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Procedure price report · Other Laboratory

Blood test for Chlamydia antibodies

CPT 86631the billing code this page is about

A blood test that looks for antibodies to Chlamydia, including the species that causes respiratory infection.

Hospitals typically charge $41 cash for this outpatient procedure — the median across 2,560 hospitals that filed a usable cash price; the average of the middle 60% is $44. Most fall between $14 and $90 (20th–80th percentile).

Hospitals
2,560
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 2,560 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$18$41$74$140

The most expensive tenth of hospitals charges at least 13× what the cheapest tenth charges ($11 vs $140).

How the prices are spread

$8 – $10: 118 hospitals$8$10 – $15: 279 hospitals$15 – $20: 180 hospitals$15$20 – $28: 236 hospitals$28 – $39: 301 hospitals$28$39 – $55: 354 hospitals$55 – $77: 354 hospitals$55$77 – $107: 211 hospitals$107 – $149: 170 hospitals$107$149 – $208: 105 hospitals$149median $41price bands are equal on a log scale
Hospitals per price band (2,308 of 2,560 — the bands cover the 5th to 95th percentile)
FromToHospitals
$8$10118
$10$15279
$15$20180
$20$28236
$28$39301
$39$55354
$55$77354
$77$107211
$107$149170
$149$208105

By state

The median cash price in each state, against the national median of $41.

