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Procedure price report · Pathology

Chromosomal microarray with SNP analysis

CPT 81229the billing code this page is about

A whole-genome microarray test that scans for extra or missing chromosome segments and also reads single-letter DNA markers in the same run.

Hospitals typically charge $1,530 cash for this outpatient procedure — the median across 2,217 hospitals that filed a usable cash price; the average of the middle 60% is $1,623. Most fall between $850 and $2,944 (20th–80th percentile).

Hospitals
2,217
States
50
Filings dated
Dec 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 2,217 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
$592$978$1,530$2,618$4,477

The most expensive tenth of hospitals charges at least 7.6× what the cheapest tenth charges ($592 vs $4,477).

How the prices are spread

$414 – $540: 81 hospitals$414$540 – $703: 117 hospitals$703 – $915: 193 hospitals$703$915 – $1,191: 300 hospitals$1,191 – $1,550: 327 hospitals$1,191$1,550 – $2,019: 335 hospitals$2,019 – $2,628: 216 hospitals$2,019$2,628 – $3,422: 179 hospitals$3,422 – $4,455: 136 hospitals$3,422$4,455 – $5,800: 117 hospitals$4,455median $1,530price bands are equal on a log scale
Hospitals per price band (2,001 of 2,217 — the bands cover the 5th to 95th percentile)
FromToHospitals
$414$54081
$540$703117
$703$915193
$915$1,191300
$1,191$1,550327
$1,550$2,019335
$2,019$2,628216
$2,628$3,422179
$3,422$4,455136
$4,455$5,800117

By state

The median cash price in each state, against the national median of $1,530.

