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Procedure price report · Other diagnostic procedures on lung and bronchus

Breathing response to low oxygen test

CPT 94450the billing code this page is about

Measures how your breathing changes while you breathe a gas mixture with reduced oxygen, including the needed monitoring during the test.

Hospitals typically charge $176 cash for this outpatient procedure — the median across 371 hospitals that filed a usable cash price; the average of the middle 60% is $195. Most fall between $72 and $437 (20th–80th percentile).

Hospitals
371
States
44
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 371 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
$36$83$176$334$599

The most expensive tenth of hospitals charges at least 16× what the cheapest tenth charges ($36 vs $599).

How the prices are spread

$21 – $30: 12 hospitals$21$30 – $43: 31 hospitals$43 – $63: 13 hospitals$43$63 – $91: 27 hospitals$91 – $132: 28 hospitals$91$132 – $191: 87 hospitals$191 – $277: 42 hospitals$191$277 – $402: 30 hospitals$402 – $582: 34 hospitals$402$582 – $844: 34 hospitals$582median $176price bands are equal on a log scale
Hospitals per price band (338 of 371 — the bands cover the 5th to 95th percentile)
FromToHospitals
$21$3012
$30$4331
$43$6313
$63$9127
$91$13228
$132$19187
$191$27742
$277$40230
$402$58234
$582$84434

Against Medicare

Medicare pays (OPPS 2026, national rate)$131
Median cash price$176
Cash as a multiple of Medicare1.34×

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 $176.

