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Rapid Single-Step Immunoassay

Maryland 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?

$7.41

Typical negotiated rate. In Maryland, July 2026.

Insurers have agreed to pay about $7.41 for this service. The price depends on where it is billed: about $7.24 from a physician practice, and about $54.95 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$7.24$7.08 to $10.96
FacilityA hospital or hospital-owned outpatient department$54.95$51.29 to $61.66

How much rates vary

Facilitymedian $55 · 10th to 90th $6 to $62Professionalmedian $7 · 10th to 90th $6 to $33
$5$10$20$50facility $55professional $7

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
$54.95
Median
$54.95
Typical High
$61.66
Aetna
Setting
Professional
Modifier
Global
Typical Low
$6.31
Median
$7.24
Typical High
$33.11
CareFirst
Setting
Professional
Modifier
Global
Typical Low
$2.95
Median
$7.76
Typical High
$9.33
Cigna
Setting
Facility
Modifier
Global
Typical Low
$5.13
Median
$6.31
Typical High
$12.59
Cigna
Setting
Professional
Modifier
Global
Typical Low
$5.13
Median
$9.33
Typical High
$23.44
Kaiser Permanente
Setting
Professional
Modifier
Global
Typical Low
$9.55
Median
$11.48
Typical High
$16.98
United
Setting
Facility
Modifier
Global
Typical Low
$4.07
Median
$4.57
Typical High
$7.41
United
Setting
Professional
Modifier
Global
Typical Low
$5.75
Median
$7.24
Typical High
$11.75
Wellpoint
Setting
Professional
Modifier
Global
Typical Low
$4.17
Median
$8.32
Typical High
$8.32

Where Maryland 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.

Maryland· 50th of 51

$7.41

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.