go back

CSTB Known Family Variant Test

Tennessee 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?

$186

Typical negotiated rate. In Tennessee, October 2026.

Insurers have agreed to pay about $186 for this service. Most negotiated rates run $112 to $380.

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.

How much rates vary

Facilitymedian $347 · 10th to 90th $123 to $447Professionalmedian $166 · 10th to 90th $85 to $1,380
$50$100$200$500$1Kfacility $347professional $166

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

Rates by insurance carrier

Insurance Carrier
Aetna
Setting
Facility
Modifier
None
Typical Low
$138.04
Median
$147.91
Typical High
$281.84
Aetna
Setting
Professional
Modifier
None
Typical Low
$138.04
Median
$147.91
Typical High
$186.21
Aetna
Setting
Professional
Modifier
52 · Reduced service
Typical Low
$69.18
Median
$72.44
Typical High
$107.15
Aetna
Setting
Professional
Modifier
53 · Discontinued
Typical Low
$27.54
Median
$29.51
Typical High
$42.66
BCBS Tennessee
Setting
Professional
Modifier
None
Typical Low
$95.50
Median
$186.21
Typical High
$186.21
Cigna
Setting
Facility
Modifier
None
Typical Low
$123.03
Median
$380.19
Typical High
$446.68
Cigna
Setting
Professional
Modifier
None
Typical Low
$83.18
Median
$102.33
Typical High
$309.03
Lucent Health
Setting
Professional
Modifier
None
Typical Low
$933.25
Median
$1,380.38
Typical High
$1,380.38
United
Setting
Professional
Modifier
None
Typical Low
$77.62
Median
$112.20
Typical High
$186.21

Where Tennessee 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.

Tennessee· 25th of 51

$186

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.