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Procedure price report · Other Laboratory

Valproic acid blood level, total

CPT 80164the billing code this page is about

A blood test that measures the total amount of valproic acid, a seizure and mood medication, in the bloodstream.

Hospitals typically charge $86 cash for this outpatient procedure — the median across 3,365 hospitals that filed a usable cash price; the average of the middle 60% is $90. Most fall between $38 and $167 (20th–80th percentile).

Hospitals
3,365
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 3,365 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
$24$46$86$146$258

The most expensive tenth of hospitals charges at least 11× what the cheapest tenth charges ($24 vs $258).

How the prices are spread

$16 – $22: 146 hospitals$16$22 – $30: 190 hospitals$30 – $41: 264 hospitals$30$41 – $57: 370 hospitals$57 – $80: 452 hospitals$57$80 – $110: 536 hospitals$110 – $153: 478 hospitals$110$153 – $211: 337 hospitals$211 – $293: 174 hospitals$211$293 – $406: 112 hospitals$293median $86price bands are equal on a log scale
Hospitals per price band (3,059 of 3,365 — the bands cover the 5th to 95th percentile)
FromToHospitals
$16$22146
$22$30190
$30$41264
$41$57370
$57$80452
$80$110536
$110$153478
$153$211337
$211$293174
$293$406112

By state

The median cash price in each state, against the national median of $86.

