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Procedure price report · Laboratory - Chemistry and Hematology

Specific gravity of a body fluid other than urine

CPT 84315the billing code this page is about

A laboratory measurement of the density of a body fluid, such as spinal or joint fluid, compared with water; urine specific gravity is billed separately.

Hospitals typically charge $20 cash for this outpatient procedure — the median across 1,915 hospitals that filed a usable cash price; the average of the middle 60% is $22. Most fall between $9 and $43 (20th–80th percentile).

Hospitals
1,915
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 1,915 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
$5$10$20$36$69

The most expensive tenth of hospitals charges at least 14× what the cheapest tenth charges ($5 vs $69).

How the prices are spread

$4 – $5: 112 hospitals$4$5 – $8: 105 hospitals$8 – $11: 202 hospitals$8$11 – $16: 279 hospitals$16 – $23: 286 hospitals$16$23 – $33: 274 hospitals$33 – $47: 228 hospitals$33$47 – $68: 146 hospitals$68 – $98: 53 hospitals$68$98 – $141: 45 hospitals$98median $20price bands are equal on a log scale
Hospitals per price band (1,730 of 1,915 — the bands cover the 5th to 95th percentile)
FromToHospitals
$4$5112
$5$8105
$8$11202
$11$16279
$16$23286
$23$33274
$33$47228
$47$68146
$68$9853
$98$14145

By state

The median cash price in each state, against the national median of $20.

