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Procedure price report · Microscopic examination (bacterial smear, culture, toxicology)

Extra high-resolution chromosome study

CPT 88289the billing code this page is about

Add-on charge for additional high-resolution examination of chromosomes to look for small structural changes; billed per study.

Hospitals typically charge $144 cash for this outpatient procedure — the median across 1,176 hospitals that filed a usable cash price; the average of the middle 60% is $153. Most fall between $64 and $312 (20th–80th percentile).

Hospitals
1,176
States
50
Filings dated
Dec 2023 – Sep 2026
Computed
September 25, 2026
Prices checked
through September 24, 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 1,176 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
$43$75$144$260$439

The most expensive tenth of hospitals charges at least 10× what the cheapest tenth charges ($43 vs $439).

How the prices are spread

$34 – $46: 83 hospitals$34$46 – $62: 91 hospitals$62 – $83: 108 hospitals$62$83 – $111: 130 hospitals$111 – $148: 151 hospitals$111$148 – $199: 173 hospitals$199 – $266: 122 hospitals$199$266 – $357: 88 hospitals$357 – $478: 85 hospitals$357$478 – $640: 42 hospitals$478median $144price bands are equal on a log scale
Hospitals per price band (1,073 of 1,176 — the bands cover the 5th to 95th percentile)
FromToHospitals
$34$4683
$46$6291
$62$83108
$83$111130
$111$148151
$148$199173
$199$266122
$266$35788
$357$47885
$478$64042

By state

The median cash price in each state, against the national median of $144.

