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Rapid Single-Step Immunoassay

Connecticut 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?

$7.59

Typical negotiated rate. In Connecticut, July 2026.

Insurers have agreed to pay about $7.59 for this service. The price depends on where it is billed: about $7.59 from a physician practice, and about $15.14 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 5 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$7.59$7.24 to $7.59
FacilityA hospital or hospital-owned outpatient department$15.14$10.00 to $21.38

How much rates vary

Facilitymedian $15 · 10th to 90th $10 to $27Professionalmedian $8 · 10th to 90th $4 to $12
$5$10$20facility $15professional $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
$9.55
Median
$13.80
Typical High
$28.84
Aetna
Setting
Professional
Modifier
Global
Typical Low
$4.37
Median
$7.59
Typical High
$10.23
Anthem BCBS
Setting
Facility
Modifier
Global
Typical Low
$10.00
Median
$15.14
Typical High
$26.30
Anthem BCBS
Setting
Professional
Modifier
Global
Typical Low
$4.17
Median
$5.89
Typical High
$13.18
Cigna
Setting
Facility
Modifier
Global
Typical Low
$6.31
Median
$15.49
Typical High
$38.02
Cigna
Setting
Professional
Modifier
Global
Typical Low
$8.32
Median
$11.22
Typical High
$15.14
ConnectiCare
Setting
Professional
Modifier
Global
Typical Low
$4.57
Median
$9.55
Typical High
$12.88
United
Setting
Facility
Modifier
Global
Typical Low
$9.55
Median
$9.55
Typical High
$9.55
United
Setting
Professional
Modifier
Global
Typical Low
$5.75
Median
$9.55
Typical High
$16.98

Where Connecticut 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.

Connecticut· 48th of 51

$7.59

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.