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Procedure price report · Laboratory - Chemistry and Hematology

Magnesium blood test

CPT 83735the billing code this page is about

A blood test that measures the level of magnesium, a mineral involved in nerve, muscle and heart function.

Hospitals typically charge $36 cash for this outpatient procedure — the median across 3,426 hospitals that filed a usable cash price; the average of the middle 60% is $40. Most fall between $13 and $80 (20th–80th percentile).

Hospitals
3,426
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 3,426 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
$8$16$36$69$119

The most expensive tenth of hospitals charges at least 15× what the cheapest tenth charges ($8 vs $119).

How the prices are spread

$6 – $8: 209 hospitals$6$8 – $11: 193 hospitals$11 – $16: 286 hospitals$11$16 – $23: 337 hospitals$23 – $32: 346 hospitals$23$32 – $46: 434 hospitals$46 – $65: 524 hospitals$46$65 – $92: 404 hospitals$92 – $130: 244 hospitals$92$130 – $184: 112 hospitals$130median $36price bands are equal on a log scale
Hospitals per price band (3,089 of 3,426 — the bands cover the 5th to 95th percentile)
FromToHospitals
$6$8209
$8$11193
$11$16286
$16$23337
$23$32346
$32$46434
$46$65524
$65$92404
$92$130244
$130$184112

By state

The median cash price in each state, against the national median of $36.

