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Procedure price report · Other Laboratory

Rheumatoid factor blood test, amount measured

CPT 86431the billing code this page is about

Blood test that measures how much rheumatoid factor is in the blood, reported as a number.

Hospitals typically charge $39 cash for this outpatient procedure — the median across 3,297 hospitals that filed a usable cash price; the average of the middle 60% is $42. Most fall between $14 and $78 (20th–80th percentile).

Hospitals
3,297
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 3,297 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
$9$19$39$70$119

The most expensive tenth of hospitals charges at least 13× what the cheapest tenth charges ($9 vs $119).

How the prices are spread

$6 – $9: 152 hospitals$6$9 – $12: 225 hospitals$12 – $17: 232 hospitals$12$17 – $24: 308 hospitals$24 – $34: 437 hospitals$24$34 – $48: 420 hospitals$48 – $68: 481 hospitals$48$68 – $96: 435 hospitals$96 – $135: 184 hospitals$96$135 – $190: 101 hospitals$135median $39price bands are equal on a log scale
Hospitals per price band (2,975 of 3,297 — the bands cover the 5th to 95th percentile)
FromToHospitals
$6$9152
$9$12225
$12$17232
$17$24308
$24$34437
$34$48420
$48$68481
$68$96435
$96$135184
$135$190101

By state

The median cash price in each state, against the national median of $39.

