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Procedure price report · Other diagnostic procedures on lung and bronchus

Gas transfer test added to other lung function tests

CPT 94729the billing code this page is about

Measures how well gas passes from the lungs into the blood, including membrane and blood-volume components; billed in addition to another lung function test done at the same visit.

Hospitals typically charge $260 cash for this outpatient procedure — the median across 2,922 hospitals that filed a usable cash price; the average of the middle 60% is $272. Most fall between $120 and $479 (20th–80th percentile).

Hospitals
2,922
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 2,922 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
$74$148$260$424$708

The most expensive tenth of hospitals charges at least 9.6× what the cheapest tenth charges ($74 vs $708).

How the prices are spread

$39 – $54: 60 hospitals$39$54 – $76: 99 hospitals$76 – $107: 172 hospitals$76$107 – $151: 268 hospitals$151 – $213: 413 hospitals$151$213 – $300: 537 hospitals$300 – $422: 496 hospitals$300$422 – $594: 343 hospitals$594 – $836: 164 hospitals$594$836 – $1,177: 78 hospitals$836median $260price bands are equal on a log scale
Hospitals per price band (2,630 of 2,922 — the bands cover the 5th to 95th percentile)
FromToHospitals
$39$5460
$54$7699
$76$107172
$107$151268
$151$213413
$213$300537
$300$422496
$422$594343
$594$836164
$836$1,17778

By state

The median cash price in each state, against the national median of $260.