Alaska: median $1,737 across 12 hospitalsAK$1,737Maine: median $1,307 across 20 hospitalsME$1,307Vermont: 9 hospitals filed a usable price — fewer than 10, so no figureVTNew Hampshire: median $1,095 across 18 hospitalsNH$1,095Washington: median $1,169 across 51 hospitalsWA$1,169Idaho: median $1,435 across 17 hospitalsID$1,435Montana: 9 hospitals filed a usable price — fewer than 10, so no figureMTNorth Dakota: median $1,527 across 17 hospitalsND$1,527Minnesota: median $1,062 across 78 hospitalsMN$1,062Illinois: median $2,335 across 101 hospitalsIL$2,335Wisconsin: median $1,931 across 89 hospitalsWI$1,931Michigan: median $832 across 67 hospitalsMI$832New York: median $1,583 across 76 hospitalsNY$1,583Massachusetts: median $2,899 across 45 hospitalsMA$2,899Oregon: median $1,320 across 36 hospitalsOR$1,320Nevada: median $1,657 across 14 hospitalsNV$1,657Wyoming: median $2,420 across 13 hospitalsWY$2,420South Dakota: median $1,542 across 14 hospitalsSD$1,542Iowa: median $1,338 across 42 hospitalsIA$1,338Indiana: median $1,727 across 82 hospitalsIN$1,727Ohio: median $1,352 across 106 hospitalsOH$1,352Pennsylvania: median $2,239 across 89 hospitalsPA$2,239New Jersey: median $1,276 across 49 hospitalsNJ$1,276Connecticut: median $1,674 across 17 hospitalsCT$1,674Rhode Island: 7 hospitals filed a usable price — fewer than 10, so no figureRICalifornia: median $978 across 96 hospitalsCA$978Utah: median $4,625 across 35 hospitalsUT$4,625Colorado: median $1,503 across 41 hospitalsCO$1,503Nebraska: median $1,547 across 15 hospitalsNE$1,547Missouri: median $1,741 across 59 hospitalsMO$1,741Kentucky: median $2,176 across 45 hospitalsKY$2,176West Virginia: median $752 across 30 hospitalsWV$752Virginia: median $1,584 across 58 hospitalsVA$1,584Maryland: median $1,578 across 38 hospitalsMD$1,578Delaware: 7 hospitals filed a usable price — fewer than 10, so no figureDEArizona: median $1,705 across 31 hospitalsAZ$1,705New Mexico: median $1,466 across 11 hospitalsNM$1,466Kansas: median $1,929 across 30 hospitalsKS$1,929Arkansas: median $1,236 across 21 hospitalsAR$1,236Tennessee: median $858 across 37 hospitalsTN$858North Carolina: median $1,092 across 71 hospitalsNC$1,092South Carolina: median $2,621 across 37 hospitalsSC$2,621Oklahoma: median $1,296 across 44 hospitalsOK$1,296Louisiana: median $1,355 across 39 hospitalsLA$1,355Mississippi: median $656 across 28 hospitalsMS$656Alabama: median $1,433 across 22 hospitalsAL$1,433Georgia: median $1,551 across 81 hospitalsGA$1,551Hawaii: 7 hospitals filed a usable price — fewer than 10, so no figureHITexas: median $1,592 across 162 hospitalsTX$1,592Florida: median $1,120 across 94 hospitalsFL$1,120
Cash price by state, most expensive first. National median $1,530. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
Utah UT35$4,625+202%$1,851 – $5,441
Massachusetts MA45$2,899+89%$1,719 – $4,477
South Carolina SC37$2,621+71%$1,104 – $2,873
Wyoming WY13$2,420+58%$1,795 – $3,395
Illinois IL101$2,335+53%$743 – $3,932
Pennsylvania PA89$2,239+46%$760 – $6,464
Kentucky KY45$2,176+42%$1,076 – $2,854
Wisconsin WI89$1,931+26%$1,175 – $3,086
Kansas KS30$1,929+26%$993 – $2,437
Missouri MO59$1,741+14%$1,031 – $2,771
Alaska AK12$1,737+14%$1,074 – $5,317
Indiana IN82$1,727+13%$1,147 – $2,374
Arizona AZ31$1,705+11%$1,244 – $18,509
Connecticut CT17$1,674+9%$1,281 – $3,632
Nevada NV14$1,657+8%$631 – $2,436
Texas TX162$1,592+4%$869 – $4,830
Virginia VA58$1,584+3%$973 – $3,175
New York NY76$1,583+3%$1,160 – $3,622
Maryland MD38$1,578+3%$825 – $2,460
Georgia GA81$1,551+1%$1,082 – $2,160
Nebraska NE15$1,547+1%$628 – $2,784
South Dakota SD14$1,542+1%$460 – $4,923
North Dakota ND17$1,5270%$886 – $3,472
Colorado CO41$1,503−2%$1,165 – $2,484
New Mexico NM11$1,466−4%$1,113 – $2,995
Idaho ID17$1,435−6%$960 – $3,232
Alabama AL22$1,433−6%$1,040 – $2,960
Louisiana LA39$1,355−11%$538 – $2,158
Ohio OH106$1,352−12%$976 – $3,110
Iowa IA42$1,338−13%$1,114 – $2,325
Oregon OR36$1,320−14%$971 – $2,641
Maine ME20$1,307−15%$854 – $3,221
Oklahoma OK44$1,296−15%$913 – $2,485
New Jersey NJ49$1,276−17%$1,160 – $1,334
Arkansas AR21$1,236−19%$547 – $1,425
Washington WA51$1,169−24%$434 – $2,777
Florida FL94$1,120−27%$648 – $2,418
New Hampshire NH18$1,095−28%$667 – $2,915
North Carolina NC71$1,092−29%$686 – $1,664
Minnesota MN78$1,062−31%$531 – $1,513
California CA96$978−36%$878 – $2,000
Tennessee TN37$858−44%$623 – $3,946
Michigan MI67$832−46%$650 – $1,583
West Virginia WV30$752−51%$752 – $3,182
Mississippi MS28$656−57%$335 – $1,452
Montana MT9not enough hospitals filed a usable price
Vermont VT9not enough hospitals filed a usable price
Delaware DE7not enough hospitals filed a usable price
Hawaii HI7not enough hospitals filed a usable price
Rhode Island RI7not 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 $1,530.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care1,724$1,500$832 – $2,854
Children’s49$1,357$890 – $3,234
Critical access436$1,620$960 – $3,126
Ownership
For-profit267$1,707$1,001 – $5,053
Government315$1,534$878 – $2,610
Non-profit1,627$1,500$810 – $2,815
System affiliation
Part of a system1,911$1,510$832 – $2,925
Independent306$1,700$993 – $2,944

Cash price vs list price

Median list price (chargemaster)$2,735
Median cash price$1,530
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

1,593 hospitals filed a usable inpatient cash price for this code. The median is $1,551 and the average of the middle 60% is $1,637; most fall between $858 and $3,025.

Cash price percentiles, inpatient, across 1,593 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
$623$978$1,551$2,621$4,319

The most expensive tenth of hospitals charges at least 6.9× what the cheapest tenth charges ($623 vs $4,319).

Of the 1,756 hospitals that filed this code inpatient, 1,593 gave a usable cash price; 108 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 55 a list price only.

How complete is this

2,217 of the 3,956 hospitals with a price file in our corpus (56%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 2,425 hospitals that filed this code at all gave us
Usable cash price — counted2,217
Cash price carrying a plausibility flag — shown on the compare tool, excluded here139
A number the filing itself marks as not a price (a placeholder, a ratio) — excluded1
An estimate rather than a filed cash price — excluded0
A list price only, no cash figure — excluded68
Hospitals that filed this code2,425

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 Pathology family.

Hospitals file this code under descriptions such as HC Constitutional Chromosome Microarray.

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, “Chromosomal microarray with SNP analysis (CPT 81229) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-81229-chromosomal-microarray-with-snp-analysis