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CSTB Known Family Variant Test

South Carolina rates for HCPCS 81190

A blood test that checks for one specific change in the CSTB gene that has already been identified in the family. Changes in this gene cause an inherited epilepsy that begins in adolescence with sudden muscle jerks and seizures. Only the family's known change is looked for.

Rates data updated October 2026.

How much does CSTB Known Family Variant Test cost?

$182

Typical negotiated rate. In South Carolina, October 2026.

Insurers have agreed to pay about $182 for this service. The price depends on where it is billed: about $182 from a physician practice, and about $389 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 5 insurance carriers under federal price transparency rules.

Prices by location type

Billed byTypicalRange
Physician practiceA doctor's office, clinic or independent provider$182$126 to $186
FacilityA hospital or hospital-owned outpatient department$389$195 to $851

How much rates vary

Facilitymedian $389 · 10th to 90th $145 to $1,148Professionalmedian $182 · 10th to 90th $87 to $224
$100$200$500$1Kfacility $389professional $182

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
$144.54
Median
$144.54
Typical High
$144.54
Aetna
Setting
Professional
Modifier
None
Typical Low
$144.54
Median
$144.54
Typical High
$147.91
BCBS South Carolina
Setting
Facility
Modifier
None
Typical Low
$1,000.00
Median
$1,000.00
Typical High
$1,023.29
BCBS South Carolina
Setting
Professional
Modifier
None
Typical Low
$181.97
Median
$186.21
Typical High
$257.04
Cigna
Setting
Facility
Modifier
None
Typical Low
$346.74
Median
$467.74
Typical High
$1,148.15
Cigna
Setting
Professional
Modifier
None
Typical Low
$83.18
Median
$87.10
Typical High
$223.87
Medcost
Setting
Facility
Modifier
None
Typical Low
$144.54
Median
$173.78
Typical High
$537.03
Medcost
Setting
Professional
Modifier
None
Typical Low
$186.21
Median
$186.21
Typical High
$257.04
United
Setting
Facility
Modifier
None
Typical Low
$165.96
Median
$165.96
Typical High
$223.87
United
Setting
Professional
Modifier
None
Typical Low
$77.62
Median
$112.20
Typical High
$186.21
3 more rates with less common billing modifiers

A modifier changes what was billed, for example a reduced or repeated service. Each of these modifiers carries under 10% of the published rates for this code. Modifier combinations, and modifiers with fewer than 30 rates for a carrier, are not listed.

Insurance Carrier
Aetna
Setting
Professional
Modifier
52 · Reduced service
Typical Low
$72.44
Median
$72.44
Typical High
$74.13
Aetna
Setting
Professional
Modifier
53 · Discontinued
Typical Low
$28.84
Median
$28.84
Typical High
$29.51
Medcost
Setting
Professional
Modifier
51 · Multiple procedures
Typical Low
$93.33
Median
$93.33
Typical High
$147.91

Where South Carolina sits

The same service costs 4.2 times more in Texas than in Delaware. 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 Carolina· 26th of 51

$182

TX $468DE $112

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.