Alaska: median $54 across 19 hospitalsAK$54Maine: median $42 across 28 hospitalsME$42Vermont: median $49 across 14 hospitalsVT$49New Hampshire: median $46 across 25 hospitalsNH$46Washington: median $49 across 77 hospitalsWA$49Idaho: median $29 across 25 hospitalsID$29Montana: median $49 across 34 hospitalsMT$49North Dakota: median $40 across 33 hospitalsND$40Minnesota: median $40 across 107 hospitalsMN$40Illinois: median $58 across 145 hospitalsIL$58Wisconsin: median $49 across 108 hospitalsWI$49Michigan: median $20 across 102 hospitalsMI$20New York: median $22 across 119 hospitalsNY$22Massachusetts: median $38 across 54 hospitalsMA$38Oregon: median $30 across 51 hospitalsOR$30Nevada: median $50 across 22 hospitalsNV$50Wyoming: median $39 across 16 hospitalsWY$39South Dakota: median $81 across 41 hospitalsSD$81Iowa: median $48 across 90 hospitalsIA$48Indiana: median $37 across 96 hospitalsIN$37Ohio: median $34 across 142 hospitalsOH$34Pennsylvania: median $32 across 122 hospitalsPA$32New Jersey: median $8 across 57 hospitalsNJ$8Connecticut: median $31 across 23 hospitalsCT$31Rhode Island: median $49 across 10 hospitalsRI$49California: median $34 across 158 hospitalsCA$34Utah: median $46 across 43 hospitalsUT$46Colorado: median $39 across 72 hospitalsCO$39Nebraska: median $72 across 84 hospitalsNE$72Missouri: median $44 across 78 hospitalsMO$44Kentucky: median $43 across 69 hospitalsKY$43West Virginia: median $13 across 44 hospitalsWV$13Virginia: median $49 across 73 hospitalsVA$49Maryland: median $16 across 41 hospitalsMD$16Delaware: 7 hospitals filed a usable price — fewer than 10, so no figureDEArizona: median $51 across 42 hospitalsAZ$51New Mexico: median $67 across 29 hospitalsNM$67Kansas: median $41 across 96 hospitalsKS$41Arkansas: median $18 across 40 hospitalsAR$18Tennessee: median $20 across 83 hospitalsTN$20North Carolina: median $36 across 91 hospitalsNC$36South Carolina: median $51 across 53 hospitalsSC$51Oklahoma: median $41 across 73 hospitalsOK$41Louisiana: median $25 across 53 hospitalsLA$25Mississippi: median $16 across 54 hospitalsMS$16Alabama: median $32 across 44 hospitalsAL$32Georgia: median $43 across 112 hospitalsGA$43Hawaii: median $61 across 21 hospitalsHI$61Texas: median $46 across 251 hospitalsTX$46Florida: median $13 across 155 hospitalsFL$13
Cash price by state, most expensive first. National median $36. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
South Dakota SD41$81+122%$37 – $116
Nebraska NE84$72+98%$33 – $105
New Mexico NM29$67+83%$35 – $91
Hawaii HI21$61+68%$13 – $68
Illinois IL145$58+58%$25 – $101
Alaska AK19$54+49%$9 – $114
Arizona AZ42$51+41%$9 – $295
South Carolina SC53$51+41%$24 – $82
Nevada NV22$50+37%$21 – $137
Vermont VT14$49+36%$18 – $110
Montana MT34$49+35%$23 – $66
Washington WA77$49+35%$30 – $75
Virginia VA73$49+35%$11 – $79
Wisconsin WI108$49+34%$22 – $58
Rhode Island RI10$49+33%$15 – $53
Iowa IA90$48+33%$32 – $70
Texas TX251$46+26%$16 – $144
Utah UT43$46+26%$39 – $81
New Hampshire NH25$46+25%$19 – $85
Missouri MO78$44+20%$24 – $79
Kentucky KY69$43+18%$11 – $84
Georgia GA112$43+17%$14 – $75
Maine ME28$42+16%$30 – $77
Oklahoma OK73$41+13%$17 – $64
Kansas KS96$41+13%$24 – $68
North Dakota ND33$40+10%$9 – $56
Minnesota MN107$40+9%$16 – $66
Wyoming WY16$39+8%$13 – $73
Colorado CO72$39+6%$18 – $60
Massachusetts MA54$38+5%$25 – $80
Indiana IN96$37+1%$16 – $73
North Carolina NC91$36−2%$15 – $71
California CA158$34−6%$6 – $139
Ohio OH142$34−8%$19 – $55
Pennsylvania PA122$32−11%$10 – $79
Alabama AL44$32−11%$8 – $74
Connecticut CT23$31−15%$18 – $42
Oregon OR51$30−18%$14 – $64
Idaho ID25$29−22%$20 – $67
Louisiana LA53$25−31%$8 – $56
New York NY119$22−40%$9 – $67
Michigan MI102$20−45%$8 – $39
Tennessee TN83$20−46%$8 – $55
Arkansas AR40$18−50%$14 – $36
Maryland MD41$16−55%$13 – $20
Mississippi MS54$16−57%$6 – $45
Florida FL155$13−64%$6 – $145
West Virginia WV44$13−64%$10 – $49
New Jersey NJ57$8−79%$7 – $23
Delaware DE7not 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 $36.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care2,341$31$11 – $80
Children’s67$45$17 – $70
Critical access1,008$47$21 – $80
Ownership
For-profit479$51$12 – $200
Government654$40$15 – $74
Non-profit2,283$34$13 – $72
System affiliation
Part of a system2,762$37$13 – $82
Independent664$36$16 – $71

Cash price vs list price

Median list price (chargemaster)$60
Median cash price$36
Cash as a share of list, median hospital65%

At the typical hospital, asking for the cash price cuts the list price by about 35%. 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

2,312 hospitals filed a usable inpatient cash price for this code. The median is $36 and the average of the middle 60% is $39; most fall between $14 and $79.

Cash price percentiles, inpatient, across 2,312 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
$8$16$36$68$115

The most expensive tenth of hospitals charges at least 14× what the cheapest tenth charges ($8 vs $115).

Of the 2,552 hospitals that filed this code inpatient, 2,312 gave a usable cash price; 126 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 114 a list price only.

How complete is this

3,426 of the 3,956 hospitals with a price file in our corpus (87%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 3,741 hospitals that filed this code at all gave us
Usable cash price — counted3,426
Cash price carrying a plausibility flag — shown on the compare tool, excluded here175
A number the filing itself marks as not a price (a placeholder, a ratio) — excluded0
An estimate rather than a filed cash price — excluded1
A list price only, no cash figure — excluded139
Hospitals that filed this code3,741

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 Laboratory - Chemistry and Hematology family.

Hospitals file this code under descriptions such as HC Magnesium-Urine.

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, “Magnesium blood test (CPT 83735) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-83735-magnesium-blood-test