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Group A Strep Antigen Test, Laboratory Immunoassay

South Dakota 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 October 2026.

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

$19.50

Typical negotiated rate. In South Dakota, October 2026.

Insurers have agreed to pay about $19.50 for this service. The price depends on where it is billed: about $18.20 from a physician practice, and about $32.36 from a hospital or other facility.

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.

Prices by location type

Billed byTypicalRange
Physician practiceA doctor's office, clinic or independent provider$18.20$11.22 to $32.36
FacilityA hospital or hospital-owned outpatient department$32.36$19.05 to $105

How much rates vary

Facilitymedian $32 · 10th to 90th $19 to $240Professionalmedian $18 · 10th to 90th $8 to $41
$10$20$50$100$200facility $32professional $18

Distribution of negotiated rates across all payers (price axis is log-scale). Small sample; interpret with caution. Need provider-level prices or 24+ months of history? Contact us.

Rates by insurance carrier

Insurance Carrier
Aetna
Setting
Facility
Modifier
None
Typical Low
$104.71
Median
$104.71
Typical High
$239.88
Aetna
Setting
Professional
Modifier
None
Typical Low
$11.22
Median
$11.22
Typical High
$18.20
Cigna
Setting
Facility
Modifier
None
Typical Low
$32.36
Median
$32.36
Typical High
$32.36
Cigna
Setting
Professional
Modifier
None
Typical Low
$19.50
Median
$32.36
Typical High
$40.74
Medica
Setting
Facility
Modifier
None
Typical Low
$16.22
Median
$19.05
Typical High
$45.71
Medica
Setting
Professional
Modifier
None
Typical Low
$8.32
Median
$15.14
Typical High
$19.95
Sanford Health Plan
Setting
Professional
Modifier
None
Typical Low
$25.12
Median
$34.67
Typical High
$45.71
United
Setting
Professional
Modifier
None
Typical Low
$7.08
Median
$10.00
Typical High
$16.98
Wellmark
Setting
Professional
Modifier
None
Typical Low
$16.98
Median
$16.98
Typical High
$16.98

Where South Dakota sits

The same service costs 3.6 times more in Alaska than in Alabama. 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.

South Dakota· 14th of 51

$19.50

AK $38.02AL $10.47

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.