Alaska: median $50 across 19 hospitalsAK$50Maine: median $32 across 28 hospitalsME$32Vermont: median $60 across 13 hospitalsVT$60New Hampshire: median $47 across 25 hospitalsNH$47Washington: median $39 across 74 hospitalsWA$39Idaho: median $30 across 23 hospitalsID$30Montana: median $52 across 31 hospitalsMT$52North Dakota: median $40 across 33 hospitalsND$40Minnesota: median $46 across 104 hospitalsMN$46Illinois: median $65 across 136 hospitalsIL$65Wisconsin: median $55 across 104 hospitalsWI$55Michigan: median $25 across 96 hospitalsMI$25New York: median $21 across 106 hospitalsNY$21Massachusetts: median $40 across 49 hospitalsMA$40Oregon: median $35 across 50 hospitalsOR$35Nevada: median $46 across 21 hospitalsNV$46Wyoming: median $44 across 16 hospitalsWY$44South Dakota: median $91 across 41 hospitalsSD$91Iowa: median $49 across 88 hospitalsIA$49Indiana: median $32 across 95 hospitalsIN$32Ohio: median $33 across 141 hospitalsOH$33Pennsylvania: median $29 across 122 hospitalsPA$29New Jersey: median $7 across 56 hospitalsNJ$7Connecticut: median $33 across 22 hospitalsCT$33Rhode Island: median $35 across 10 hospitalsRI$35California: median $14 across 151 hospitalsCA$14Utah: median $65 across 42 hospitalsUT$65Colorado: median $50 across 71 hospitalsCO$50Nebraska: median $57 across 79 hospitalsNE$57Missouri: median $36 across 76 hospitalsMO$36Kentucky: median $46 across 69 hospitalsKY$46West Virginia: median $32 across 41 hospitalsWV$32Virginia: median $36 across 71 hospitalsVA$36Maryland: median $26 across 40 hospitalsMD$26Delaware: 7 hospitals filed a usable price — fewer than 10, so no figureDEArizona: median $23 across 39 hospitalsAZ$23New Mexico: median $69 across 29 hospitalsNM$69Kansas: median $44 across 90 hospitalsKS$44Arkansas: median $11 across 39 hospitalsAR$11Tennessee: median $28 across 81 hospitalsTN$28North Carolina: median $43 across 87 hospitalsNC$43South Carolina: median $67 across 52 hospitalsSC$67Oklahoma: median $30 across 72 hospitalsOK$30Louisiana: median $27 across 51 hospitalsLA$27Mississippi: median $32 across 55 hospitalsMS$32Alabama: median $46 across 41 hospitalsAL$46Georgia: median $62 across 104 hospitalsGA$62Hawaii: median $34 across 21 hospitalsHI$34Texas: median $44 across 243 hospitalsTX$44Florida: median $25 across 143 hospitalsFL$25
Cash price by state, most expensive first. National median $39. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
South Dakota SD41$91+134%$49 – $129
New Mexico NM29$69+77%$29 – $104
South Carolina SC52$67+71%$32 – $69
Illinois IL136$65+67%$26 – $120
Utah UT42$65+66%$63 – $76
Georgia GA104$62+60%$19 – $93
Vermont VT13$60+54%$24 – $109
Nebraska NE79$57+45%$32 – $84
Wisconsin WI104$55+41%$29 – $61
Montana MT31$52+34%$27 – $80
Alaska AK19$50+29%$12 – $130
Colorado CO71$50+28%$32 – $91
Iowa IA88$49+25%$33 – $70
New Hampshire NH25$47+21%$18 – $83
Kentucky KY69$46+19%$20 – $91
Minnesota MN104$46+19%$20 – $63
Alabama AL41$46+18%$14 – $91
Nevada NV21$46+17%$18 – $101
Kansas KS90$44+14%$30 – $68
Wyoming WY16$44+13%$15 – $69
Texas TX243$44+12%$14 – $131
North Carolina NC87$43+9%$11 – $74
Massachusetts MA49$40+3%$20 – $85
North Dakota ND33$40+2%$11 – $59
Washington WA74$390%$25 – $72
Missouri MO76$36−7%$20 – $87
Virginia VA71$36−8%$10 – $68
Oregon OR50$35−10%$17 – $62
Rhode Island RI10$35−10%$21 – $45
Hawaii HI21$34−13%$19 – $58
Ohio OH141$33−15%$14 – $63
Connecticut CT22$33−15%$21 – $47
West Virginia WV41$32−17%$13 – $62
Maine ME28$32−17%$19 – $68
Indiana IN95$32−18%$13 – $71
Mississippi MS55$32−19%$10 – $51
Idaho ID23$30−23%$12 – $93
Oklahoma OK72$30−24%$17 – $51
Pennsylvania PA122$29−25%$10 – $74
Tennessee TN81$28−28%$12 – $54
Louisiana LA51$27−30%$13 – $52
Maryland MD40$26−32%$21 – $33
Michigan MI96$25−35%$9 – $54
Florida FL143$25−37%$12 – $88
Arizona AZ39$23−41%$8 – $185
New York NY106$21−47%$8 – $77
California CA151$14−65%$5 – $76
Arkansas AR39$11−71%$4 – $63
New Jersey NJ56$7−83%$6 – $73
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 $39.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care2,261$33$13 – $77
Children’s62$53$23 – $116
Critical access964$48$22 – $82
Ownership
For-profit459$47$14 – $184
Government620$44$19 – $75
Non-profit2,208$36$14 – $74
System affiliation
Part of a system2,682$38$14 – $78
Independent615$41$18 – $78

Cash price vs list price

Median list price (chargemaster)$64
Median cash price$39
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

2,225 hospitals filed a usable inpatient cash price for this code. The median is $38 and the average of the middle 60% is $41; most fall between $15 and $75.

Cash price percentiles, inpatient, across 2,225 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
$10$20$38$69$108

The most expensive tenth of hospitals charges at least 11× what the cheapest tenth charges ($10 vs $108).

Of the 2,450 hospitals that filed this code inpatient, 2,225 gave a usable cash price; 115 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 110 a list price only.

How complete is this

3,297 of the 3,956 hospitals with a price file in our corpus (83%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 3,589 hospitals that filed this code at all gave us
Usable cash price — counted3,297
Cash price carrying a plausibility flag — shown on the compare tool, excluded here157
A number the filing itself marks as not a price (a placeholder, a ratio) — excluded0
An estimate rather than a filed cash price — excluded2
A list price only, no cash figure — excluded133
Hospitals that filed this code3,589

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 Other Laboratory family.

Hospitals file this code under descriptions such as HC Rheumatoid Factor:Quant.

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, “Rheumatoid factor blood test, amount measured (CPT 86431) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-86431-rheumatoid-factor-blood-test-amount-measured