HRHospitalRates.comCompare prices

Procedure price report · Other Laboratory

Carbamazepine blood level, free (unbound) portion

CPT 80157the billing code this page is about

A blood test that measures only the unbound, active portion of the seizure medication carbamazepine in the bloodstream.

Hospitals typically charge $56 cash for this outpatient procedure — the median across 1,575 hospitals that filed a usable cash price; the average of the middle 60% is $59. Most fall between $25 and $113 (20th–80th percentile).

Hospitals
1,575
States
50
Filings dated
Dec 2023 – 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 1,575 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$29$56$101$167

The most expensive tenth of hospitals charges at least 10× what the cheapest tenth charges ($16 vs $167).

How the prices are spread

$13 – $18: 115 hospitals$13$18 – $24: 106 hospitals$24 – $31: 164 hospitals$24$31 – $42: 183 hospitals$42 – $56: 164 hospitals$42$56 – $75: 206 hospitals$75 – $100: 169 hospitals$75$100 – $133: 173 hospitals$133 – $177: 99 hospitals$133$177 – $237: 59 hospitals$177median $56price bands are equal on a log scale
Hospitals per price band (1,438 of 1,575 — the bands cover the 5th to 95th percentile)
FromToHospitals
$13$18115
$18$24106
$24$31164
$31$42183
$42$56164
$56$75206
$75$100169
$100$133173
$133$17799
$177$23759

By state

The median cash price in each state, against the national median of $56.