Alaska: median $322 across 10 hospitalsAK$322Maine: median $144 across 24 hospitalsME$144Vermont: median $118 across 11 hospitalsVT$118New Hampshire: median $198 across 23 hospitalsNH$198Washington: median $216 across 60 hospitalsWA$216Idaho: median $243 across 18 hospitalsID$243Montana: median $141 across 19 hospitalsMT$141North Dakota: median $216 across 15 hospitalsND$216Minnesota: median $178 across 81 hospitalsMN$178Illinois: median $273 across 126 hospitalsIL$273Wisconsin: median $285 across 98 hospitalsWI$285Michigan: median $158 across 81 hospitalsMI$158New York: median $193 across 91 hospitalsNY$193Massachusetts: median $254 across 48 hospitalsMA$254Oregon: median $161 across 52 hospitalsOR$161Nevada: median $251 across 16 hospitalsNV$251Wyoming: median $252 across 14 hospitalsWY$252South Dakota: median $363 across 21 hospitalsSD$363Iowa: median $208 across 77 hospitalsIA$208Indiana: median $247 across 83 hospitalsIN$247Ohio: median $273 across 128 hospitalsOH$273Pennsylvania: median $360 across 104 hospitalsPA$360New Jersey: median $191 across 43 hospitalsNJ$191Connecticut: median $261 across 22 hospitalsCT$261Rhode Island: 6 hospitals filed a usable price — fewer than 10, so no figureRICalifornia: median $449 across 204 hospitalsCA$449Utah: median $243 across 38 hospitalsUT$243Colorado: median $308 across 63 hospitalsCO$308Nebraska: median $487 across 66 hospitalsNE$487Missouri: median $312 across 77 hospitalsMO$312Kentucky: median $193 across 62 hospitalsKY$193West Virginia: median $178 across 39 hospitalsWV$178Virginia: median $301 across 67 hospitalsVA$301Maryland: median $177 across 37 hospitalsMD$177Delaware: 7 hospitals filed a usable price — fewer than 10, so no figureDEArizona: median $303 across 45 hospitalsAZ$303New Mexico: median $263 across 24 hospitalsNM$263Kansas: median $180 across 65 hospitalsKS$180Arkansas: median $69 across 30 hospitalsAR$69Tennessee: median $161 across 71 hospitalsTN$161North Carolina: median $254 across 87 hospitalsNC$254South Carolina: median $291 across 49 hospitalsSC$291Oklahoma: median $212 across 51 hospitalsOK$212Louisiana: median $133 across 46 hospitalsLA$133Mississippi: median $112 across 39 hospitalsMS$112Alabama: median $162 across 32 hospitalsAL$162Georgia: median $326 across 95 hospitalsGA$326Hawaii: median $244 across 16 hospitalsHI$244Texas: median $395 across 193 hospitalsTX$395Florida: median $491 across 148 hospitalsFL$491
Cash price by state, most expensive first. National median $260. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
Florida FL148$491+89%$286 – $1,227
Nebraska NE66$487+87%$348 – $602
California CA204$449+72%$230 – $734
Texas TX193$395+52%$179 – $962
South Dakota SD21$363+39%$277 – $409
Pennsylvania PA104$360+38%$125 – $873
Georgia GA95$326+25%$160 – $613
Alaska AK10$322+24%$82 – $509
Missouri MO77$312+20%$117 – $489
Colorado CO63$308+18%$175 – $742
Arizona AZ45$303+16%$109 – $701
Virginia VA67$301+16%$169 – $582
South Carolina SC49$291+12%$213 – $478
Wisconsin WI98$285+9%$157 – $394
Ohio OH128$273+5%$153 – $431
Illinois IL126$273+5%$113 – $488
New Mexico NM24$263+1%$122 – $392
Connecticut CT22$2610%$124 – $497
North Carolina NC87$254−2%$127 – $370
Massachusetts MA48$254−2%$136 – $347
Wyoming WY14$252−3%$170 – $377
Nevada NV16$251−4%$199 – $425
Indiana IN83$247−5%$110 – $346
Hawaii HI16$244−6%$187 – $296
Idaho ID18$243−7%$124 – $360
Utah UT38$243−7%$243 – $400
North Dakota ND15$216−17%$119 – $361
Washington WA60$216−17%$108 – $371
Oklahoma OK51$212−19%$144 – $397
Iowa IA77$208−20%$130 – $280
New Hampshire NH23$198−24%$103 – $476
Kentucky KY62$193−26%$98 – $388
New York NY91$193−26%$86 – $394
New Jersey NJ43$191−27%$126 – $459
Kansas KS65$180−31%$98 – $300
Minnesota MN81$178−32%$119 – $267
West Virginia WV39$178−32%$100 – $272
Maryland MD37$177−32%$72 – $340
Alabama AL32$162−38%$76 – $465
Tennessee TN71$161−38%$98 – $298
Oregon OR52$161−38%$85 – $320
Michigan MI81$158−39%$84 – $298
Maine ME24$144−45%$42 – $302
Montana MT19$141−46%$68 – $330
Louisiana LA46$133−49%$82 – $263
Vermont VT11$118−55%$53 – $295
Mississippi MS39$112−57%$59 – $166
Arkansas AR30$69−73%$33 – $156
Delaware DE7not enough hospitals filed a usable price
Rhode Island RI6not 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 $260.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care2,147$277$127 – $508
Children’s64$428$244 – $621
Critical access701$228$102 – $369
Ownership
For-profit392$410$171 – $1,245
Government482$216$95 – $388
Non-profit2,038$255$124 – $449
System affiliation
Part of a system2,405$278$135 – $504
Independent517$186$83 – $360

Cash price vs list price

Median list price (chargemaster)$438
Median cash price$260
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

2,080 hospitals filed a usable inpatient cash price for this code. The median is $268 and the average of the middle 60% is $279; most fall between $131 and $478.

Cash price percentiles, inpatient, across 2,080 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
$76$157$268$428$658

The most expensive tenth of hospitals charges at least 8.6× what the cheapest tenth charges ($76 vs $658).

Of the 2,236 hospitals that filed this code inpatient, 2,080 gave a usable cash price; 52 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 104 a list price only.

How complete is this

2,922 of the 3,956 hospitals with a price file in our corpus (74%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 3,205 hospitals that filed this code at all gave us
Usable cash price — counted2,922
Cash price carrying a plausibility flag — shown on the compare tool, excluded here108
A number the filing itself marks as not a price (a placeholder, a ratio) — excluded0
An estimate rather than a filed cash price — excluded2
A list price only, no cash figure — excluded173
Hospitals that filed this code3,205

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 Other diagnostic procedures on lung and bronchus family.

Hospitals file this code under descriptions such as Co Diffusing Capacity|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, “Gas transfer test added to other lung function tests (CPT 94729) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-94729-gas-transfer-test-added-to-other-lung-function-tests