Alaska: 4 hospitals filed a usable price — fewer than 10, so no figureAKMaine: 6 hospitals filed a usable price — fewer than 10, so no figureMEVermont: 1 hospital filed a usable price — fewer than 10, so no figureVTNew Hampshire: 1 hospital filed a usable price — fewer than 10, so no figureNHWashington: median $114 across 34 hospitalsWA$114Idaho: 3 hospitals filed a usable price — fewer than 10, so no figureIDMontana: 1 hospital filed a usable price — fewer than 10, so no figureMTNorth Dakota: 1 hospital filed a usable price — fewer than 10, so no figureNDMinnesota: median $212 across 17 hospitalsMN$212Illinois: median $108 across 64 hospitalsIL$108Wisconsin: median $259 across 53 hospitalsWI$259Michigan: median $87 across 18 hospitalsMI$87New York: median $52 across 45 hospitalsNY$52Massachusetts: median $116 across 17 hospitalsMA$116Oregon: median $88 across 18 hospitalsOR$88Nevada: 8 hospitals filed a usable price — fewer than 10, so no figureNVWyoming: 5 hospitals filed a usable price — fewer than 10, so no figureWYSouth Dakota: 2 hospitals filed a usable price — fewer than 10, so no figureSDIowa: median $128 across 15 hospitalsIA$128Indiana: median $87 across 54 hospitalsIN$87Ohio: median $138 across 97 hospitalsOH$138Pennsylvania: median $65 across 50 hospitalsPA$65New Jersey: median $38 across 43 hospitalsNJ$38Connecticut: 8 hospitals filed a usable price — fewer than 10, so no figureCTRhode Island: 6 hospitals filed a usable price — fewer than 10, so no figureRICalifornia: median $159 across 60 hospitalsCA$159Utah: 6 hospitals filed a usable price — fewer than 10, so no figureUTColorado: median $199 across 36 hospitalsCO$199Nebraska: median $95 across 16 hospitalsNE$95Missouri: median $175 across 17 hospitalsMO$175Kentucky: median $120 across 32 hospitalsKY$120West Virginia: 9 hospitals filed a usable price — fewer than 10, so no figureWVVirginia: median $155 across 45 hospitalsVA$155Maryland: median $265 across 25 hospitalsMD$265Delaware: 3 hospitals filed a usable price — fewer than 10, so no figureDEArizona: median $102 across 15 hospitalsAZ$102New Mexico: 8 hospitals filed a usable price — fewer than 10, so no figureNMKansas: median $554 across 23 hospitalsKS$554Arkansas: 6 hospitals filed a usable price — fewer than 10, so no figureARTennessee: median $71 across 20 hospitalsTN$71North Carolina: median $138 across 28 hospitalsNC$138South Carolina: median $265 across 31 hospitalsSC$265Oklahoma: median $109 across 25 hospitalsOK$109Louisiana: 6 hospitals filed a usable price — fewer than 10, so no figureLAMississippi: median $182 across 15 hospitalsMS$182Alabama: 7 hospitals filed a usable price — fewer than 10, so no figureALGeorgia: median $147 across 31 hospitalsGA$147Hawaii: 9 hospitals filed a usable price — fewer than 10, so no figureHITexas: median $187 across 84 hospitalsTX$187Florida: median $179 across 48 hospitalsFL$179
Cash price by state, most expensive first. National median $144. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
Kansas KS23$554+284%$348 – $680
South Carolina SC31$265+84%$235 – $272
Maryland MD25$265+84%$167 – $312
Wisconsin WI53$259+80%$118 – $424
Minnesota MN17$212+47%$212 – $268
Colorado CO36$199+38%$107 – $554
Texas TX84$187+30%$115 – $335
Mississippi MS15$182+27%$48 – $371
Florida FL48$179+24%$80 – $318
Missouri MO17$175+21%$126 – $568
California CA60$159+10%$83 – $178
Virginia VA45$155+7%$109 – $280
Georgia GA31$147+2%$119 – $404
Ohio OH97$138−4%$85 – $247
North Carolina NC28$138−4%$39 – $339
Iowa IA15$128−11%$95 – $128
Kentucky KY32$120−17%$62 – $434
Massachusetts MA17$116−20%$52 – $572
Washington WA34$114−21%$62 – $640
Oklahoma OK25$109−25%$74 – $144
Illinois IL64$108−25%$72 – $321
Arizona AZ15$102−29%$37 – $308
Nebraska NE16$95−34%$64 – $164
Oregon OR18$88−39%$73 – $139
Indiana IN54$87−39%$56 – $193
Michigan MI18$87−40%$48 – $260
Tennessee TN20$71−51%$45 – $104
Pennsylvania PA50$65−55%$34 – $522
New York NY45$52−64%$34 – $185
New Jersey NJ43$38−74%$34 – $100
Hawaii HI9not enough hospitals filed a usable price
West Virginia WV9not enough hospitals filed a usable price
Connecticut CT8not enough hospitals filed a usable price
New Mexico NM8not enough hospitals filed a usable price
Nevada NV8not enough hospitals filed a usable price
Alabama AL7not enough hospitals filed a usable price
Arkansas AR6not enough hospitals filed a usable price
Louisiana LA6not enough hospitals filed a usable price
Maine ME6not enough hospitals filed a usable price
Rhode Island RI6not enough hospitals filed a usable price
Utah UT6not enough hospitals filed a usable price
Wyoming WY5not enough hospitals filed a usable price
Alaska AK4not enough hospitals filed a usable price
Delaware DE3not enough hospitals filed a usable price
Idaho ID3not enough hospitals filed a usable price
South Dakota SD2not enough hospitals filed a usable price
Montana MT1not enough hospitals filed a usable price
North Dakota ND1not enough hospitals filed a usable price
New Hampshire NH1not 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 $144.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care961$144$61 – $305
Children’s33$142$62 – $213
Critical access176$150$87 – $320
Ownership
For-profit150$197$82 – $486
Government145$133$70 – $317
Non-profit875$140$62 – $272
System affiliation
Part of a system1,006$147$63 – $308
Independent170$123$69 – $320

Cash price vs list price

Median list price (chargemaster)$249
Median cash price$144
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

831 hospitals filed a usable inpatient cash price for this code. The median is $154 and the average of the middle 60% is $161; most fall between $79 and $298.

Cash price percentiles, inpatient, across 831 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
$53$87$154$259$432

The most expensive tenth of hospitals charges at least 8.2× what the cheapest tenth charges ($53 vs $432).

Of the 930 hospitals that filed this code inpatient, 831 gave a usable cash price; 50 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 49 a list price only.

How complete is this

1,176 of the 3,956 hospitals with a price file in our corpus (30%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 1,289 hospitals that filed this code at all gave us
Usable cash price — counted1,176
Cash price carrying a plausibility flag — shown on the compare tool, excluded here58
A number the filing itself marks as not a price (a placeholder, a ratio) — excluded1
An estimate rather than a filed cash price — excluded1
A list price only, no cash figure — excluded53
Hospitals that filed this code1,289

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 September 4, 2026 and September 24, 2026; the figures were computed September 25, 2026 from filings loaded through September 24, 2026. The percentiles and averages use only the “counted” row.

Related procedures

Part of the Microscopic examination (bacterial smear, culture, toxicology) family.

Hospitals file this code under descriptions such as CHROMOSOME STUDY ADDITIONAL.

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, “Extra high-resolution chromosome study (CPT 88289) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-88289-extra-high-resolution-chromosome-study