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Thyroxine Binding Globulin Blood Test

Massachusetts 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?

$18.62

Typical negotiated rate. In Massachusetts, July 2026.

Insurers have agreed to pay about $18.62 for this service. The price depends on where it is billed: about $14.79 from a physician practice, and about $36.31 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 9 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$14.79$14.13 to $21.88
FacilityA hospital or hospital-owned outpatient department$36.31$21.38 to $47.86

How much rates vary

Facilitymedian $36 · 10th to 90th $15 to $91Professionalmedian $15 · 10th to 90th $13 to $45
$10$50$200$1Kfacility $36professional $15

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
$40.74
Typical High
$114.82
Aetna
Setting
Professional
Modifier
Global
Typical Low
$13.18
Median
$14.13
Typical High
$66.07
AllWays Health Partners
Setting
Facility
Modifier
Global
Typical Low
$13.49
Median
$20.89
Typical High
$100.00
AllWays Health Partners
Setting
Professional
Modifier
Global
Typical Low
$8.91
Median
$14.79
Typical High
$36.31
BCBS
Setting
Facility
Modifier
Global
Typical Low
$29.51
Median
$36.31
Typical High
$58.88
BCBS
Setting
Professional
Modifier
Global
Typical Low
$13.80
Median
$13.80
Typical High
$19.05
Cigna
Setting
Facility
Modifier
Global
Typical Low
$11.48
Median
$23.44
Typical High
$38.02
Cigna
Setting
Professional
Modifier
Global
Typical Low
$8.91
Median
$16.98
Typical High
$38.90
Fallon Health
Setting
Facility
Modifier
Global
Typical Low
$16.98
Median
$117.49
Typical High
$7,079.46
Fallon Health
Setting
Professional
Modifier
Global
Typical Low
$21.38
Median
$21.38
Typical High
$25.12
Harvard Pilgrim
Setting
Professional
Modifier
Global
Typical Low
$14.79
Median
$14.79
Typical High
$44.67
Health New England
Setting
Facility
Modifier
Global
Typical Low
$13.18
Median
$19.05
Typical High
$112.20
Mass General Brigham
Setting
Facility
Modifier
Global
Typical Low
$13.49
Median
$20.89
Typical High
$100.00
Mass General Brigham
Setting
Professional
Modifier
Global
Typical Low
$8.91
Median
$14.79
Typical High
$36.31
United
Setting
Facility
Modifier
Global
Typical Low
$8.91
Median
$14.79
Typical High
$23.99
United
Setting
Professional
Modifier
Global
Typical Low
$8.91
Median
$14.79
Typical High
$38.02

Where Massachusetts 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.

Massachusetts· 11th of 51

$18.62

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.