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Western Blot Protein Test

Illinois rates for HCPCS 84181

A laboratory test that uses a technique called a Western blot to detect a specific protein in a sample of blood or other body fluid. It is often used to confirm the results of an earlier screening test, such as one used to check for a particular infection.

Rates data updated July 2026.

How much does Western Blot Protein Test cost?

$21.88

Typical negotiated rate. In Illinois, July 2026.

Insurers have agreed to pay about $21.88 for this service. The price depends on where it is billed: about $16.98 from a physician practice, and about $28.18 from a hospital or other facility. The two figures are alternatives, not parts of one bill.

These are rates insurers have negotiated with providers, not the amount a patient is billed. What you owe depends on your plan's deductible and coinsurance. Based on rates published by 6 insurance carriers under federal price transparency rules.

Where it's billed changes the price

Billed byTypicalRange
Physician practiceA doctor's office, clinic or independent provider$16.98$13.18 to $24.55
FacilityA hospital or hospital-owned outpatient department$28.18$20.42 to $38.90

How much rates vary

Facilitymedian $28 · 10th to 90th $16 to $83Professionalmedian $17 · 10th to 90th $13 to $35
$5.0$10.0$20.0$50.0$100.0$200.0$500.0facility $28professional $17

Distribution of negotiated rates across all payers (price axis is log-scale). Each curve is scaled to its own total: facility and professional rates are different services, shown together to compare where they cluster. Need provider-level prices or 24+ months of history? Contact us.

Rates by insurance carrier

Insurance Carrier
Aetna
Setting
Facility
Modifier
Global
Typical Low
$14.45
Median
$28.18
Typical High
$54.95
Aetna
Setting
Professional
Modifier
Global
Typical Low
$13.18
Median
$14.79
Typical High
$36.31
BCBS
Setting
Facility
Modifier
Global
Typical Low
$22.91
Median
$47.86
Typical High
$151.36
BCBS
Setting
Professional
Modifier
Global
Typical Low
$11.75
Median
$18.20
Typical High
$27.54
Cigna
Setting
Facility
Modifier
Global
Typical Low
$19.05
Median
$38.90
Typical High
$79.43
Cigna
Setting
Professional
Modifier
Global
Typical Low
$16.22
Median
$21.88
Typical High
$47.86
Hally Health
Setting
Professional
Modifier
Global
Typical Low
$17.78
Median
$33.11
Typical High
$288.40
Hally Health
Setting
Facility
Modifier
Global
Typical Low
$100.00
Median
$100.00
Typical High
$100.00
Hally Health
Setting
Professional
Modifier
Global
Typical Low
$22.39
Median
$22.39
Typical High
$22.39
Molina
Setting
Professional
Modifier
Global
Typical Low
$32.36
Median
$32.36
Typical High
$33.11
United
Setting
Facility
Modifier
Global
Typical Low
$10.23
Median
$16.98
Typical High
$33.88
United
Setting
Professional
Modifier
Global
Typical Low
$7.08
Median
$10.23
Typical High
$20.42

Where Illinois sits

The same service costs 2.6 times more in South Dakota than in Maryland. Every bar is a state, most expensive first. Pick one to see its carriers and full range.

Illinois $21.88 · 14th of 51
SD $33.88MD $12.88

Median negotiated rate in each state, from every insurer that publishes one. States where no insurer publishes a rate for this service are not shown.