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Procedure price report · Laboratory - Chemistry and Hematology

Fetal lung maturity test, lamellar body count

CPT 83664the billing code this page is about

Counts lamellar bodies, the particles that carry lung surfactant, in amniotic fluid to assess fetal lung development.

Hospitals typically charge $64 cash for this outpatient procedure — the median across 935 hospitals that filed a usable cash price; the average of the middle 60% is $68. Most fall between $32 and $135 (20th–80th percentile).

Hospitals
935
States
49
Filings dated
Jan 2024 – 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 935 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$36$64$108$239

The most expensive tenth of hospitals charges at least 11× what the cheapest tenth charges ($21 vs $239).

How the prices are spread

$19 – $25: 78 hospitals$19$25 – $33: 69 hospitals$33 – $44: 106 hospitals$33$44 – $59: 111 hospitals$59 – $78: 171 hospitals$59$78 – $103: 115 hospitals$103 – $136: 57 hospitals$103$136 – $181: 52 hospitals$181 – $240: 45 hospitals$181$240 – $317: 44 hospitals$240median $64price bands are equal on a log scale
Hospitals per price band (848 of 935 — the bands cover the 5th to 95th percentile)
FromToHospitals
$19$2578
$25$3369
$33$44106
$44$59111
$59$78171
$78$103115
$103$13657
$136$18152
$181$24045
$240$31744

By state

The median cash price in each state, against the national median of $64.

