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Procedure price report · Laboratory - Chemistry and Hematology

Ammonia blood test

CPT 82140the billing code this page is about

Measures the level of ammonia in a blood sample.

Hospitals typically charge $82 cash for this outpatient procedure — the median across 3,383 hospitals that filed a usable cash price; the average of the middle 60% is $86. Most fall between $35 and $162 (20th–80th percentile).

Hospitals
3,383
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 3,383 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
$21$43$82$143$246

The most expensive tenth of hospitals charges at least 12× what the cheapest tenth charges ($21 vs $246).

How the prices are spread

$15 – $20: 170 hospitals$15$20 – $28: 175 hospitals$28 – $40: 278 hospitals$28$40 – $55: 371 hospitals$55 – $77: 481 hospitals$55$77 – $108: 499 hospitals$108 – $151: 470 hospitals$108$151 – $211: 333 hospitals$211 – $294: 170 hospitals$211$294 – $411: 111 hospitals$294median $82price bands are equal on a log scale
Hospitals per price band (3,058 of 3,383 — the bands cover the 5th to 95th percentile)
FromToHospitals
$15$20170
$20$28175
$28$40278
$40$55371
$55$77481
$77$108499
$108$151470
$151$211333
$211$294170
$294$411111

By state

The median cash price in each state, against the national median of $82.

