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Procedure price report · Laboratory - Chemistry and Hematology

Thiopurine methyltransferase enzyme test

CPT 84433the billing code this page is about

A laboratory test that measures the activity of the thiopurine S-methyltransferase enzyme, which affects how the body processes certain medications.

Hospitals typically charge $133 cash for this outpatient procedure — the median across 1,701 hospitals that filed a usable cash price; the average of the middle 60% is $150. Most fall between $60 and $299 (20th–80th percentile).

Hospitals
1,701
States
50
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 1,701 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
$31$69$133$266$426

The most expensive tenth of hospitals charges at least 14× what the cheapest tenth charges ($31 vs $426).

How the prices are spread

$22 – $31: 101 hospitals$22$31 – $43: 73 hospitals$43 – $60: 88 hospitals$43$60 – $84: 188 hospitals$84 – $117: 237 hospitals$84$117 – $163: 215 hospitals$163 – $227: 222 hospitals$163$227 – $317: 194 hospitals$317 – $442: 149 hospitals$317$442 – $616: 73 hospitals$442median $133price bands are equal on a log scale
Hospitals per price band (1,540 of 1,701 — the bands cover the 5th to 95th percentile)
FromToHospitals
$22$31101
$31$4373
$43$6088
$60$84188
$84$117237
$117$163215
$163$227222
$227$317194
$317$442149
$442$61673

By state

The median cash price in each state, against the national median of $133.