Alaska: 1 hospital filed a usable price — fewer than 10, so no figureAKMaine: 2 hospitals filed a usable price — fewer than 10, so no figureMEVermont: 4 hospitals filed a usable price — fewer than 10, so no figureVTNew Hampshire: 1 hospital filed a usable price — fewer than 10, so no figureNHWashington: median $76 across 32 hospitalsWA$76Idaho: 2 hospitals filed a usable price — fewer than 10, so no figureIDMontana: 4 hospitals filed a usable price — fewer than 10, so no figureMTNorth Dakota: 2 hospitals filed a usable price — fewer than 10, so no figureNDMinnesota: 9 hospitals filed a usable price — fewer than 10, so no figureMNIllinois: median $76 across 51 hospitalsIL$76Wisconsin: median $94 across 50 hospitalsWI$94Michigan: median $35 across 36 hospitalsMI$35New York: median $26 across 34 hospitalsNY$26Massachusetts: 5 hospitals filed a usable price — fewer than 10, so no figureMAOregon: median $78 across 16 hospitalsOR$78Nevada: 4 hospitals filed a usable price — fewer than 10, so no figureNVWyoming: 3 hospitals filed a usable price — fewer than 10, so no figureWYSouth Dakota: no hospital in the corpus filed a usable priceSDIowa: median $64 across 23 hospitalsIA$64Indiana: median $48 across 33 hospitalsIN$48Ohio: median $63 across 59 hospitalsOH$63Pennsylvania: median $22 across 37 hospitalsPA$22New Jersey: median $21 across 33 hospitalsNJ$21Connecticut: 6 hospitals filed a usable price — fewer than 10, so no figureCTRhode Island: 3 hospitals filed a usable price — fewer than 10, so no figureRICalifornia: median $167 across 67 hospitalsCA$167Utah: median $58 across 30 hospitalsUT$58Colorado: median $115 across 29 hospitalsCO$115Nebraska: median $37 across 13 hospitalsNE$37Missouri: median $67 across 27 hospitalsMO$67Kentucky: median $58 across 27 hospitalsKY$58West Virginia: 3 hospitals filed a usable price — fewer than 10, so no figureWVVirginia: median $82 across 24 hospitalsVA$82Maryland: 6 hospitals filed a usable price — fewer than 10, so no figureMDDelaware: 2 hospitals filed a usable price — fewer than 10, so no figureDEArizona: 6 hospitals filed a usable price — fewer than 10, so no figureAZNew Mexico: 3 hospitals filed a usable price — fewer than 10, so no figureNMKansas: 4 hospitals filed a usable price — fewer than 10, so no figureKSArkansas: 8 hospitals filed a usable price — fewer than 10, so no figureARTennessee: 9 hospitals filed a usable price — fewer than 10, so no figureTNNorth Carolina: median $43 across 36 hospitalsNC$43South Carolina: 5 hospitals filed a usable price — fewer than 10, so no figureSCOklahoma: median $41 across 29 hospitalsOK$41Louisiana: median $44 across 14 hospitalsLA$44Mississippi: 8 hospitals filed a usable price — fewer than 10, so no figureMSAlabama: 7 hospitals filed a usable price — fewer than 10, so no figureALGeorgia: median $67 across 22 hospitalsGA$67Hawaii: 6 hospitals filed a usable price — fewer than 10, so no figureHITexas: median $67 across 62 hospitalsTX$67Florida: median $75 across 38 hospitalsFL$75
Cash price by state, most expensive first. National median $64. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
California CA67$167+161%$45 – $393
Colorado CO29$115+80%$57 – $428
Wisconsin WI50$94+47%$63 – $170
Virginia VA24$82+28%$45 – $172
Oregon OR16$78+22%$66 – $97
Washington WA32$76+19%$40 – $109
Illinois IL51$76+19%$28 – $201
Florida FL38$75+17%$35 – $135
Georgia GA22$67+5%$51 – $185
Texas TX62$67+5%$31 – $70
Missouri MO27$67+4%$16 – $92
Iowa IA23$640%$64 – $85
Ohio OH59$63−2%$46 – $86
Kentucky KY27$58−10%$40 – $223
Utah UT30$58−10%$58 – $68
Indiana IN33$48−25%$31 – $109
Louisiana LA14$44−32%$27 – $59
North Carolina NC36$43−33%$42 – $239
Oklahoma OK29$41−35%$34 – $63
Nebraska NE13$37−43%$29 – $83
Michigan MI36$35−45%$27 – $94
New York NY34$26−59%$19 – $68
Pennsylvania PA37$22−65%$13 – $89
New Jersey NJ33$21−67%$19 – $205
Minnesota MN9not enough hospitals filed a usable price
Tennessee TN9not enough hospitals filed a usable price
Arkansas AR8not enough hospitals filed a usable price
Mississippi MS8not enough hospitals filed a usable price
Alabama AL7not enough hospitals filed a usable price
Arizona AZ6not enough hospitals filed a usable price
Connecticut CT6not enough hospitals filed a usable price
Hawaii HI6not enough hospitals filed a usable price
Maryland MD6not enough hospitals filed a usable price
Massachusetts MA5not enough hospitals filed a usable price
South Carolina SC5not enough hospitals filed a usable price
Kansas KS4not enough hospitals filed a usable price
Montana MT4not enough hospitals filed a usable price
Nevada NV4not enough hospitals filed a usable price
Vermont VT4not enough hospitals filed a usable price
New Mexico NM3not enough hospitals filed a usable price
Rhode Island RI3not enough hospitals filed a usable price
West Virginia WV3not enough hospitals filed a usable price
Wyoming WY3not enough hospitals filed a usable price
Delaware DE2not enough hospitals filed a usable price
Idaho ID2not enough hospitals filed a usable price
Maine ME2not enough hospitals filed a usable price
North Dakota ND2not enough hospitals filed a usable price
Alaska AK1not enough hospitals filed a usable price
New Hampshire NH1not 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 $64.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care802$64$31 – $148
Children’s11fewer than 20 hospitals
Critical access116$70$43 – $99
Ownership
For-profit103$58$33 – $161
Government97$63$27 – $114
Non-profit729$64$34 – $139
System affiliation
Part of a system847$64$34 – $137
Independent88$67$29 – $133

Cash price vs list price

Median list price (chargemaster)$116
Median cash price$64
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

669 hospitals filed a usable inpatient cash price for this code. The median is $67 and the average of the middle 60% is $74; most fall between $42 and $137.

Cash price percentiles, inpatient, across 669 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
$30$47$67$115$240

The most expensive tenth of hospitals charges at least 8.0× what the cheapest tenth charges ($30 vs $240).

Of the 713 hospitals that filed this code inpatient, 669 gave a usable cash price; 20 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 24 a list price only.

How complete is this

935 of the 3,956 hospitals with a price file in our corpus (24%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 978 hospitals that filed this code at all gave us
Usable cash price — counted935
Cash price carrying a plausibility flag — shown on the compare tool, excluded here21
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 — excluded21
Hospitals that filed this code978

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 Laboratory - Chemistry and Hematology family.

Hospitals file this code under descriptions such as LAMELLAR BDY FETAL LUNG.

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, “Fetal lung maturity test, lamellar body count (CPT 83664) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-83664-fetal-lung-maturity-test-lamellar-body-count