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Procedure price report · Laboratory - Chemistry and Hematology

C-peptide blood test

CPT 84681the billing code this page is about

Measures C-peptide, a substance released along with insulin, to gauge how much insulin the body is making. Covers one measurement.

Hospitals typically charge $86 cash for this outpatient procedure — the median across 3,281 hospitals that filed a usable cash price; the average of the middle 60% is $91. Most fall between $36 and $167 (20th–80th percentile).

Hospitals
3,281
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 3,281 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
$23$43$86$151$233

The most expensive tenth of hospitals charges at least 10× what the cheapest tenth charges ($23 vs $233).

How the prices are spread

$14 – $20: 94 hospitals$14$20 – $27: 181 hospitals$27 – $37: 253 hospitals$27$37 – $51: 282 hospitals$51 – $70: 371 hospitals$51$70 – $97: 482 hospitals$97 – $133: 464 hospitals$97$133 – $183: 452 hospitals$183 – $251: 259 hospitals$183$251 – $345: 116 hospitals$251median $86price bands are equal on a log scale
Hospitals per price band (2,954 of 3,281 — the bands cover the 5th to 95th percentile)
FromToHospitals
$14$2094
$20$27181
$27$37253
$37$51282
$51$70371
$70$97482
$97$133464
$133$183452
$183$251259
$251$345116

By state

The median cash price in each state, against the national median of $86.