Alaska: 1 hospital filed a usable price — fewer than 10, so no figureAKMaine: 2 hospitals filed a usable price — fewer than 10, so no figureMEVermont: 2 hospitals filed a usable price — fewer than 10, so no figureVTNew Hampshire: 3 hospitals filed a usable price — fewer than 10, so no figureNHWashington: 7 hospitals filed a usable price — fewer than 10, so no figureWAIdaho: 2 hospitals filed a usable price — fewer than 10, so no figureIDMontana: 3 hospitals filed a usable price — fewer than 10, so no figureMTNorth Dakota: no hospital in the corpus filed a usable priceNDMinnesota: 7 hospitals filed a usable price — fewer than 10, so no figureMNIllinois: median $43 across 13 hospitalsIL$43Wisconsin: no hospital in the corpus filed a usable priceWIMichigan: median $148 across 17 hospitalsMI$148New York: median $185 across 29 hospitalsNY$185Massachusetts: 1 hospital filed a usable price — fewer than 10, so no figureMAOregon: 3 hospitals filed a usable price — fewer than 10, so no figureORNevada: 3 hospitals filed a usable price — fewer than 10, so no figureNVWyoming: 2 hospitals filed a usable price — fewer than 10, so no figureWYSouth Dakota: no hospital in the corpus filed a usable priceSDIowa: median $43 across 13 hospitalsIA$43Indiana: 1 hospital filed a usable price — fewer than 10, so no figureINOhio: median $468 across 20 hospitalsOH$468Pennsylvania: median $15 across 18 hospitalsPA$15New Jersey: median $149 across 22 hospitalsNJ$149Connecticut: 5 hospitals filed a usable price — fewer than 10, so no figureCTRhode Island: no hospital in the corpus filed a usable priceRICalifornia: median $599 across 42 hospitalsCA$599Utah: no hospital in the corpus filed a usable priceUTColorado: 3 hospitals filed a usable price — fewer than 10, so no figureCONebraska: 3 hospitals filed a usable price — fewer than 10, so no figureNEMissouri: 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: 2 hospitals filed a usable price — fewer than 10, so no figureWVVirginia: 4 hospitals filed a usable price — fewer than 10, so no figureVAMaryland: 1 hospital 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: 4 hospitals filed a usable price — fewer than 10, so no figureNMKansas: 5 hospitals filed a usable price — fewer than 10, so no figureKSArkansas: 2 hospitals filed a usable price — fewer than 10, so no figureARTennessee: median $65 across 14 hospitalsTN$65North Carolina: 9 hospitals filed a usable price — fewer than 10, so no figureNCSouth Carolina: 5 hospitals filed a usable price — fewer than 10, so no figureSCOklahoma: median $36 across 18 hospitalsOK$36Louisiana: 9 hospitals filed a usable price — fewer than 10, so no figureLAMississippi: 5 hospitals filed a usable price — fewer than 10, so no figureMSAlabama: 2 hospitals filed a usable price — fewer than 10, so no figureALGeorgia: 2 hospitals filed a usable price — fewer than 10, so no figureGAHawaii: 7 hospitals filed a usable price — fewer than 10, so no figureHITexas: median $212 across 38 hospitalsTX$212Florida: median $334 across 11 hospitalsFL$334
Cash price by state, most expensive first. National median $176. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
California CA42$599+240%$415 – $844
Ohio OH20$468+166%$94 – $468
Florida FL11$334+90%$114 – $334
Texas TX38$212+20%$169 – $212
New York NY29$185+5%$153 – $185
New Jersey NJ22$149−15%$76 – $173
Michigan MI17$148−16%$81 – $177
Tennessee TN14$65−63%$21 – $80
Iowa IA13$43−75%$43 – $43
Illinois IL13$43−75%$18 – $280
Oklahoma OK18$36−79%$36 – $304
Pennsylvania PA18$15−92%$12 – $193
Louisiana LA9not enough hospitals filed a usable price
North Carolina NC9not enough hospitals filed a usable price
Hawaii HI7not enough hospitals filed a usable price
Minnesota MN7not enough hospitals filed a usable price
Washington WA7not enough hospitals filed a usable price
Kentucky KY6not enough hospitals filed a usable price
Connecticut CT5not enough hospitals filed a usable price
Kansas KS5not enough hospitals filed a usable price
Mississippi MS5not enough hospitals filed a usable price
South Carolina SC5not enough hospitals filed a usable price
New Mexico NM4not enough hospitals filed a usable price
Virginia VA4not enough hospitals filed a usable price
Arizona AZ3not enough hospitals filed a usable price
Colorado CO3not enough hospitals filed a usable price
Montana MT3not enough hospitals filed a usable price
Nebraska NE3not enough hospitals filed a usable price
New Hampshire NH3not enough hospitals filed a usable price
Nevada NV3not enough hospitals filed a usable price
Oregon OR3not enough hospitals filed a usable price
Alabama AL2not enough hospitals filed a usable price
Arkansas AR2not enough hospitals filed a usable price
Georgia GA2not enough hospitals filed a usable price
Idaho ID2not enough hospitals filed a usable price
Maine ME2not enough hospitals filed a usable price
Missouri MO2not enough hospitals filed a usable price
Vermont VT2not enough hospitals filed a usable price
West Virginia WV2not enough hospitals filed a usable price
Wyoming WY2not enough hospitals filed a usable price
Alaska AK1not enough hospitals filed a usable price
Indiana IN1not enough hospitals filed a usable price
Massachusetts MA1not enough hospitals filed a usable price
Maryland MD1not 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 $176.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care326$173$76 – $425
Children’s14fewer than 20 hospitals
Critical access31$144$43 – $323
Ownership
For-profit42$169$76 – $437
Government40$176$58 – $323
Non-profit289$177$65 – $468
System affiliation
Part of a system324$177$72 – $468
Independent47$166$58 – $371

Cash price vs list price

Median list price (chargemaster)$353
Median cash price$176
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

237 hospitals filed a usable inpatient cash price for this code. The median is $212 and the average of the middle 60% is $242; most fall between $80 and $468.

Cash price percentiles, inpatient, across 237 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
$38$98$212$439$599

The most expensive tenth of hospitals charges at least 16× what the cheapest tenth charges ($38 vs $599).

Of the 256 hospitals that filed this code inpatient, 237 gave a usable cash price; 11 carried a plausibility flag, 1 filed a number their own filing marks as not a price, 0 gave an estimate, and 7 a list price only.

How complete is this

371 of the 3,956 hospitals with a price file in our corpus (9%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 383 hospitals that filed this code at all gave us
Usable cash price — counted371
Cash price carrying a plausibility flag — shown on the compare tool, excluded here7
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 — excluded5
Hospitals that filed this code383

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 Other diagnostic procedures on lung and bronchus family.

Hospitals file this code under descriptions such as Breathing Response to Hypoxia|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, “Breathing response to low oxygen test (CPT 94450) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-94450-breathing-response-to-low-oxygen-test