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Procedure price report · Laboratory - Chemistry and Hematology

Carbon monoxide in blood measured through the skin

CPT 88740the billing code this page is about

Measurement of carboxyhemoglobin using a skin sensor rather than a blood draw; billed once per day per patient.

Hospitals typically charge $29 cash for this outpatient procedure — the median across 386 hospitals that filed a usable cash price; the average of the middle 60% is $32. Most fall between $10 and $69 (20th–80th percentile).

Hospitals
386
States
40
Filings dated
Aug 2022 – 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 386 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
$7$11$29$62$89

The most expensive tenth of hospitals charges at least 12× what the cheapest tenth charges ($7 vs $89).

How the prices are spread

$5 – $8: 24 hospitals$5$8 – $10: 41 hospitals$10 – $14: 39 hospitals$10$14 – $20: 36 hospitals$20 – $28: 34 hospitals$20$28 – $39: 39 hospitals$39 – $54: 44 hospitals$39$54 – $75: 48 hospitals$75 – $104: 37 hospitals$75$104 – $145: 11 hospitals$104median $29price bands are equal on a log scale
Hospitals per price band (353 of 386 — the bands cover the 5th to 95th percentile)
FromToHospitals
$5$824
$8$1041
$10$1439
$14$2036
$20$2834
$28$3939
$39$5444
$54$7548
$75$10437
$104$14511

By state

The median cash price in each state, against the national median of $29.