Alaska: median $206 across 19 hospitalsAK$206Maine: median $71 across 28 hospitalsME$71Vermont: median $95 across 14 hospitalsVT$95New Hampshire: median $86 across 25 hospitalsNH$86Washington: median $103 across 77 hospitalsWA$103Idaho: median $61 across 24 hospitalsID$61Montana: median $98 across 32 hospitalsMT$98North Dakota: median $95 across 33 hospitalsND$95Minnesota: median $68 across 105 hospitalsMN$68Illinois: median $117 across 146 hospitalsIL$117Wisconsin: median $105 across 106 hospitalsWI$105Michigan: median $70 across 101 hospitalsMI$70New York: median $61 across 107 hospitalsNY$61Massachusetts: median $92 across 52 hospitalsMA$92Oregon: median $80 across 51 hospitalsOR$80Nevada: median $95 across 22 hospitalsNV$95Wyoming: median $94 across 16 hospitalsWY$94South Dakota: median $137 across 40 hospitalsSD$137Iowa: median $80 across 88 hospitalsIA$80Indiana: median $96 across 94 hospitalsIN$96Ohio: median $60 across 140 hospitalsOH$60Pennsylvania: median $73 across 122 hospitalsPA$73New Jersey: median $16 across 57 hospitalsNJ$16Connecticut: median $51 across 23 hospitalsCT$51Rhode Island: median $77 across 10 hospitalsRI$77California: median $154 across 159 hospitalsCA$154Utah: median $72 across 41 hospitalsUT$72Colorado: median $88 across 68 hospitalsCO$88Nebraska: median $136 across 80 hospitalsNE$136Missouri: median $76 across 78 hospitalsMO$76Kentucky: median $62 across 69 hospitalsKY$62West Virginia: median $46 across 43 hospitalsWV$46Virginia: median $95 across 72 hospitalsVA$95Maryland: median $41 across 41 hospitalsMD$41Delaware: 7 hospitals filed a usable price — fewer than 10, so no figureDEArizona: median $144 across 42 hospitalsAZ$144New Mexico: median $105 across 29 hospitalsNM$105Kansas: median $95 across 89 hospitalsKS$95Arkansas: median $29 across 39 hospitalsAR$29Tennessee: median $58 across 83 hospitalsTN$58North Carolina: median $90 across 86 hospitalsNC$90South Carolina: median $103 across 53 hospitalsSC$103Oklahoma: median $73 across 73 hospitalsOK$73Louisiana: median $51 across 51 hospitalsLA$51Mississippi: median $56 across 55 hospitalsMS$56Alabama: median $61 across 42 hospitalsAL$61Georgia: median $92 across 110 hospitalsGA$92Hawaii: median $106 across 21 hospitalsHI$106Texas: median $95 across 248 hospitalsTX$95Florida: median $196 across 154 hospitalsFL$196
Cash price by state, most expensive first. National median $86. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
Alaska AK19$206+141%$153 – $282
Florida FL154$196+129%$33 – $821
California CA159$154+80%$52 – $382
Arizona AZ42$144+68%$25 – $373
South Dakota SD40$137+60%$106 – $228
Nebraska NE80$136+59%$73 – $186
Illinois IL146$117+37%$59 – $190
Hawaii HI21$106+24%$37 – $149
New Mexico NM29$105+22%$46 – $215
Wisconsin WI106$105+22%$69 – $147
Washington WA77$103+20%$63 – $142
South Carolina SC53$103+20%$71 – $155
Montana MT32$98+15%$65 – $159
Indiana IN94$96+12%$31 – $187
Kansas KS89$95+12%$65 – $131
Vermont VT14$95+11%$38 – $234
North Dakota ND33$95+11%$26 – $122
Texas TX248$95+11%$46 – $234
Virginia VA72$95+11%$42 – $187
Nevada NV22$95+11%$41 – $219
Wyoming WY16$94+10%$33 – $142
Georgia GA110$92+8%$29 – $224
Massachusetts MA52$92+7%$53 – $131
North Carolina NC86$90+5%$52 – $114
Colorado CO68$88+2%$52 – $216
New Hampshire NH25$86+1%$63 – $171
Oregon OR51$80−6%$46 – $107
Iowa IA88$80−7%$64 – $132
Rhode Island RI10$77−11%$29 – $109
Missouri MO78$76−11%$52 – $140
Pennsylvania PA122$73−14%$20 – $181
Oklahoma OK73$73−15%$38 – $125
Utah UT41$72−16%$61 – $154
Maine ME28$71−18%$35 – $148
Michigan MI101$70−18%$17 – $97
Minnesota MN105$68−20%$34 – $106
Kentucky KY69$62−28%$28 – $130
Idaho ID24$61−29%$53 – $106
New York NY107$61−29%$21 – $183
Alabama AL42$61−29%$43 – $155
Ohio OH140$60−29%$32 – $114
Tennessee TN83$58−32%$27 – $133
Mississippi MS55$56−34%$40 – $88
Louisiana LA51$51−40%$32 – $94
Connecticut CT23$51−41%$42 – $113
West Virginia WV43$46−46%$22 – $133
Maryland MD41$41−52%$32 – $49
Arkansas AR39$29−67%$18 – $98
New Jersey NJ57$16−82%$15 – $50
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 $86.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care2,305$82$34 – $184
Children’s66$117$50 – $225
Critical access984$92$47 – $149
Ownership
For-profit464$136$47 – $597
Government640$90$44 – $147
Non-profit2,251$80$36 – $150
System affiliation
Part of a system2,722$85$37 – $171
Independent643$88$42 – $146

Cash price vs list price

Median list price (chargemaster)$143
Median cash price$86
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

2,273 hospitals filed a usable inpatient cash price for this code. The median is $86 and the average of the middle 60% is $90; most fall between $40 and $167.

Cash price percentiles, inpatient, across 2,273 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
$25$46$86$145$230

The most expensive tenth of hospitals charges at least 9.1× what the cheapest tenth charges ($25 vs $230).

Of the 2,508 hospitals that filed this code inpatient, 2,273 gave a usable cash price; 123 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 112 a list price only.

How complete is this

3,365 of the 3,956 hospitals with a price file in our corpus (85%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 3,674 hospitals that filed this code at all gave us
Usable cash price — counted3,365
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 — excluded133
Hospitals that filed this code3,674

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 Other Laboratory family.

Hospitals file this code under descriptions such as HC Valproic Acid.

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, “Valproic acid blood level, total (CPT 80164) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-80164-valproic-acid-blood-level-total