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Thyroxine Binding Globulin Blood Test

Illinois rates for HCPCS 84442

A blood test that measures the level of thyroxine binding globulin, a protein made by the liver that carries thyroid hormone through the bloodstream. It helps doctors interpret thyroid hormone levels correctly, since changes in this carrier protein — from pregnancy, liver disease, certain medications, or inherited conditions — can make total thyroid hormone results look abnormal even when thyroid function itself is normal. A small blood sample is all that's needed.

Rates data updated July 2026.

How much does Thyroxine Binding Globulin Blood Test cost?

$14.79

Typical negotiated rate. In Illinois, July 2026.

Insurers have agreed to pay about $14.79 for this service. The price depends on where it is billed: about $11.48 from a physician practice, and about $24.55 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 7 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$11.48$10.23 to $15.14
FacilityA hospital or hospital-owned outpatient department$24.55$15.49 to $33.88

How much rates vary

Facilitymedian $25 · 10th to 90th $13 to $60Professionalmedian $11 · 10th to 90th $3 to $30
$5$10$20$50$100facility $25professional $11

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
$12.02
Median
$23.44
Typical High
$40.74
Aetna
Setting
Professional
Modifier
Global
Typical Low
$11.48
Median
$12.59
Typical High
$30.20
Ambetter
Setting
Professional
Modifier
Global
Typical Low
$7.41
Median
$7.41
Typical High
$7.41
BCBS
Setting
Facility
Modifier
Global
Typical Low
$19.50
Median
$38.90
Typical High
$151.36
BCBS
Setting
Professional
Modifier
Global
Typical Low
$3.47
Median
$10.23
Typical High
$11.48
Cigna
Setting
Facility
Modifier
Global
Typical Low
$16.60
Median
$34.67
Typical High
$69.18
Cigna
Setting
Professional
Modifier
Global
Typical Low
$7.76
Median
$16.98
Typical High
$26.92
Hally Health
Setting
Professional
Modifier
Global
Typical Low
$16.22
Median
$28.84
Typical High
$181.97
Hally Health
Setting
Facility
Modifier
Global
Typical Low
$100.00
Median
$100.00
Typical High
$100.00
Hally Health
Setting
Professional
Modifier
Global
Typical Low
$19.05
Median
$19.05
Typical High
$19.05
Molina
Setting
Professional
Modifier
Global
Typical Low
$8.13
Median
$8.13
Typical High
$18.62
United
Setting
Facility
Modifier
Global
Typical Low
$10.96
Median
$14.79
Typical High
$29.51
United
Setting
Professional
Modifier
Global
Typical Low
$6.17
Median
$10.96
Typical High
$15.85

Where Illinois sits

The same service costs 2.6 times more in Nebraska 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.

Illinois· 34th of 51

$14.79

NE $28.18DC $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.