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Procedure price report · Laboratory - Chemistry and Hematology

Blood test for antithrombin activity

CPT 85300the billing code this page is about

A blood test that measures how well antithrombin, a natural blood thinner protein, is working. Billed once per test.

Hospitals typically charge $83 cash for this outpatient procedure — the median across 3,178 hospitals that filed a usable cash price; the average of the middle 60% is $92. Most fall between $31 and $184 (20th–80th percentile).

Hospitals
3,178
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 3,178 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$38$83$160$278

The most expensive tenth of hospitals charges at least 15× what the cheapest tenth charges ($19 vs $278).

How the prices are spread

$13 – $18: 151 hospitals$13$18 – $26: 214 hospitals$26 – $37: 247 hospitals$26$37 – $52: 300 hospitals$52 – $73: 382 hospitals$52$73 – $103: 386 hospitals$103 – $145: 405 hospitals$103$145 – $205: 402 hospitals$205 – $289: 255 hospitals$205$289 – $407: 131 hospitals$289median $83price bands are equal on a log scale
Hospitals per price band (2,873 of 3,178 — the bands cover the 5th to 95th percentile)
FromToHospitals
$13$18151
$18$26214
$26$37247
$37$52300
$52$73382
$73$103386
$103$145405
$145$205402
$205$289255
$289$407131

By state

The median cash price in each state, against the national median of $83.

