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Procedure price report · Laboratory - Chemistry and Hematology

Oxygen uptake and exhaled gas test at rest

CPT 94690the billing code this page is about

Measurement of resting oxygen use and energy expenditure by analyzing exhaled air using an indirect method, done without exercise.

Hospitals typically charge $160 cash for this outpatient procedure — the median across 989 hospitals that filed a usable cash price; the average of the middle 60% is $180. Most fall between $66 and $421 (20th–80th percentile).

Hospitals
989
States
50
Filings dated
Nov 2024 – 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 989 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
$45$76$160$344$630

The most expensive tenth of hospitals charges at least 14× what the cheapest tenth charges ($45 vs $630).

How the prices are spread

$27 – $39: 25 hospitals$27$39 – $56: 70 hospitals$56 – $80: 119 hospitals$56$80 – $115: 103 hospitals$115 – $165: 156 hospitals$115$165 – $237: 137 hospitals$237 – $340: 81 hospitals$237$340 – $489: 103 hospitals$489 – $702: 63 hospitals$489$702 – $1,009: 37 hospitals$702median $160price bands are equal on a log scale
Hospitals per price band (894 of 989 — the bands cover the 5th to 95th percentile)
FromToHospitals
$27$3925
$39$5670
$56$80119
$80$115103
$115$165156
$165$237137
$237$34081
$340$489103
$489$70263
$702$1,00937

Against Medicare

Medicare pays (OPPS 2026, national rate)$60
Median cash price$160
Cash as a multiple of Medicare2.6×

The Medicare figure is the national unadjusted OPPS rate for this code — what Medicare itself pays a hospital before local wage adjustment. It is a benchmark, not a price anyone is charged.

By state

The median cash price in each state, against the national median of $160.

