2 hospitals filed a usable price — fewer than 10, so no figureNHWashington: median $29 across 25 hospitalsWA$29Idaho: 9 hospitals filed a usable price — fewer than 10, so no figureIDMontana: 1 hospital filed a usable price — fewer than 10, so no figureMTNorth Dakota: 1 hospital filed a usable price — fewer than 10, so no figureNDMinnesota: 1 hospital filed a usable price — fewer than 10, so no figureMNIllinois: median $56 across 22 hospitalsIL$56Wisconsin: 4 hospitals filed a usable price — fewer than 10, so no figureWIMichigan: median $18 across 14 hospitalsMI$18New York: median $15 across 33 hospitalsNY$15Massachusetts: median $45 across 12 hospitalsMA$45Oregon: median $80 across 11 hospitalsOR$80Nevada: 5 hospitals filed a usable price — fewer than 10, so no figureNVWyoming: 1 hospital filed a usable price — fewer than 10, so no figureWYSouth Dakota: 1 hospital filed a usable price — fewer than 10, so no figureSDIowa: median $21 across 13 hospitalsIA$21Indiana: median $40 across 36 hospitalsIN$40Ohio: median $144 across 32 hospitalsOH$144Pennsylvania: median $24 across 38 hospitalsPA$24New Jersey: median $11 across 27 hospitalsNJ$11Connecticut: 1 hospital filed a usable price — fewer than 10, so no figureCTRhode Island: 1 hospital filed a usable price — fewer than 10, so no figureRICalifornia: median $29 across 87 hospitalsCA$29Utah: 7 hospitals filed a usable price — fewer than 10, so no figureUTColorado: median $57 across 14 hospitalsCO$57Nebraska: 3 hospitals filed a usable price — fewer than 10, so no figureNEMissouri: 9 hospitals filed a usable price — fewer than 10, so no figureMOKentucky: median $220 across 17 hospitalsKY$220West Virginia: 3 hospitals filed a usable price — fewer than 10, so no figureWVVirginia: median $63 across 10 hospitalsVA$63Maryland: 8 hospitals filed a usable price — fewer than 10, so no figureMDDelaware: 1 hospital filed a usable price — fewer than 10, so no figureDEArizona: median $74 across 19 hospitalsAZ$74New Mexico: 3 hospitals filed a usable price — fewer than 10, so no figureNMKansas: 2 hospitals filed a usable price — fewer than 10, so no figureKSArkansas: 1 hospital filed a usable price — fewer than 10, so no figureARTennessee: median $39 across 13 hospitalsTN$39North Carolina: 4 hospitals filed a usable price — fewer than 10, so no figureNCSouth Carolina: 5 hospitals filed a usable price — fewer than 10, so no figureSCOklahoma: median $30 across 16 hospitalsOK$30Louisiana: 2 hospitals filed a usable price — fewer than 10, so no figureLAMississippi: median $39 across 20 hospitalsMS$39Alabama: median $47 across 10 hospitalsAL$47Georgia: median $99 across 18 hospitalsGA$99Hawaii: 4 hospitals filed a usable price — fewer than 10, so no figureHITexas: median $115 across 49 hospitalsTX$115Florida: median $52 across 34 hospitalsFL$52
Cash price by state, most expensive first. National median $48. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
Kentucky KY17$220+358%$61 – $220
Ohio OH32$144+199%$45 – $179
Texas TX49$115+139%$107 – $424
Georgia GA18$99+106%$56 – $99
Oregon OR11$80+67%$46 – $87
Arizona AZ19$74+54%$13 – $104
Virginia VA10$63+30%$24 – $63
Colorado CO14$57+20%$57 – $159
Illinois IL22$56+16%$14 – $107
Florida FL34$52+8%$20 – $124
Alabama AL10$47−2%$10 – $79
Massachusetts MA12$45−5%$23 – $124
Indiana IN36$40−17%$16 – $55
Mississippi MS20$39−19%$10 – $70
Tennessee TN13$39−19%$20 – $115
Oklahoma OK16$30−37%$18 – $58
California CA87$29−39%$16 – $57
Washington WA25$29−40%$14 – $45
Pennsylvania PA38$24−50%$8 – $100
Iowa IA13$21−57%$21 – $21
Michigan MI14$18−62%$14 – $151
New York NY33$15−68%$10 – $77
New Jersey NJ27$11−77%$10 – $11
Idaho ID9not enough hospitals filed a usable price
Missouri MO9not enough hospitals filed a usable price
Maryland MD8not enough hospitals filed a usable price
Utah UT7not enough hospitals filed a usable price
Nevada NV5not enough hospitals filed a usable price
South Carolina SC5not enough hospitals filed a usable price
Hawaii HI4not enough hospitals filed a usable price
North Carolina NC4not enough hospitals filed a usable price
Wisconsin WI4not enough hospitals filed a usable price
Nebraska NE3not enough hospitals filed a usable price
New Mexico NM3not enough hospitals filed a usable price
West Virginia WV3not enough hospitals filed a usable price
Alaska AK2not enough hospitals filed a usable price
Kansas KS2not enough hospitals filed a usable price
Louisiana LA2not enough hospitals filed a usable price
New Hampshire NH2not enough hospitals filed a usable price
Arkansas AR1not enough hospitals filed a usable price
Connecticut CT1not enough hospitals filed a usable price
Delaware DE1not enough hospitals filed a usable price
Maine ME1not enough hospitals filed a usable price
Minnesota MN1not enough hospitals filed a usable price
Montana MT1not enough hospitals filed a usable price
North Dakota ND1not enough hospitals filed a usable price
Rhode Island RI1not enough hospitals filed a usable price
South Dakota SD1not enough hospitals filed a usable price
Wyoming WY1not 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 $48.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care544$47$14 – $110
Children’s10fewer than 20 hospitals
Critical access94$47$22 – $121
Ownership
For-profit107$94$27 – $275
Government85$44$16 – $99
Non-profit456$45$14 – $107
System affiliation
Part of a system555$50$16 – $115
Independent97$40$16 – $107

Cash price vs list price

Median list price (chargemaster)$80
Median cash price$48
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

431 hospitals filed a usable inpatient cash price for this code. The median is $57 and the average of the middle 60% is $60; most fall between $23 and $107.

Cash price percentiles, inpatient, across 431 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$25$57$103$161

The most expensive tenth of hospitals charges at least 10× what the cheapest tenth charges ($16 vs $161).

Of the 517 hospitals that filed this code inpatient, 431 gave a usable cash price; 58 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 28 a list price only.

How complete is this

652 of the 3,956 hospitals with a price file in our corpus (16%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 748 hospitals that filed this code at all gave us
Usable cash price — counted652
Cash price carrying a plausibility flag — shown on the compare tool, excluded here64
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 — excluded31
Hospitals that filed this code748

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 Other Laboratory family.

Hospitals file this code under descriptions such as COMPLEMENT FIXATION EACH.

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, “Complement fixation antibody test, each antigen (CPT 86171) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-86171-complement-fixation-antibody-test-each-antigen