Alaska: median $164 across 19 hospitalsAK$164Maine: median $88 across 28 hospitalsME$88Vermont: median $132 across 14 hospitalsVT$132New Hampshire: median $81 across 25 hospitalsNH$81Washington: median $111 across 77 hospitalsWA$111Idaho: median $65 across 24 hospitalsID$65Montana: median $105 across 31 hospitalsMT$105North Dakota: median $95 across 33 hospitalsND$95Minnesota: median $67 across 107 hospitalsMN$67Illinois: median $94 across 145 hospitalsIL$94Wisconsin: median $85 across 108 hospitalsWI$85Michigan: median $48 across 98 hospitalsMI$48New York: median $47 across 107 hospitalsNY$47Massachusetts: median $93 across 53 hospitalsMA$93Oregon: median $71 across 51 hospitalsOR$71Nevada: median $130 across 22 hospitalsNV$130Wyoming: median $84 across 16 hospitalsWY$84South Dakota: median $196 across 39 hospitalsSD$196Iowa: median $90 across 88 hospitalsIA$90Indiana: median $89 across 96 hospitalsIN$89Ohio: median $56 across 139 hospitalsOH$56Pennsylvania: median $64 across 122 hospitalsPA$64New Jersey: median $17 across 57 hospitalsNJ$17Connecticut: median $68 across 23 hospitalsCT$68Rhode Island: median $102 across 10 hospitalsRI$102California: median $181 across 163 hospitalsCA$181Utah: median $77 across 42 hospitalsUT$77Colorado: median $125 across 70 hospitalsCO$125Nebraska: median $130 across 83 hospitalsNE$130Missouri: median $62 across 77 hospitalsMO$62Kentucky: median $93 across 69 hospitalsKY$93West Virginia: median $39 across 44 hospitalsWV$39Virginia: median $92 across 73 hospitalsVA$92Maryland: median $54 across 41 hospitalsMD$54Delaware: 7 hospitals filed a usable price — fewer than 10, so no figureDEArizona: median $127 across 42 hospitalsAZ$127New Mexico: median $91 across 30 hospitalsNM$91Kansas: median $76 across 92 hospitalsKS$76Arkansas: median $54 across 39 hospitalsAR$54Tennessee: median $49 across 83 hospitalsTN$49North Carolina: median $68 across 85 hospitalsNC$68South Carolina: median $98 across 53 hospitalsSC$98Oklahoma: median $58 across 72 hospitalsOK$58Louisiana: median $50 across 52 hospitalsLA$50Mississippi: median $59 across 55 hospitalsMS$59Alabama: median $76 across 44 hospitalsAL$76Georgia: median $76 across 110 hospitalsGA$76Hawaii: median $120 across 20 hospitalsHI$120Texas: median $146 across 250 hospitalsTX$146Florida: median $123 across 155 hospitalsFL$123
Cash price by state, most expensive first. National median $82. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
South Dakota SD39$196+139%$102 – $285
California CA163$181+121%$18 – $377
Alaska AK19$164+100%$17 – $230
Texas TX250$146+78%$57 – $236
Vermont VT14$132+61%$41 – $258
Nevada NV22$130+59%$71 – $216
Nebraska NE83$130+59%$65 – $171
Arizona AZ42$127+55%$26 – $510
Colorado CO70$125+53%$68 – $191
Florida FL155$123+51%$26 – $740
Hawaii HI20$120+47%$73 – $144
Washington WA77$111+36%$65 – $163
Montana MT31$105+29%$84 – $154
Rhode Island RI10$102+24%$34 – $116
South Carolina SC53$98+19%$62 – $119
North Dakota ND33$95+16%$28 – $116
Illinois IL145$94+15%$45 – $178
Kentucky KY69$93+14%$44 – $193
Massachusetts MA53$93+14%$50 – $126
Virginia VA73$92+12%$26 – $171
New Mexico NM30$91+11%$65 – $135
Iowa IA88$90+10%$62 – $145
Indiana IN96$89+9%$27 – $185
Maine ME28$88+8%$30 – $186
Wisconsin WI108$85+4%$55 – $115
Wyoming WY16$84+3%$28 – $140
New Hampshire NH25$81−1%$47 – $170
Utah UT42$77−6%$65 – $151
Kansas KS92$76−7%$55 – $117
Alabama AL44$76−8%$22 – $219
Georgia GA110$76−8%$32 – $152
Oregon OR51$71−13%$38 – $111
Connecticut CT23$68−17%$51 – $121
North Carolina NC85$68−18%$33 – $101
Minnesota MN107$67−18%$32 – $115
Idaho ID24$65−20%$29 – $108
Pennsylvania PA122$64−22%$23 – $152
Missouri MO77$62−24%$43 – $112
Mississippi MS55$59−28%$30 – $81
Oklahoma OK72$58−30%$36 – $100
Ohio OH139$56−31%$36 – $107
Arkansas AR39$54−34%$37 – $74
Maryland MD41$54−34%$42 – $65
Louisiana LA52$50−38%$19 – $79
Tennessee TN83$49−41%$26 – $120
Michigan MI98$48−41%$18 – $93
New York NY107$47−42%$18 – $111
West Virginia WV44$39−53%$29 – $124
New Jersey NJ57$17−80%$16 – $49
Delaware DE7not 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 $82.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care2,316$77$32 – $178
Children’s65$109$47 – $147
Critical access992$88$44 – $149
Ownership
For-profit474$137$49 – $510
Government649$84$33 – $151
Non-profit2,250$74$34 – $146
System affiliation
Part of a system2,731$82$34 – $166
Independent652$82$39 – $154

Cash price vs list price

Median list price (chargemaster)$141
Median cash price$82
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

2,284 hospitals filed a usable inpatient cash price for this code. The median is $83 and the average of the middle 60% is $86; most fall between $36 and $159.

Cash price percentiles, inpatient, across 2,284 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
$21$44$83$142$223

The most expensive tenth of hospitals charges at least 10× what the cheapest tenth charges ($21 vs $223).

Of the 2,516 hospitals that filed this code inpatient, 2,284 gave a usable cash price; 119 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 113 a list price only.

How complete is this

3,383 of the 3,956 hospitals with a price file in our corpus (86%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 3,687 hospitals that filed this code at all gave us
Usable cash price — counted3,383
Cash price carrying a plausibility flag — shown on the compare tool, excluded here168
A number the filing itself marks as not a price (a placeholder, a ratio) — excluded0
An estimate rather than a filed cash price — excluded1
A list price only, no cash figure — excluded135
Hospitals that filed this code3,687

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 Laboratory - Chemistry and Hematology family.

Hospitals file this code under descriptions such as HC Ammonia.

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, “Ammonia blood test (CPT 82140) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-82140-ammonia-blood-test