go back

Thyroxine Binding Globulin Blood Test

Washington, DC 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?

$10.96

Typical negotiated rate. In Washington, DC, July 2026.

Insurers have agreed to pay about $10.96 for this service. The price depends on where it is billed: about $10.96 from a physician practice, and about $54.95 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$10.96$10.96 to $10.96
FacilityA hospital or hospital-owned outpatient department$54.95$10.96 to $91.20

How much rates vary

Facilitymedian $55 · 10th to 90th $11 to $102Professionalmedian $11 · 10th to 90th $11 to $51
$10$20$50$100facility $55professional $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
$10.96
Median
$91.20
Typical High
$102.33
Aetna
Setting
Professional
Modifier
Global
Typical Low
$10.96
Median
$10.96
Typical High
$10.96
CareFirst
Setting
Professional
Modifier
Global
Typical Low
$41.69
Median
$74.13
Typical High
$165.96
Cigna
Setting
Facility
Modifier
Global
Typical Low
$23.99
Median
$25.12
Typical High
$56.23
Cigna
Setting
Professional
Modifier
Global
Typical Low
$7.94
Median
$16.98
Typical High
$114.82
Kaiser Permanente
Setting
Professional
Modifier
Global
Typical Low
$28.84
Median
$28.84
Typical High
$30.20
United
Setting
Facility
Modifier
Global
Typical Low
$8.71
Median
$17.78
Typical High
$51.29
United
Setting
Professional
Modifier
Global
Typical Low
$6.17
Median
$9.33
Typical High
$25.12

Where Washington, DC 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.

Washington, DC· 51st of 51

$10.96

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.