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Rapid Single-Step Immunoassay

Montana 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?

$12.02

Typical negotiated rate. In Montana, July 2026.

Insurers have agreed to pay about $12.02 for this service. The price depends on where it is billed: about $10.96 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 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$10.96$5.75 to $16.98
FacilityA hospital or hospital-owned outpatient department$15.14$12.02 to $28.18

How much rates vary

Facilitymedian $15 · 10th to 90th $12 to $65Professionalmedian $11 · 10th to 90th $4 to $63
$10$100$1K$10K$100Kfacility $15professional $11

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
Professional
Modifier
Global
Typical Low
$4.47
Median
$10.96
Typical High
$63.10
BCBS
Setting
Facility
Modifier
Global
Typical Low
$33.88
Median
$64,565.42
Typical High
$91,201.08
BCBS
Setting
Professional
Modifier
Global
Typical Low
$12.88
Median
$12.88
Typical High
$12.88
Cigna
Setting
Facility
Modifier
Global
Typical Low
$14.45
Median
$18.62
Typical High
$54.95
Cigna
Setting
Professional
Modifier
Global
Typical Low
$5.75
Median
$11.22
Typical High
$13.80
MountainHealth Co-op
Setting
Facility
Modifier
Global
Typical Low
$9.55
Median
$12.88
Typical High
$29.51
MountainHealth Co-op
Setting
Professional
Modifier
Global
Typical Low
$9.55
Median
$12.88
Typical High
$29.51
Providence
Setting
Facility
Modifier
Global
Typical Low
$12.30
Median
$18.62
Typical High
$54.95
Providence
Setting
Professional
Modifier
Global
Typical Low
$8.71
Median
$8.71
Typical High
$12.02
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
$6.92
Typical High
$11.75

Where Montana 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.

Montana· 9th of 51

$12.02

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.