Alaska: no hospital in the corpus filed a usable priceAKMaine: no hospital in the corpus filed a usable priceMEVermont: no hospital in the corpus filed a usable priceVTNew Hampshire: no hospital in the corpus filed a usable priceNHWashington: 6 hospitals filed a usable price — fewer than 10, so no figureWAIdaho: 2 hospitals filed a usable price — fewer than 10, so no figureIDMontana: no hospital in the corpus filed a usable priceMTNorth Dakota: no hospital in the corpus filed a usable priceNDMinnesota: 4 hospitals filed a usable price — fewer than 10, so no figureMNIllinois: median $15 across 11 hospitalsIL$15Wisconsin: median $89 across 15 hospitalsWI$89Michigan: median $15 across 32 hospitalsMI$15New York: median $9 across 17 hospitalsNY$9Massachusetts: 5 hospitals filed a usable price — fewer than 10, so no figureMAOregon: 5 hospitals filed a usable price — fewer than 10, so no figureORNevada: 1 hospital 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 $34 across 18 hospitalsIA$34Indiana: median $14 across 15 hospitalsIN$14Ohio: median $41 across 15 hospitalsOH$41Pennsylvania: median $7 across 16 hospitalsPA$7New Jersey: median $10 across 22 hospitalsNJ$10Connecticut: 1 hospital filed a usable price — fewer than 10, so no figureCTRhode Island: no hospital in the corpus filed a usable priceRICalifornia: median $52 across 35 hospitalsCA$52Utah: no hospital in the corpus filed a usable priceUTColorado: 2 hospitals filed a usable price — fewer than 10, so no figureCONebraska: median $148 across 10 hospitalsNE$148Missouri: 2 hospitals filed a usable price — fewer than 10, so no figureMOKentucky: 6 hospitals filed a usable price — fewer than 10, so no figureKYWest Virginia: 7 hospitals filed a usable price — fewer than 10, so no figureWVVirginia: median $24 across 13 hospitalsVA$24Maryland: 2 hospitals filed a usable price — fewer than 10, so no figureMDDelaware: no hospital in the corpus filed a usable priceDEArizona: 3 hospitals filed a usable price — fewer than 10, so no figureAZNew Mexico: 1 hospital filed a usable price — fewer than 10, so no figureNMKansas: 3 hospitals filed a usable price — fewer than 10, so no figureKSArkansas: 3 hospitals filed a usable price — fewer than 10, so no figureARTennessee: median $5 across 15 hospitalsTN$5North Carolina: median $69 across 30 hospitalsNC$69South Carolina: no hospital in the corpus filed a usable priceSCOklahoma: median $6 across 12 hospitalsOK$6Louisiana: median $17 across 17 hospitalsLA$17Mississippi: 4 hospitals filed a usable price — fewer than 10, so no figureMSAlabama: 4 hospitals filed a usable price — fewer than 10, so no figureALGeorgia: 5 hospitals filed a usable price — fewer than 10, so no figureGAHawaii: 2 hospitals filed a usable price — fewer than 10, so no figureHITexas: median $49 across 10 hospitalsTX$49Florida: median $100 across 13 hospitalsFL$100
Cash price by state, most expensive first. National median $29. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
Nebraska NE10$148+406%$101 – $148
Florida FL13$100+243%$27 – $145
Wisconsin WI15$89+205%$82 – $89
North Carolina NC30$69+135%$61 – $78
California CA35$52+76%$52 – $62
Texas TX10$49+67%$20 – $132
Ohio OH15$41+40%$18 – $44
Iowa IA18$34+15%$34 – $38
Virginia VA13$24−18%$5 – $39
Louisiana LA17$17−43%$7 – $122
Illinois IL11$15−49%$7 – $34
Michigan MI32$15−49%$13 – $38
Indiana IN15$14−51%$12 – $20
New Jersey NJ22$10−65%$9 – $10
New York NY17$9−68%$9 – $18
Pennsylvania PA16$7−75%$6 – $12
Oklahoma OK12$6−80%$5 – $11
Tennessee TN15$5−84%$5 – $13
West Virginia WV7not enough hospitals filed a usable price
Kentucky KY6not enough hospitals filed a usable price
Washington WA6not enough hospitals filed a usable price
Georgia GA5not enough hospitals filed a usable price
Massachusetts MA5not enough hospitals filed a usable price
Oregon OR5not enough hospitals filed a usable price
Alabama AL4not enough hospitals filed a usable price
Minnesota MN4not enough hospitals filed a usable price
Mississippi MS4not enough hospitals filed a usable price
Arkansas AR3not enough hospitals filed a usable price
Arizona AZ3not enough hospitals filed a usable price
Kansas KS3not enough hospitals filed a usable price
Colorado CO2not enough hospitals filed a usable price
Hawaii HI2not enough hospitals filed a usable price
Idaho ID2not enough hospitals filed a usable price
Maryland MD2not enough hospitals filed a usable price
Missouri MO2not enough hospitals filed a usable price
Connecticut CT1not enough hospitals filed a usable price
New Mexico NM1not enough hospitals filed a usable price
Nevada NV1not 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 $29.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care306$24$9 – $69
Children’s3fewer than 20 hospitals
Critical access77$34$19 – $89
Ownership
For-profit31$33$12 – $79
Government64$25$10 – $69
Non-profit291$29$10 – $68
System affiliation
Part of a system339$32$10 – $70
Independent47$20$11 – $38

Cash price vs list price

Median list price (chargemaster)$55
Median cash price$29
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

248 hospitals filed a usable inpatient cash price for this code. The median is $38 and the average of the middle 60% is $40; most fall between $14 and $70.

Cash price percentiles, inpatient, across 248 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
$7$16$38$69$89

The most expensive tenth of hospitals charges at least 13× what the cheapest tenth charges ($7 vs $89).

Of the 260 hospitals that filed this code inpatient, 248 gave a usable cash price; 6 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 6 a list price only.

How complete is this

386 of the 3,956 hospitals with a price file in our corpus (10%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 401 hospitals that filed this code at all gave us
Usable cash price — counted386
Cash price carrying a plausibility flag — shown on the compare tool, excluded here9
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 — excluded5
Hospitals that filed this code401

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 Laboratory - Chemistry and Hematology family.

Hospitals file this code under descriptions such as TRANSCUTANEOUS CARBOXYHB.

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, “Carbon monoxide in blood measured through the skin (CPT 88740) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-88740-carbon-monoxide-in-blood-measured-through-the-skin