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Rapid Single-Step Immunoassay

Massachusetts 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?

$10.72

Typical negotiated rate. In Massachusetts, July 2026.

Insurers have agreed to pay about $10.72 for this service. The price depends on where it is billed: about $9.55 from a physician practice, and about $20.42 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 8 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$9.55$8.91 to $13.49
FacilityA hospital or hospital-owned outpatient department$20.42$12.59 to $27.54

How much rates vary

Facilitymedian $20 · 10th to 90th $9 to $37Professionalmedian $10 · 10th to 90th $7 to $25
$10$50$200$1Kfacility $20professional $10

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
$7.24
Median
$20.42
Typical High
$40.74
Aetna
Setting
Professional
Modifier
Global
Typical Low
$7.24
Median
$8.71
Typical High
$33.88
AllWays Health Partners
Setting
Facility
Modifier
Global
Typical Low
$7.76
Median
$12.02
Typical High
$72.44
AllWays Health Partners
Setting
Professional
Modifier
Global
Typical Low
$6.46
Median
$9.55
Typical High
$23.44
BCBS
Setting
Facility
Modifier
Global
Typical Low
$16.60
Median
$20.89
Typical High
$31.62
BCBS
Setting
Professional
Modifier
Global
Typical Low
$9.12
Median
$9.12
Typical High
$9.77
Cigna
Setting
Facility
Modifier
Global
Typical Low
$6.76
Median
$13.49
Typical High
$21.88
Cigna
Setting
Professional
Modifier
Global
Typical Low
$5.89
Median
$11.22
Typical High
$16.98
Fallon Health
Setting
Facility
Modifier
Global
Typical Low
$9.77
Median
$12.88
Typical High
$4,897.79
Fallon Health
Setting
Professional
Modifier
Global
Typical Low
$10.72
Median
$12.59
Typical High
$16.60
Harvard Pilgrim
Setting
Professional
Modifier
Global
Typical Low
$9.55
Median
$9.55
Typical High
$23.44
Mass General Brigham
Setting
Facility
Modifier
Global
Typical Low
$7.76
Median
$12.02
Typical High
$72.44
Mass General Brigham
Setting
Professional
Modifier
Global
Typical Low
$6.46
Median
$9.55
Typical High
$23.44
United
Setting
Facility
Modifier
Global
Typical Low
$4.90
Median
$9.55
Typical High
$12.30
United
Setting
Professional
Modifier
Global
Typical Low
$5.75
Median
$9.55
Typical High
$23.99

Where Massachusetts 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.

Massachusetts· 19th of 51

$10.72

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.