Alaska: 4 hospitals filed a usable price — fewer than 10, so no figureAKMaine: 5 hospitals filed a usable price — fewer than 10, so no figureMEVermont: 1 hospital filed a usable price — fewer than 10, so no figureVTNew Hampshire: 2 hospitals filed a usable price — fewer than 10, so no figureNHWashington: median $144 across 30 hospitalsWA$144Idaho: 7 hospitals filed a usable price — fewer than 10, so no figureIDMontana: 2 hospitals filed a usable price — fewer than 10, so no figureMTNorth Dakota: 5 hospitals filed a usable price — fewer than 10, so no figureNDMinnesota: median $161 across 21 hospitalsMN$161Illinois: median $161 across 39 hospitalsIL$161Wisconsin: median $138 across 31 hospitalsWI$138Michigan: median $119 across 25 hospitalsMI$119New York: median $70 across 33 hospitalsNY$70Massachusetts: median $212 across 15 hospitalsMA$212Oregon: median $140 across 19 hospitalsOR$140Nevada: 5 hospitals filed a usable price — fewer than 10, so no figureNVWyoming: 5 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 $99 across 23 hospitalsIA$99Indiana: median $168 across 26 hospitalsIN$168Ohio: median $389 across 53 hospitalsOH$389Pennsylvania: median $80 across 26 hospitalsPA$80New Jersey: median $66 across 23 hospitalsNJ$66Connecticut: 7 hospitals filed a usable price — fewer than 10, so no figureCTRhode Island: 2 hospitals filed a usable price — fewer than 10, so no figureRICalifornia: median $160 across 76 hospitalsCA$160Utah: 6 hospitals filed a usable price — fewer than 10, so no figureUTColorado: median $184 across 31 hospitalsCO$184Nebraska: median $199 across 16 hospitalsNE$199Missouri: median $203 across 14 hospitalsMO$203Kentucky: median $94 across 15 hospitalsKY$94West Virginia: 5 hospitals filed a usable price — fewer than 10, so no figureWVVirginia: median $111 across 22 hospitalsVA$111Maryland: median $294 across 18 hospitalsMD$294Delaware: 2 hospitals filed a usable price — fewer than 10, so no figureDEArizona: median $259 across 19 hospitalsAZ$259New Mexico: 4 hospitals filed a usable price — fewer than 10, so no figureNMKansas: 8 hospitals filed a usable price — fewer than 10, so no figureKSArkansas: 6 hospitals filed a usable price — fewer than 10, so no figureARTennessee: median $41 across 17 hospitalsTN$41North Carolina: median $166 across 37 hospitalsNC$166South Carolina: median $276 across 19 hospitalsSC$276Oklahoma: median $50 across 22 hospitalsOK$50Louisiana: median $95 across 17 hospitalsLA$95Mississippi: median $40 across 16 hospitalsMS$40Alabama: 8 hospitals filed a usable price — fewer than 10, so no figureALGeorgia: median $276 across 40 hospitalsGA$276Hawaii: 5 hospitals filed a usable price — fewer than 10, so no figureHITexas: median $299 across 87 hospitalsTX$299Florida: median $197 across 64 hospitalsFL$197
Cash price by state, most expensive first. National median $160. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
Ohio OH53$389+144%$83 – $472
Texas TX87$299+87%$90 – $470
Maryland MD18$294+84%$180 – $861
South Carolina SC19$276+73%$120 – $276
Georgia GA40$276+73%$199 – $521
Arizona AZ19$259+62%$79 – $1,674
Massachusetts MA15$212+33%$129 – $876
Missouri MO14$203+27%$45 – $396
Nebraska NE16$199+25%$89 – $418
Florida FL64$197+24%$60 – $610
Colorado CO31$184+15%$57 – $645
Indiana IN26$168+5%$62 – $305
North Carolina NC37$166+4%$119 – $203
Illinois IL39$161+1%$82 – $382
Minnesota MN21$161+1%$117 – $732
California CA76$1600%$116 – $448
Washington WA30$144−10%$78 – $218
Oregon OR19$140−12%$56 – $377
Wisconsin WI31$138−14%$50 – $524
Michigan MI25$119−25%$47 – $731
Virginia VA22$111−30%$52 – $208
Iowa IA23$99−38%$10 – $381
Louisiana LA17$95−41%$61 – $121
Kentucky KY15$94−41%$94 – $208
Pennsylvania PA26$80−50%$60 – $487
New York NY33$70−56%$57 – $138
New Jersey NJ23$66−59%$50 – $101
Oklahoma OK22$50−68%$48 – $91
Tennessee TN17$41−74%$41 – $132
Mississippi MS16$40−75%$21 – $56
Alabama AL8not enough hospitals filed a usable price
Kansas KS8not enough hospitals filed a usable price
Connecticut CT7not enough hospitals filed a usable price
Idaho ID7not enough hospitals filed a usable price
Arkansas AR6not enough hospitals filed a usable price
South Dakota SD6not enough hospitals filed a usable price
Utah UT6not enough hospitals filed a usable price
Hawaii HI5not enough hospitals filed a usable price
Maine ME5not enough hospitals filed a usable price
North Dakota ND5not enough hospitals filed a usable price
Nevada NV5not enough hospitals filed a usable price
West Virginia WV5not enough hospitals filed a usable price
Wyoming WY5not enough hospitals filed a usable price
Alaska AK4not enough hospitals filed a usable price
New Mexico NM4not enough hospitals filed a usable price
Delaware DE2not enough hospitals filed a usable price
Montana MT2not enough hospitals filed a usable price
New Hampshire NH2not enough hospitals filed a usable price
Rhode Island RI2not enough hospitals filed a usable price
Vermont VT1not 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 $160.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care827$160$66 – $421
Children’s39$325$103 – $806
Critical access118$144$57 – $381
Ownership
For-profit108$241$84 – $642
Government128$140$56 – $318
Non-profit748$154$65 – $418
System affiliation
Part of a system878$161$68 – $430
Independent111$116$51 – $298

Cash price vs list price

Median list price (chargemaster)$285
Median cash price$160
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

738 hospitals filed a usable inpatient cash price for this code. The median is $184 and the average of the middle 60% is $213; most fall between $75 and $470.

Cash price percentiles, inpatient, across 738 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
$49$90$184$409$732

The most expensive tenth of hospitals charges at least 15× what the cheapest tenth charges ($49 vs $732).

Of the 792 hospitals that filed this code inpatient, 738 gave a usable cash price; 29 carried a plausibility flag, 1 filed a number their own filing marks as not a price, 0 gave an estimate, and 24 a list price only.

How complete is this

989 of the 3,956 hospitals with a price file in our corpus (25%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 1,076 hospitals that filed this code at all gave us
Usable cash price — counted989
Cash price carrying a plausibility flag — shown on the compare tool, excluded here54
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 — excluded33
Hospitals that filed this code1,076

Sections not shown for this setting

  • 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 Laboratory - Chemistry and Hematology family.

Hospitals file this code under descriptions such as O2 Uptake Exp Gas Analysis Rest Indirect Spx|PROFESSIONAL COMPONENT.

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, “Oxygen uptake and exhaled gas test at rest (CPT 94690) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-94690-oxygen-uptake-and-exhaled-gas-test-at-rest