Alaska: median $33 across 12 hospitalsAK$33Maine: median $30 across 21 hospitalsME$30Vermont: 8 hospitals filed a usable price — fewer than 10, so no figureVTNew Hampshire: median $50 across 20 hospitalsNH$50Washington: median $48 across 53 hospitalsWA$48Idaho: median $21 across 18 hospitalsID$21Montana: median $55 across 15 hospitalsMT$55North Dakota: median $69 across 17 hospitalsND$69Minnesota: median $49 across 73 hospitalsMN$49Illinois: median $60 across 110 hospitalsIL$60Wisconsin: median $48 across 89 hospitalsWI$48Michigan: median $13 across 65 hospitalsMI$13New York: median $28 across 95 hospitalsNY$28Massachusetts: median $67 across 46 hospitalsMA$67Oregon: median $23 across 39 hospitalsOR$23Nevada: median $58 across 16 hospitalsNV$58Wyoming: median $42 across 12 hospitalsWY$42South Dakota: median $46 across 10 hospitalsSD$46Iowa: median $49 across 41 hospitalsIA$49Indiana: median $34 across 81 hospitalsIN$34Ohio: median $55 across 123 hospitalsOH$55Pennsylvania: median $38 across 110 hospitalsPA$38New Jersey: median $14 across 55 hospitalsNJ$14Connecticut: median $51 across 16 hospitalsCT$51Rhode Island: median $79 across 10 hospitalsRI$79California: median $10 across 110 hospitalsCA$10Utah: median $34 across 36 hospitalsUT$34Colorado: median $46 across 49 hospitalsCO$46Nebraska: median $53 across 38 hospitalsNE$53Missouri: median $45 across 64 hospitalsMO$45Kentucky: median $45 across 60 hospitalsKY$45West Virginia: median $15 across 27 hospitalsWV$15Virginia: median $63 across 67 hospitalsVA$63Maryland: median $50 across 38 hospitalsMD$50Delaware: 6 hospitals filed a usable price — fewer than 10, so no figureDEArizona: median $45 across 39 hospitalsAZ$45New Mexico: median $71 across 15 hospitalsNM$71Kansas: median $74 across 44 hospitalsKS$74Arkansas: median $38 across 33 hospitalsAR$38Tennessee: median $23 across 65 hospitalsTN$23North Carolina: median $25 across 74 hospitalsNC$25South Carolina: median $69 across 46 hospitalsSC$69Oklahoma: median $50 across 55 hospitalsOK$50Louisiana: median $28 across 41 hospitalsLA$28Mississippi: median $27 across 38 hospitalsMS$27Alabama: median $61 across 38 hospitalsAL$61Georgia: median $44 across 87 hospitalsGA$44Hawaii: median $39 across 11 hospitalsHI$39Texas: median $36 across 188 hospitalsTX$36Florida: median $15 across 136 hospitalsFL$15
Cash price by state, most expensive first. National median $41. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
Rhode Island RI10$79+91%$27 – $95
Kansas KS44$74+78%$36 – $203
New Mexico NM15$71+73%$23 – $87
South Carolina SC46$69+67%$32 – $126
North Dakota ND17$69+67%$53 – $96
Massachusetts MA46$67+62%$29 – $139
Virginia VA67$63+53%$19 – $89
Alabama AL38$61+48%$31 – $182
Illinois IL110$60+45%$16 – $125
Nevada NV16$58+41%$35 – $163
Montana MT15$55+33%$14 – $128
Ohio OH123$55+33%$28 – $107
Nebraska NE38$53+28%$22 – $96
Connecticut CT16$51+22%$38 – $63
Oklahoma OK55$50+22%$22 – $63
New Hampshire NH20$50+21%$27 – $207
Maryland MD38$50+21%$36 – $63
Minnesota MN73$49+18%$21 – $96
Iowa IA41$49+18%$26 – $55
Washington WA53$48+17%$25 – $70
Wisconsin WI89$48+16%$24 – $66
Colorado CO49$46+12%$21 – $147
South Dakota SD10$46+12%$17 – $54
Arizona AZ39$45+9%$14 – $147
Missouri MO64$45+8%$29 – $109
Kentucky KY60$45+8%$30 – $118
Georgia GA87$44+8%$41 – $100
Wyoming WY12$42+3%$26 – $71
Hawaii HI11$39−7%$29 – $74
Pennsylvania PA110$38−7%$14 – $129
Arkansas AR33$38−9%$14 – $68
Texas TX188$36−13%$13 – $129
Indiana IN81$34−17%$15 – $60
Utah UT36$34−17%$29 – $69
Alaska AK12$33−20%$25 – $89
Maine ME21$30−27%$12 – $93
New York NY95$28−32%$12 – $81
Louisiana LA41$28−33%$16 – $57
Mississippi MS38$27−35%$13 – $47
North Carolina NC74$25−41%$11 – $70
Oregon OR39$23−43%$14 – $65
Tennessee TN65$23−45%$17 – $70
Idaho ID18$21−48%$11 – $192
Florida FL136$15−63%$6 – $57
West Virginia WV27$15−63%$10 – $65
New Jersey NJ55$14−67%$12 – $26
Michigan MI65$13−69%$6 – $50
California CA110$10−75%$7 – $34
Vermont VT8not 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 $41.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care1,973$37$13 – $82
Children’s41$45$16 – $92
Critical access536$54$25 – $105
Ownership
For-profit389$49$14 – $182
Government390$42$16 – $94
Non-profit1,771$40$14 – $78
System affiliation
Part of a system2,151$41$14 – $87
Independent409$42$16 – $105

Cash price vs list price

Median list price (chargemaster)$70
Median cash price$41
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

1,783 hospitals filed a usable inpatient cash price for this code. The median is $42 and the average of the middle 60% is $44; most fall between $16 and $82.

Cash price percentiles, inpatient, across 1,783 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$21$42$71$127

The most expensive tenth of hospitals charges at least 11× what the cheapest tenth charges ($11 vs $127).

Of the 1,984 hospitals that filed this code inpatient, 1,783 gave a usable cash price; 114 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 87 a list price only.

How complete is this

2,560 of the 3,956 hospitals with a price file in our corpus (65%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 2,804 hospitals that filed this code at all gave us
Usable cash price — counted2,560
Cash price carrying a plausibility flag — shown on the compare tool, excluded here144
A number the filing itself marks as not a price (a placeholder, a ratio) — excluded0
An estimate rather than a filed cash price — excluded0
A list price only, no cash figure — excluded100
Hospitals that filed this code2,804

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 Chlam Ab Psittaci Igg (Chlp).

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 Chlamydia antibodies (CPT 86631) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-86631-blood-test-for-chlamydia-antibodies