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Rapid Single-Step Immunoassay

Illinois rates for HCPCS 83518

A quick laboratory test that uses antibodies fixed on a strip or cartridge to detect a substance in a sample. The result appears in one step, as a line or color change, giving a yes-or-no or rough-level answer rather than an exact measurement. What is being looked for depends on what the doctor ordered.

Rates data updated July 2026.

How much does Rapid Single-Step Immunoassay cost?

$9.55

Typical negotiated rate. In Illinois, July 2026.

Insurers have agreed to pay about $9.55 for this service. The price depends on where it is billed: about $8.32 from a physician practice, and about $15.85 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$8.32$6.61 to $9.77
FacilityA hospital or hospital-owned outpatient department$15.85$9.77 to $19.95

How much rates vary

Facilitymedian $16 · 10th to 90th $8 to $48Professionalmedian $8 · 10th to 90th $3 to $20
$5$10$20$50$100facility $16professional $8

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
$7.94
Median
$15.49
Typical High
$28.84
Aetna
Setting
Professional
Modifier
Global
Typical Low
$4.79
Median
$8.13
Typical High
$19.95
BCBS
Setting
Facility
Modifier
Global
Typical Low
$12.30
Median
$50.12
Typical High
$158.49
BCBS
Setting
Professional
Modifier
Global
Typical Low
$3.47
Median
$7.41
Typical High
$9.55
Cigna
Setting
Facility
Modifier
Global
Typical Low
$9.55
Median
$20.89
Typical High
$44.67
Cigna
Setting
Professional
Modifier
Global
Typical Low
$5.89
Median
$11.22
Typical High
$17.78
Hally Health
Setting
Professional
Modifier
Global
Typical Low
$10.72
Median
$17.38
Typical High
$66.07
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
$12.59
Median
$12.59
Typical High
$12.59
Molina
Setting
Professional
Modifier
Global
Typical Low
$5.25
Median
$6.76
Typical High
$12.02
United
Setting
Facility
Modifier
Global
Typical Low
$6.76
Median
$9.55
Typical High
$19.50
United
Setting
Professional
Modifier
Global
Typical Low
$5.75
Median
$7.41
Typical High
$11.75

Where Illinois sits

The same service costs 2.6 times more in South Dakota than in Washington, DC. Every bar is a state, most expensive first. Touch or drag across it to read any state, then open that state for its carriers and full range.

Illinois· 26th of 51

$9.55

SD $18.62DC $7.24

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.