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Procedure price report · Pathology

Spinal muscular atrophy gene test for a known family variant

CPT 81337the billing code this page is about

Laboratory test of the SMN1 gene that looks only for a specific spinal muscular atrophy change already identified in a blood relative.

Hospitals typically charge $305 cash for this outpatient procedure — the median across 169 hospitals that filed a usable cash price; the average of the middle 60% is $302. Most fall between $185 and $469 (20th–80th percentile).

Hospitals
169
States
26
Filings dated
Dec 2025 – 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 169 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
$164$185$305$426$887

The most expensive tenth of hospitals charges at least 5.4× what the cheapest tenth charges ($164 vs $887).

How the prices are spread

$64 – $84: 3 hospitals$64$84 – $110: 0 hospitals$110 – $144: 4 hospitals$110$144 – $189: 36 hospitals$189 – $248: 24 hospitals$189$248 – $325: 19 hospitals$325 – $427: 33 hospitals$325$427 – $559: 13 hospitals$559 – $733: 4 hospitals$559$733 – $961: 19 hospitals$733median $305price bands are equal on a log scale
Hospitals per price band (155 of 169 — the bands cover the 5th to 95th percentile)
FromToHospitals
$64$843
$84$1100
$110$1444
$144$18936
$189$24824
$248$32519
$325$42733
$427$55913
$559$7334
$733$96119

By state

The median cash price in each state, against the national median of $305.

Alaska: no hospital in the corpus filed a usable priceAKMaine: no hospital in the corpus filed a usable priceMEVermont: no hospital in the corpus filed a usable priceVTNew Hampshire: no hospital in the corpus filed a usable priceNHWashington: 2 hospitals filed a usable price — fewer than 10, so no figureWAIdaho: no hospital in the corpus filed a usable priceIDMontana: no hospital in the corpus filed a usable priceMTNorth Dakota: no hospital in the corpus filed a usable priceNDMinnesota: no hospital in the corpus filed a usable priceMNIllinois: 4 hospitals filed a usable price — fewer than 10, so no figureILWisconsin: no hospital in the corpus filed a usable priceWIMichigan: median $442 across 12 hospitalsMI$442New York: median $185 across 15 hospitalsNY$185Massachusetts: 3 hospitals filed a usable price — fewer than 10, so no figureMAOregon: no hospital in the corpus filed a usable priceORNevada: 1 hospital filed a usable price — fewer than 10, so no figureNVWyoming: no hospital in the corpus filed a usable priceWYSouth Dakota: no hospital in the corpus filed a usable priceSDIowa: median $178 across 11 hospitalsIA$178Indiana: median $234 across 13 hospitalsIN$234Ohio: median $887 across 19 hospitalsOH$887Pennsylvania: median $55 across 10 hospitalsPA$55New Jersey: median $204 across 23 hospitalsNJ$204Connecticut: no hospital in the corpus filed a usable priceCTRhode Island: no hospital in the corpus filed a usable priceRICalifornia: median $426 across 21 hospitalsCA$426Utah: no hospital in the corpus filed a usable priceUTColorado: no hospital in the corpus filed a usable priceCONebraska: no hospital in the corpus filed a usable priceNEMissouri: 1 hospital filed a usable price — fewer than 10, so no figureMOKentucky: 8 hospitals filed a usable price — fewer than 10, so no figureKYWest Virginia: 2 hospitals filed a usable price — fewer than 10, so no figureWVVirginia: 4 hospitals filed a usable price — fewer than 10, so no figureVAMaryland: no hospital in the corpus filed a usable priceMDDelaware: 1 hospital filed a usable price — fewer than 10, so no figureDEArizona: 1 hospital filed a usable price — fewer than 10, so no figureAZNew Mexico: no hospital in the corpus filed a usable priceNMKansas: 1 hospital filed a usable price — fewer than 10, so no figureKSArkansas: no hospital in the corpus filed a usable priceARTennessee: 1 hospital filed a usable price — fewer than 10, so no figureTNNorth Carolina: no hospital in the corpus filed a usable priceNCSouth Carolina: 1 hospital filed a usable price — fewer than 10, so no figureSCOklahoma: 2 hospitals filed a usable price — fewer than 10, so no figureOKLouisiana: 1 hospital filed a usable price — fewer than 10, so no figureLAMississippi: 1 hospital filed a usable price — fewer than 10, so no figureMSAlabama: no hospital in the corpus filed a usable priceALGeorgia: 9 hospitals filed a usable price — fewer than 10, so no figureGAHawaii: no hospital in the corpus filed a usable priceHITexas: no hospital in the corpus filed a usable priceTXFlorida: 2 hospitals filed a usable price — fewer than 10, so no figureFL
Cash price by state, most expensive first. National median $305. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
Ohio OH19$887+191%$775 – $1,193
Michigan MI12$442+45%$256 – $442
California CA21$426+40%$426 – $426
Indiana IN13$234−23%$205 – $332
New Jersey NJ23$204−33%$185 – $204
New York NY15$185−39%$185 – $185
Iowa IA11$178−42%$178 – $178
Pennsylvania PA10$55−82%$52 – $64
Georgia GA9not enough hospitals filed a usable price
Kentucky KY8not enough hospitals filed a usable price
Illinois IL4not enough hospitals filed a usable price
Virginia VA4not enough hospitals filed a usable price
Massachusetts MA3not enough hospitals filed a usable price
Florida FL2not enough hospitals filed a usable price
Oklahoma OK2not enough hospitals filed a usable price
Washington WA2not enough hospitals filed a usable price
West Virginia WV2not enough hospitals filed a usable price
Arizona AZ1not enough hospitals filed a usable price
Delaware DE1not enough hospitals filed a usable price
Kansas KS1not enough hospitals filed a usable price
Louisiana LA1not enough hospitals filed a usable price
Missouri MO1not enough hospitals filed a usable price
Mississippi MS1not enough hospitals filed a usable price
Nevada NV1not enough hospitals filed a usable price
South Carolina SC1not enough hospitals filed a usable price
Tennessee TN1not 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 $305.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care144$256$185 – $497
Children’s5fewer than 20 hospitals
Critical access18fewer than 20 hospitals
Ownership
For-profit8fewer than 20 hospitals
Government21$185$185 – $379
Non-profit138$305$185 – $442
System affiliation
Part of a system156$305$185 – $442
Independent13fewer than 20 hospitals

Cash price vs list price

Median list price (chargemaster)$760
Median cash price$305
Cash as a share of list, median hospital56%

At the typical hospital, asking for the cash price cuts the list price by about 44%. 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

100 hospitals filed a usable inpatient cash price for this code. The median is $426 and the average of the middle 60% is $355; most fall between $178 and $556.

Cash price percentiles, inpatient, across 100 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
$113$178$426$442$887

The most expensive tenth of hospitals charges at least 7.8× what the cheapest tenth charges ($113 vs $887).

Of the 100 hospitals that filed this code inpatient, 100 gave a usable cash price; 0 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 0 a list price only.

How complete is this

169 of the 3,956 hospitals with a price file in our corpus (4%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 172 hospitals that filed this code at all gave us
Usable cash price — counted169
Cash price carrying a plausibility flag — shown on the compare tool, excluded here1
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 — excluded1
Hospitals that filed this code172

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 5, 2026 and September 24, 2026; the figures were computed September 25, 2026 from filings loaded through September 23, 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 SMN1 GEN NOWN FAMIL SEQ VRNT.

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, “Spinal muscular atrophy gene test for a known family variant (CPT 81337) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-81337-spinal-muscular-atrophy-gene-test-for-a-known-family-variant