Alaska: 5 hospitals filed a usable price — fewer than 10, so no figureAKMaine: median $14 across 22 hospitalsME$14Vermont: 4 hospitals filed a usable price — fewer than 10, so no figureVTNew Hampshire: median $13 across 10 hospitalsNH$13Washington: median $14 across 35 hospitalsWA$14Idaho: median $20 across 18 hospitalsID$20Montana: median $24 across 13 hospitalsMT$24North Dakota: median $20 across 15 hospitalsND$20Minnesota: median $31 across 33 hospitalsMN$31Illinois: median $38 across 71 hospitalsIL$38Wisconsin: median $23 across 44 hospitalsWI$23Michigan: median $16 across 64 hospitalsMI$16New York: median $7 across 71 hospitalsNY$7Massachusetts: median $16 across 26 hospitalsMA$16Oregon: median $19 across 24 hospitalsOR$19Nevada: median $25 across 16 hospitalsNV$25Wyoming: 7 hospitals filed a usable price — fewer than 10, so no figureWYSouth Dakota: 8 hospitals filed a usable price — fewer than 10, so no figureSDIowa: median $31 across 50 hospitalsIA$31Indiana: median $10 across 63 hospitalsIN$10Ohio: median $15 across 84 hospitalsOH$15Pennsylvania: median $15 across 83 hospitalsPA$15New Jersey: median $4 across 44 hospitalsNJ$4Connecticut: median $14 across 10 hospitalsCT$14Rhode Island: 4 hospitals filed a usable price — fewer than 10, so no figureRICalifornia: median $22 across 111 hospitalsCA$22Utah: median $43 across 33 hospitalsUT$43Colorado: median $33 across 38 hospitalsCO$33Nebraska: median $21 across 30 hospitalsNE$21Missouri: median $24 across 49 hospitalsMO$24Kentucky: median $19 across 43 hospitalsKY$19West Virginia: median $15 across 19 hospitalsWV$15Virginia: median $22 across 48 hospitalsVA$22Maryland: median $12 across 25 hospitalsMD$12Delaware: 4 hospitals filed a usable price — fewer than 10, so no figureDEArizona: median $37 across 30 hospitalsAZ$37New Mexico: 9 hospitals filed a usable price — fewer than 10, so no figureNMKansas: median $19 across 32 hospitalsKS$19Arkansas: median $9 across 17 hospitalsAR$9Tennessee: median $9 across 59 hospitalsTN$9North Carolina: median $22 across 50 hospitalsNC$22South Carolina: median $37 across 19 hospitalsSC$37Oklahoma: median $14 across 51 hospitalsOK$14Louisiana: median $10 across 28 hospitalsLA$10Mississippi: median $9 across 25 hospitalsMS$9Alabama: median $25 across 32 hospitalsAL$25Georgia: median $23 across 76 hospitalsGA$23Hawaii: median $18 across 15 hospitalsHI$18Texas: median $28 across 155 hospitalsTX$28Florida: median $51 across 93 hospitalsFL$51
Cash price by state, most expensive first. National median $20. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
Florida FL93$51+156%$10 – $249
Utah UT33$43+116%$36 – $69
Illinois IL71$38+92%$20 – $58
South Carolina SC19$37+86%$16 – $49
Arizona AZ30$37+85%$8 – $161
Colorado CO38$33+66%$15 – $141
Minnesota MN33$31+56%$22 – $38
Iowa IA50$31+54%$16 – $34
Texas TX155$28+43%$13 – $80
Alabama AL32$25+26%$11 – $55
Nevada NV16$25+24%$10 – $59
Missouri MO49$24+21%$11 – $60
Montana MT13$24+21%$11 – $34
Georgia GA76$23+18%$13 – $43
Wisconsin WI44$23+18%$10 – $31
California CA111$22+13%$9 – $53
Virginia VA48$22+12%$10 – $59
North Carolina NC50$22+9%$13 – $29
Nebraska NE30$21+7%$16 – $45
North Dakota ND15$20+1%$14 – $24
Idaho ID18$200%$11 – $27
Oregon OR24$19−3%$12 – $28
Kansas KS32$19−4%$14 – $38
Kentucky KY43$19−5%$10 – $92
Hawaii HI15$18−9%$14 – $27
Massachusetts MA26$16−19%$9 – $49
Michigan MI64$16−21%$9 – $27
Ohio OH84$15−24%$11 – $25
Pennsylvania PA83$15−25%$4 – $39
West Virginia WV19$15−27%$11 – $18
Oklahoma OK51$14−29%$10 – $25
Connecticut CT10$14−29%$9 – $15
Washington WA35$14−29%$9 – $30
Maine ME22$14−31%$7 – $25
New Hampshire NH10$13−34%$11 – $49
Maryland MD25$12−42%$8 – $13
Louisiana LA28$10−48%$5 – $23
Indiana IN63$10−52%$4 – $24
Mississippi MS25$9−52%$6 – $18
Tennessee TN59$9−53%$4 – $30
Arkansas AR17$9−54%$4 – $17
New York NY71$7−64%$4 – $18
New Jersey NJ44$4−82%$3 – $55
New Mexico NM9not enough hospitals filed a usable price
South Dakota SD8not enough hospitals filed a usable price
Wyoming WY7not enough hospitals filed a usable price
Alaska AK5not enough hospitals filed a usable price
Delaware DE4not enough hospitals filed a usable price
Rhode Island RI4not enough hospitals filed a usable price
Vermont VT4not 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 $20.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care1,484$19$9 – $45
Children’s29$21$13 – $62
Critical access396$22$11 – $36
Ownership
For-profit300$30$13 – $172
Government278$21$10 – $36
Non-profit1,331$18$9 – $39
System affiliation
Part of a system1,640$20$9 – $44
Independent275$20$9 – $40

Cash price vs list price

Median list price (chargemaster)$38
Median cash price$20
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

1,319 hospitals filed a usable inpatient cash price for this code. The median is $20 and the average of the middle 60% is $21; most fall between $10 and $40.

Cash price percentiles, inpatient, across 1,319 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
$6$11$20$35$56

The most expensive tenth of hospitals charges at least 9.3× what the cheapest tenth charges ($6 vs $56).

Of the 1,471 hospitals that filed this code inpatient, 1,319 gave a usable cash price; 91 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 61 a list price only.

How complete is this

1,915 of the 3,956 hospitals with a price file in our corpus (48%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 2,099 hospitals that filed this code at all gave us
Usable cash price — counted1,915
Cash price carrying a plausibility flag — shown on the compare tool, excluded here118
A number the filing itself marks as not a price (a placeholder, a ratio) — excluded0
An estimate rather than a filed cash price — excluded0
A list price only, no cash figure — excluded66
Hospitals that filed this code2,099

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 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 Specific Gravity-Fluid.

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, “Specific gravity of a body fluid other than urine (CPT 84315) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-84315-specific-gravity-of-a-body-fluid-other-than-urine