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Thyroxine Binding Globulin Blood Test

Connecticut 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?

$13.18

Typical negotiated rate. In Connecticut, July 2026.

Insurers have agreed to pay about $13.18 for this service. The price depends on where it is billed: about $13.18 from a physician practice, and about $25.70 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 5 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$13.18$13.18 to $14.13
FacilityA hospital or hospital-owned outpatient department$25.70$17.38 to $33.11

How much rates vary

Facilitymedian $26 · 10th to 90th $15 to $45Professionalmedian $13 · 10th to 90th $9 to $19
$10$20$50facility $26professional $13

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
$14.79
Median
$25.70
Typical High
$44.67
Aetna
Setting
Professional
Modifier
Global
Typical Low
$10.96
Median
$13.18
Typical High
$15.85
Anthem BCBS
Setting
Facility
Modifier
Global
Typical Low
$15.85
Median
$22.91
Typical High
$39.81
Anthem BCBS
Setting
Professional
Modifier
Global
Typical Low
$7.24
Median
$8.91
Typical High
$22.91
Cigna
Setting
Facility
Modifier
Global
Typical Low
$10.23
Median
$23.99
Typical High
$58.88
Cigna
Setting
Professional
Modifier
Global
Typical Low
$9.77
Median
$16.98
Typical High
$22.91
ConnectiCare
Setting
Professional
Modifier
Global
Typical Low
$6.92
Median
$14.79
Typical High
$21.88
United
Setting
Facility
Modifier
Global
Typical Low
$14.79
Median
$14.79
Typical High
$52.48
United
Setting
Professional
Modifier
Global
Typical Low
$7.41
Median
$14.79
Typical High
$25.70

Where Connecticut 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.

Connecticut· 43rd of 51

$13.18

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.