Alaska: 3 hospitals filed a usable price — fewer than 10, so no figureAKMaine: 1 hospital filed a usable price — fewer than 10, so no figureMEVermont: 6 hospitals filed a usable price — fewer than 10, so no figureVTNew Hampshire: 4 hospitals filed a usable price — fewer than 10, so no figureNHWashington: median $62 across 32 hospitalsWA$62Idaho: 6 hospitals filed a usable price — fewer than 10, so no figureIDMontana: 7 hospitals filed a usable price — fewer than 10, so no figureMTNorth Dakota: median $38 across 16 hospitalsND$38Minnesota: median $66 across 63 hospitalsMN$66Illinois: median $78 across 73 hospitalsIL$78Wisconsin: median $81 across 71 hospitalsWI$81Michigan: median $27 across 52 hospitalsMI$27New York: median $26 across 72 hospitalsNY$26Massachusetts: median $62 across 24 hospitalsMA$62Oregon: median $50 across 15 hospitalsOR$50Nevada: 9 hospitals filed a usable price — fewer than 10, so no figureNVWyoming: 8 hospitals filed a usable price — fewer than 10, so no figureWYSouth Dakota: 6 hospitals filed a usable price — fewer than 10, so no figureSDIowa: median $66 across 24 hospitalsIA$66Indiana: median $34 across 43 hospitalsIN$34Ohio: median $83 across 103 hospitalsOH$83Pennsylvania: median $55 across 83 hospitalsPA$55New Jersey: median $15 across 42 hospitalsNJ$15Connecticut: median $47 across 14 hospitalsCT$47Rhode Island: 8 hospitals filed a usable price — fewer than 10, so no figureRICalifornia: median $38 across 45 hospitalsCA$38Utah: 3 hospitals filed a usable price — fewer than 10, so no figureUTColorado: median $91 across 32 hospitalsCO$91Nebraska: median $97 across 33 hospitalsNE$97Missouri: median $42 across 32 hospitalsMO$42Kentucky: median $79 across 31 hospitalsKY$79West Virginia: median $73 across 22 hospitalsWV$73Virginia: median $57 across 46 hospitalsVA$57Maryland: median $40 across 28 hospitalsMD$40Delaware: 6 hospitals filed a usable price — fewer than 10, so no figureDEArizona: median $42 across 14 hospitalsAZ$42New Mexico: median $79 across 17 hospitalsNM$79Kansas: median $108 across 15 hospitalsKS$108Arkansas: median $64 across 18 hospitalsAR$64Tennessee: median $23 across 42 hospitalsTN$23North Carolina: median $30 across 40 hospitalsNC$30South Carolina: median $58 across 26 hospitalsSC$58Oklahoma: median $31 across 28 hospitalsOK$31Louisiana: median $51 across 15 hospitalsLA$51Mississippi: median $41 across 29 hospitalsMS$41Alabama: 6 hospitals filed a usable price — fewer than 10, so no figureALGeorgia: median $101 across 51 hospitalsGA$101Hawaii: 8 hospitals filed a usable price — fewer than 10, so no figureHITexas: median $49 across 138 hospitalsTX$49Florida: median $54 across 65 hospitalsFL$54
Cash price by state, most expensive first. National median $56. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
Kansas KS15$108+95%$74 – $149
Georgia GA51$101+82%$50 – $132
Nebraska NE33$97+74%$55 – $140
Colorado CO32$91+64%$30 – $275
Ohio OH103$83+49%$38 – $178
Wisconsin WI71$81+46%$50 – $134
Kentucky KY31$79+42%$39 – $167
New Mexico NM17$79+42%$46 – $91
Illinois IL73$78+41%$24 – $136
West Virginia WV22$73+31%$72 – $73
Iowa IA24$66+20%$40 – $78
Minnesota MN63$66+19%$26 – $110
Arkansas AR18$64+16%$21 – $170
Washington WA32$62+11%$51 – $75
Massachusetts MA24$62+11%$33 – $110
South Carolina SC26$58+4%$58 – $61
Virginia VA46$57+3%$28 – $109
Pennsylvania PA83$55−2%$15 – $202
Florida FL65$54−3%$28 – $203
Louisiana LA15$51−9%$25 – $59
Oregon OR15$50−10%$32 – $62
Texas TX138$49−12%$27 – $109
Connecticut CT14$47−15%$31 – $84
Missouri MO32$42−25%$35 – $97
Arizona AZ14$42−25%$15 – $100
Mississippi MS29$41−26%$19 – $51
Maryland MD28$40−29%$31 – $49
California CA45$38−31%$38 – $118
North Dakota ND16$38−32%$23 – $73
Indiana IN43$34−39%$22 – $126
Oklahoma OK28$31−44%$24 – $48
North Carolina NC40$30−46%$30 – $99
Michigan MI52$27−52%$14 – $48
New York NY72$26−53%$16 – $64
Tennessee TN42$23−58%$18 – $32
New Jersey NJ42$15−74%$13 – $45
Nevada NV9not enough hospitals filed a usable price
Hawaii HI8not enough hospitals filed a usable price
Rhode Island RI8not enough hospitals filed a usable price
Wyoming WY8not enough hospitals filed a usable price
Montana MT7not enough hospitals filed a usable price
Alabama AL6not enough hospitals filed a usable price
Delaware DE6not enough hospitals filed a usable price
Idaho ID6not enough hospitals filed a usable price
South Dakota SD6not enough hospitals filed a usable price
Vermont VT6not enough hospitals filed a usable price
New Hampshire NH4not enough hospitals filed a usable price
Alaska AK3not enough hospitals filed a usable price
Utah UT3not enough hospitals filed a usable price
Maine ME1not 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 $56.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care1,236$50$24 – $110
Children’s26$59$20 – $131
Critical access307$67$35 – $116
Ownership
For-profit192$67$24 – $170
Government198$59$30 – $114
Non-profit1,179$54$25 – $110
System affiliation
Part of a system1,378$56$25 – $117
Independent197$53$28 – $100

Cash price vs list price

Median list price (chargemaster)$101
Median cash price$56
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

1,135 hospitals filed a usable inpatient cash price for this code. The median is $58 and the average of the middle 60% is $62; most fall between $27 and $118.

Cash price percentiles, inpatient, across 1,135 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
$20$31$58$103$176

The most expensive tenth of hospitals charges at least 9.0× what the cheapest tenth charges ($20 vs $176).

Of the 1,242 hospitals that filed this code inpatient, 1,135 gave a usable cash price; 57 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 50 a list price only.

How complete is this

1,575 of the 3,956 hospitals with a price file in our corpus (40%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 1,709 hospitals that filed this code at all gave us
Usable cash price — counted1,575
Cash price carrying a plausibility flag — shown on the compare tool, excluded here81
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 — excluded52
Hospitals that filed this code1,709

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 ASSAY CARBAMAZEPINE FREE.

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, “Carbamazepine blood level, free (unbound) portion (CPT 80157) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-80157-carbamazepine-blood-level-free-unbound-portion