Alaska: median $390 across 11 hospitalsAK$390Maine: median $134 across 11 hospitalsME$134Vermont: 5 hospitals filed a usable price — fewer than 10, so no figureVTNew Hampshire: median $105 across 16 hospitalsNH$105Washington: median $94 across 44 hospitalsWA$94Idaho: median $222 across 14 hospitalsID$222Montana: 7 hospitals filed a usable price — fewer than 10, so no figureMTNorth Dakota: median $110 across 20 hospitalsND$110Minnesota: median $140 across 80 hospitalsMN$140Illinois: median $163 across 59 hospitalsIL$163Wisconsin: median $185 across 77 hospitalsWI$185Michigan: median $107 across 43 hospitalsMI$107New York: median $49 across 56 hospitalsNY$49Massachusetts: median $132 across 38 hospitalsMA$132Oregon: median $123 across 34 hospitalsOR$123Nevada: median $92 across 10 hospitalsNV$92Wyoming: 6 hospitals filed a usable price — fewer than 10, so no figureWYSouth Dakota: median $334 across 11 hospitalsSD$334Iowa: median $168 across 41 hospitalsIA$168Indiana: median $110 across 52 hospitalsIN$110Ohio: median $99 across 75 hospitalsOH$99Pennsylvania: median $126 across 55 hospitalsPA$126New Jersey: median $24 across 41 hospitalsNJ$24Connecticut: median $69 across 12 hospitalsCT$69Rhode Island: 5 hospitals filed a usable price — fewer than 10, so no figureRICalifornia: median $88 across 61 hospitalsCA$88Utah: median $357 across 29 hospitalsUT$357Colorado: median $159 across 35 hospitalsCO$159Nebraska: median $241 across 32 hospitalsNE$241Missouri: median $223 across 50 hospitalsMO$223Kentucky: median $293 across 25 hospitalsKY$293West Virginia: median $100 across 22 hospitalsWV$100Virginia: median $169 across 39 hospitalsVA$169Maryland: median $130 across 21 hospitalsMD$130Delaware: 5 hospitals filed a usable price — fewer than 10, so no figureDEArizona: median $63 across 24 hospitalsAZ$63New Mexico: median $31 across 12 hospitalsNM$31Kansas: median $301 across 25 hospitalsKS$301Arkansas: median $46 across 21 hospitalsAR$46Tennessee: median $65 across 40 hospitalsTN$65North Carolina: median $146 across 63 hospitalsNC$146South Carolina: median $210 across 33 hospitalsSC$210Oklahoma: median $162 across 39 hospitalsOK$162Louisiana: median $75 across 29 hospitalsLA$75Mississippi: median $78 across 29 hospitalsMS$78Alabama: median $89 across 12 hospitalsAL$89Georgia: median $206 across 63 hospitalsGA$206Hawaii: 4 hospitals filed a usable price — fewer than 10, so no figureHITexas: median $128 across 86 hospitalsTX$128Florida: median $133 across 79 hospitalsFL$133
Cash price by state, most expensive first. National median $133. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
Alaska AK11$390+194%$250 – $616
Utah UT29$357+169%$322 – $420
South Dakota SD11$334+152%$198 – $755
Kansas KS25$301+127%$67 – $468
Kentucky KY25$293+121%$86 – $448
Nebraska NE32$241+82%$104 – $506
Missouri MO50$223+68%$83 – $301
Idaho ID14$222+68%$171 – $357
South Carolina SC33$210+58%$126 – $210
Georgia GA63$206+55%$95 – $504
Wisconsin WI77$185+40%$88 – $288
Virginia VA39$169+27%$38 – $323
Iowa IA41$168+27%$64 – $360
Illinois IL59$163+23%$64 – $281
Oklahoma OK39$162+22%$48 – $238
Colorado CO35$159+20%$42 – $288
North Carolina NC63$146+10%$105 – $271
Minnesota MN80$140+6%$47 – $272
Maine ME11$134+1%$58 – $236
Florida FL79$1330%$73 – $195
Massachusetts MA38$1320%$50 – $316
Maryland MD21$130−2%$107 – $345
Texas TX86$128−4%$98 – $562
Pennsylvania PA55$126−5%$19 – $519
Oregon OR34$123−7%$67 – $267
North Dakota ND20$110−17%$39 – $233
Indiana IN52$110−17%$30 – $198
Michigan MI43$107−19%$81 – $299
New Hampshire NH16$105−21%$93 – $571
West Virginia WV22$100−25%$100 – $216
Ohio OH75$99−25%$86 – $270
Washington WA44$94−29%$48 – $243
Nevada NV10$92−31%$24 – $142
Alabama AL12$89−33%$51 – $480
California CA61$88−34%$69 – $116
Mississippi MS29$78−42%$18 – $263
Louisiana LA29$75−43%$39 – $265
Connecticut CT12$69−48%$65 – $104
Tennessee TN40$65−51%$12 – $97
Arizona AZ24$63−53%$22 – $227
New York NY56$49−63%$22 – $205
Arkansas AR21$46−66%$15 – $235
New Mexico NM12$31−77%$30 – $37
New Jersey NJ41$24−82%$22 – $111
Montana MT7not enough hospitals filed a usable price
Wyoming WY6not enough hospitals filed a usable price
Delaware DE5not enough hospitals filed a usable price
Rhode Island RI5not enough hospitals filed a usable price
Vermont VT5not enough hospitals filed a usable price
Hawaii HI4not 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 $133.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care1,281$122$54 – $281
Children’s29$225$75 – $398
Critical access384$171$76 – $326
Ownership
For-profit185$195$83 – $581
Government254$148$60 – $326
Non-profit1,255$123$55 – $278
System affiliation
Part of a system1,469$128$60 – $290
Independent232$185$61 – $322

Cash price vs list price

Median list price (chargemaster)$220
Median cash price$133
Cash as a share of list, median hospital63%

At the typical hospital, asking for the cash price cuts the list price by about 37%. 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

1,191 hospitals filed a usable inpatient cash price for this code. The median is $128 and the average of the middle 60% is $141; most fall between $62 and $279.

Cash price percentiles, inpatient, across 1,191 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
$37$69$128$238$357

The most expensive tenth of hospitals charges at least 9.6× what the cheapest tenth charges ($37 vs $357).

Of the 1,312 hospitals that filed this code inpatient, 1,191 gave a usable cash price; 76 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 45 a list price only.

How complete is this

1,701 of the 3,956 hospitals with a price file in our corpus (43%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 1,848 hospitals that filed this code at all gave us
Usable cash price — counted1,701
Cash price carrying a plausibility flag — shown on the compare tool, excluded here95
A number the filing itself marks as not a price (a placeholder, a ratio) — excluded1
An estimate rather than a filed cash price — excluded1
A list price only, no cash figure — excluded50
Hospitals that filed this code1,848

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 Hc Assay Thiopurine S-Methyltransferase.

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, “Thiopurine methyltransferase enzyme test (CPT 84433) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-84433-thiopurine-methyltransferase-enzyme-test