Alaska: median $110 across 18 hospitalsAK$110Maine: median $93 across 28 hospitalsME$93Vermont: median $96 across 14 hospitalsVT$96New Hampshire: median $81 across 25 hospitalsNH$81Washington: median $104 across 73 hospitalsWA$104Idaho: median $66 across 22 hospitalsID$66Montana: median $86 across 27 hospitalsMT$86North Dakota: median $77 across 31 hospitalsND$77Minnesota: median $94 across 102 hospitalsMN$94Illinois: median $132 across 137 hospitalsIL$132Wisconsin: median $129 across 103 hospitalsWI$129Michigan: median $41 across 93 hospitalsMI$41New York: median $51 across 105 hospitalsNY$51Massachusetts: median $85 across 53 hospitalsMA$85Oregon: median $56 across 46 hospitalsOR$56Nevada: median $84 across 18 hospitalsNV$84Wyoming: median $71 across 15 hospitalsWY$71South Dakota: median $155 across 27 hospitalsSD$155Iowa: median $92 across 83 hospitalsIA$92Indiana: median $69 across 93 hospitalsIN$69Ohio: median $62 across 137 hospitalsOH$62Pennsylvania: median $60 across 115 hospitalsPA$60New Jersey: median $14 across 57 hospitalsNJ$14Connecticut: median $59 across 21 hospitalsCT$59Rhode Island: median $95 across 10 hospitalsRI$95California: median $55 across 143 hospitalsCA$55Utah: median $288 across 41 hospitalsUT$288Colorado: median $78 across 67 hospitalsCO$78Nebraska: median $131 across 71 hospitalsNE$131Missouri: median $75 across 74 hospitalsMO$75Kentucky: median $115 across 66 hospitalsKY$115West Virginia: median $69 across 41 hospitalsWV$69Virginia: median $122 across 72 hospitalsVA$122Maryland: median $52 across 41 hospitalsMD$52Delaware: 7 hospitals filed a usable price — fewer than 10, so no figureDEArizona: median $122 across 38 hospitalsAZ$122New Mexico: median $176 across 23 hospitalsNM$176Kansas: median $86 across 83 hospitalsKS$86Arkansas: median $63 across 37 hospitalsAR$63Tennessee: median $48 across 78 hospitalsTN$48North Carolina: median $93 across 84 hospitalsNC$93South Carolina: median $205 across 52 hospitalsSC$205Oklahoma: median $108 across 66 hospitalsOK$108Louisiana: median $48 across 49 hospitalsLA$48Mississippi: median $45 across 53 hospitalsMS$45Alabama: median $71 across 43 hospitalsAL$71Georgia: median $132 across 101 hospitalsGA$132Hawaii: median $76 across 15 hospitalsHI$76Texas: median $92 across 238 hospitalsTX$92Florida: median $29 across 142 hospitalsFL$29
Cash price by state, most expensive first. National median $83. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
Utah UT41$288+247%$125 – $338
South Carolina SC52$205+147%$78 – $322
New Mexico NM23$176+113%$67 – $210
South Dakota SD27$155+87%$83 – $290
Illinois IL137$132+59%$65 – $250
Georgia GA101$132+59%$42 – $173
Nebraska NE71$131+58%$62 – $190
Wisconsin WI103$129+56%$65 – $169
Arizona AZ38$122+47%$34 – $209
Virginia VA72$122+47%$62 – $252
Kentucky KY66$115+38%$36 – $193
Alaska AK18$110+32%$30 – $271
Oklahoma OK66$108+30%$50 – $161
Washington WA73$104+26%$50 – $159
Vermont VT14$96+16%$54 – $180
Rhode Island RI10$95+14%$36 – $119
Minnesota MN102$94+14%$52 – $166
Maine ME28$93+12%$46 – $157
North Carolina NC84$93+11%$23 – $213
Texas TX238$92+11%$54 – $337
Iowa IA83$92+11%$33 – $142
Montana MT27$86+4%$33 – $141
Kansas KS83$86+3%$56 – $172
Massachusetts MA53$85+2%$45 – $188
Nevada NV18$84+1%$13 – $181
New Hampshire NH25$81−3%$52 – $189
Colorado CO67$78−7%$36 – $221
North Dakota ND31$77−8%$22 – $93
Hawaii HI15$76−9%$59 – $158
Missouri MO74$75−10%$50 – $176
Alabama AL43$71−14%$19 – $172
Wyoming WY15$71−14%$40 – $127
Indiana IN93$69−17%$31 – $139
West Virginia WV41$69−17%$45 – $162
Idaho ID22$66−20%$29 – $109
Arkansas AR37$63−24%$13 – $164
Ohio OH137$62−25%$30 – $167
Pennsylvania PA115$60−28%$14 – $221
Connecticut CT21$59−29%$41 – $99
Oregon OR46$56−33%$36 – $140
California CA143$55−34%$12 – $118
Maryland MD41$52−38%$40 – $62
New York NY105$51−39%$14 – $199
Louisiana LA49$48−42%$21 – $140
Tennessee TN78$48−43%$21 – $153
Mississippi MS53$45−46%$31 – $90
Michigan MI93$41−51%$23 – $77
Florida FL142$29−65%$15 – $101
New Jersey NJ57$14−84%$13 – $58
Delaware DE7not 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 $83.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care2,231$78$26 – $187
Children’s62$76$44 – $223
Critical access875$96$44 – $178
Ownership
For-profit436$118$37 – $355
Government579$88$36 – $183
Non-profit2,153$79$29 – $167
System affiliation
Part of a system2,590$83$30 – $187
Independent588$80$37 – $175

Cash price vs list price

Median list price (chargemaster)$137
Median cash price$83
Cash as a share of list, median hospital65%

At the typical hospital, asking for the cash price cuts the list price by about 35%. 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

2,153 hospitals filed a usable inpatient cash price for this code. The median is $83 and the average of the middle 60% is $90; most fall between $33 and $174.

Cash price percentiles, inpatient, across 2,153 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
$21$39$83$157$254

The most expensive tenth of hospitals charges at least 12× what the cheapest tenth charges ($21 vs $254).

Of the 2,373 hospitals that filed this code inpatient, 2,153 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 106 a list price only.

How complete is this

3,178 of the 3,956 hospitals with a price file in our corpus (80%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 3,462 hospitals that filed this code at all gave us
Usable cash price — counted3,178
Cash price carrying a plausibility flag — shown on the compare tool, excluded here159
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 — excluded123
Hospitals that filed this code3,462

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 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 Laboratory - Chemistry and Hematology family.

Hospitals file this code under descriptions such as HC Anti Thrombin III(At3).

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 antithrombin activity (CPT 85300) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-85300-blood-test-for-antithrombin-activity