Alaska: median $160 across 17 hospitalsAK$160Maine: median $56 across 28 hospitalsME$56Vermont: median $145 across 14 hospitalsVT$145New Hampshire: median $116 across 25 hospitalsNH$116Washington: median $102 across 78 hospitalsWA$102Idaho: median $90 across 23 hospitalsID$90Montana: median $145 across 29 hospitalsMT$145North Dakota: median $118 across 32 hospitalsND$118Minnesota: median $108 across 106 hospitalsMN$108Illinois: median $112 across 138 hospitalsIL$112Wisconsin: median $86 across 104 hospitalsWI$86Michigan: median $57 across 89 hospitalsMI$57New York: median $75 across 104 hospitalsNY$75Massachusetts: median $117 across 52 hospitalsMA$117Oregon: median $90 across 50 hospitalsOR$90Nevada: median $102 across 20 hospitalsNV$102Wyoming: median $59 across 16 hospitalsWY$59South Dakota: median $174 across 34 hospitalsSD$174Iowa: median $105 across 86 hospitalsIA$105Indiana: median $108 across 97 hospitalsIN$108Ohio: median $65 across 140 hospitalsOH$65Pennsylvania: median $87 across 121 hospitalsPA$87New Jersey: median $24 across 57 hospitalsNJ$24Connecticut: median $100 across 23 hospitalsCT$100Rhode Island: median $87 across 10 hospitalsRI$87California: median $37 across 145 hospitalsCA$37Utah: median $61 across 41 hospitalsUT$61Colorado: median $89 across 64 hospitalsCO$89Nebraska: median $132 across 76 hospitalsNE$132Missouri: median $91 across 74 hospitalsMO$91Kentucky: median $149 across 68 hospitalsKY$149West Virginia: median $74 across 43 hospitalsWV$74Virginia: median $109 across 73 hospitalsVA$109Maryland: median $41 across 41 hospitalsMD$41Delaware: 7 hospitals filed a usable price — fewer than 10, so no figureDEArizona: median $124 across 39 hospitalsAZ$124New Mexico: median $117 across 27 hospitalsNM$117Kansas: median $92 across 90 hospitalsKS$92Arkansas: median $46 across 37 hospitalsAR$46Tennessee: median $60 across 79 hospitalsTN$60North Carolina: median $70 across 89 hospitalsNC$70South Carolina: median $128 across 52 hospitalsSC$128Oklahoma: median $80 across 73 hospitalsOK$80Louisiana: median $56 across 50 hospitalsLA$56Mississippi: median $67 across 57 hospitalsMS$67Alabama: median $70 across 44 hospitalsAL$70Georgia: median $95 across 109 hospitalsGA$95Hawaii: median $105 across 18 hospitalsHI$105Texas: median $73 across 240 hospitalsTX$73Florida: median $39 across 152 hospitalsFL$39
Cash price by state, most expensive first. National median $86. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
South Dakota SD34$174+101%$51 – $236
Alaska AK17$160+85%$53 – $231
Kentucky KY68$149+72%$70 – $332
Vermont VT14$145+68%$77 – $305
Montana MT29$145+67%$90 – $159
Nebraska NE76$132+53%$83 – $178
South Carolina SC52$128+48%$68 – $161
Arizona AZ39$124+43%$35 – $206
North Dakota ND32$118+36%$39 – $175
Massachusetts MA52$117+36%$65 – $182
New Mexico NM27$117+35%$79 – $181
New Hampshire NH25$116+34%$64 – $225
Illinois IL138$112+30%$71 – $231
Virginia VA73$109+26%$36 – $195
Minnesota MN106$108+25%$45 – $166
Indiana IN97$108+25%$37 – $238
Hawaii HI18$105+22%$28 – $200
Iowa IA86$105+22%$64 – $172
Nevada NV20$102+18%$30 – $192
Washington WA78$102+18%$75 – $163
Connecticut CT23$100+15%$75 – $173
Georgia GA109$95+9%$40 – $184
Kansas KS90$92+6%$61 – $147
Missouri MO74$91+5%$58 – $167
Idaho ID23$90+4%$13 – $154
Oregon OR50$90+4%$50 – $120
Colorado CO64$89+3%$44 – $149
Rhode Island RI10$87+1%$48 – $166
Pennsylvania PA121$870%$32 – $240
Wisconsin WI104$86−1%$53 – $151
Oklahoma OK73$80−8%$52 – $138
New York NY104$75−13%$25 – $188
West Virginia WV43$74−15%$37 – $137
Texas TX240$73−16%$29 – $228
North Carolina NC89$70−19%$14 – $159
Alabama AL44$70−19%$29 – $190
Mississippi MS57$67−23%$24 – $111
Ohio OH140$65−25%$34 – $128
Utah UT41$61−29%$52 – $124
Tennessee TN79$60−30%$36 – $122
Wyoming WY16$59−32%$40 – $136
Michigan MI89$57−34%$29 – $96
Maine ME28$56−35%$29 – $164
Louisiana LA50$56−35%$32 – $97
Arkansas AR37$46−46%$27 – $80
Maryland MD41$41−52%$32 – $49
Florida FL152$39−55%$14 – $151
California CA145$37−57%$10 – $121
New Jersey NJ57$24−72%$23 – $71
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 $86.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care2,256$78$31 – $163
Children’s62$108$38 – $176
Critical access953$105$52 – $174
Ownership
For-profit445$103$40 – $340
Government626$88$38 – $161
Non-profit2,200$83$36 – $155
System affiliation
Part of a system2,657$86$36 – $171
Independent624$88$41 – $159

Cash price vs list price

Median list price (chargemaster)$144
Median cash price$86
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

2,208 hospitals filed a usable inpatient cash price for this code. The median is $85 and the average of the middle 60% is $89; most fall between $37 and $162.

Cash price percentiles, inpatient, across 2,208 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
$24$44$85$145$216

The most expensive tenth of hospitals charges at least 9.0× what the cheapest tenth charges ($24 vs $216).

Of the 2,438 hospitals that filed this code inpatient, 2,208 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 111 a list price only.

How complete is this

3,281 of the 3,956 hospitals with a price file in our corpus (83%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 3,578 hospitals that filed this code at all gave us
Usable cash price — counted3,281
Cash price carrying a plausibility flag — shown on the compare tool, excluded here164
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 — excluded132
Hospitals that filed this code3,578

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 C-Peptide.

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, “C-peptide blood test (CPT 84681) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-84681-c-peptide-blood-test