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Group A Strep Antigen Test, Laboratory Immunoassay

Montana rates for HCPCS 87430

Checks a throat swab for proteins from group A streptococcus, the bacterium behind strep throat, using an instrument-read laboratory immunoassay. It is the laboratory version of the test rather than the strip read by eye during an office visit. Results generally come back the same day, so a decision about antibiotics need not wait for a culture to grow.

Rates data updated July 2026.

How much does Group A Strep Antigen Test, Laboratory Immunoassay cost?

$16.98

Typical negotiated rate. In Montana, July 2026.

Insurers have agreed to pay about $16.98 for this service. The price depends on where it is billed: about $14.13 from a physician practice, and about $22.39 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$14.13$11.22 to $22.39
FacilityA hospital or hospital-owned outpatient department$22.39$22.39 to $51.29

How much rates vary

Facilitymedian $22 · 10th to 90th $21 to $98Professionalmedian $14 · 10th to 90th $11 to $78
$10$100$1K$10K$100Kfacility $22professional $14

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
$48.98
Median
$81.28
Typical High
$229.09
Aetna
Setting
Professional
Modifier
Global
Typical Low
$11.22
Median
$13.49
Typical High
$83.18
BCBS
Setting
Facility
Modifier
Global
Typical Low
$22.39
Median
$22.39
Typical High
$104.71
BCBS
Setting
Professional
Modifier
Global
Typical Low
$22.39
Median
$22.39
Typical High
$22.39
Cigna
Setting
Facility
Modifier
Global
Typical Low
$25.12
Median
$33.11
Typical High
$95.50
Cigna
Setting
Professional
Modifier
Global
Typical Low
$8.13
Median
$19.50
Typical High
$23.99
MountainHealth Co-op
Setting
Facility
Modifier
Global
Typical Low
$16.98
Median
$21.38
Typical High
$51.29
MountainHealth Co-op
Setting
Professional
Modifier
Global
Typical Low
$16.98
Median
$21.38
Typical High
$51.29
Providence
Setting
Facility
Modifier
Global
Typical Low
$17.38
Median
$33.11
Typical High
$95.50
Providence
Setting
Professional
Modifier
Global
Typical Low
$15.14
Median
$15.14
Typical High
$20.89
United
Setting
Facility
Modifier
Global
Typical Low
$16.98
Median
$16.98
Typical High
$16.98
United
Setting
Professional
Modifier
Global
Typical Low
$6.92
Median
$7.08
Typical High
$16.60

Where Montana sits

The same service costs 4.5 times more in Wyoming than in Connecticut. 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· 31st of 51

$16.98

WY $48.98CT $10.96

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.