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Midwest · Free T4 Levels Test – Thyroid Testing (FT4)

Free T4 Levels Test – Thyroid Testing (FT4) in Minnesota

Free T4 Levels Test – Thyroid Testing (FT4) can be ordered without a referral, and this guide covers what to expect. This test measures the amount of free thyroxine (T4) in your blood to help assess thyroid function.

Typical turnaround1-3 business days
Price range$39
PreparationFollow the lab's instructions.
Sample typeBlood draw at a collection lab
ReferralNo referral required

What this test is

Free thyroxine (FT4) is a hormone produced by the thyroid gland that plays a crucial role in metabolism. This test specifically measures the unbound form of thyroxine, which is the biologically active portion available for your body's tissues to use.

What it measures

  • Free Thyroxine (FT4) — reflects the amount of active thyroid hormone available for use by the body

What the test involves

This test requires a blood sample, which is typically collected from a vein in your arm. A healthcare professional will draw the blood and place it in a collection tube.

Why it is often ordered

Clinicians often order this test to help evaluate thyroid conditions, such as an overactive thyroid (hyperthyroidism) or an underactive thyroid (hypothyroidism). It can also be used to monitor thyroid treatment.

Preparation

Follow any specific instructions provided by the laboratory before your blood draw. Some labs may ask you to fast or avoid certain medications.

How results are reported

Your results will indicate the level of free thyroxine detected in your blood sample. Reference ranges, which define what is considered typical, vary between laboratories and should be discussed with your healthcare provider.

Before you go

  • Fasting requirements
  • Medication restrictions
  • Specific preparation instructions

Cities

Free T4 Levels Test – Thyroid Testing (FT4) in Minnesota communities

Choose your city for local context and to request this test.

Minneapolis2,856,952Free T4 Levels Test – Thyroid Testing (FT4)St. Paul309,751Free T4 Levels Test – Thyroid Testing (FT4)St. Cloud123,569Free T4 Levels Test – Thyroid Testing (FT4)Rochester119,732Free T4 Levels Test – Thyroid Testing (FT4)Duluth118,975Free T4 Levels Test – Thyroid Testing (FT4)Bloomington89,436Free T4 Levels Test – Thyroid Testing (FT4)Brooklyn Park85,247Free T4 Levels Test – Thyroid Testing (FT4)Plymouth80,034Free T4 Levels Test – Thyroid Testing (FT4)Woodbury74,014Free T4 Levels Test – Thyroid Testing (FT4)Maple Grove69,900Free T4 Levels Test – Thyroid Testing (FT4)Lakeville69,026Free T4 Levels Test – Thyroid Testing (FT4)Blaine68,999Free T4 Levels Test – Thyroid Testing (FT4)Eagan68,205Free T4 Levels Test – Thyroid Testing (FT4)Eden Prairie64,048Free T4 Levels Test – Thyroid Testing (FT4)Burnsville63,926Free T4 Levels Test – Thyroid Testing (FT4)Coon Rapids63,269Free T4 Levels Test – Thyroid Testing (FT4)Apple Valley55,237Free T4 Levels Test – Thyroid Testing (FT4)Minnetonka53,809Free T4 Levels Test – Thyroid Testing (FT4)Edina53,059Free T4 Levels Test – Thyroid Testing (FT4)St. Louis Park49,539Free T4 Levels Test – Thyroid Testing (FT4)Moorhead44,129Free T4 Levels Test – Thyroid Testing (FT4)Mankato43,938Free T4 Levels Test – Thyroid Testing (FT4)Shakopee43,396Free T4 Levels Test – Thyroid Testing (FT4)Maplewood41,673Free T4 Levels Test – Thyroid Testing (FT4)Cottage Grove38,582Free T4 Levels Test – Thyroid Testing (FT4)Richfield36,899Free T4 Levels Test – Thyroid Testing (FT4)Roseville36,119Free T4 Levels Test – Thyroid Testing (FT4)Inver Grove Heights35,539Free T4 Levels Test – Thyroid Testing (FT4)Brooklyn Center33,298Free T4 Levels Test – Thyroid Testing (FT4)Andover32,471Free T4 Levels Test – Thyroid Testing (FT4)Savage32,092Free T4 Levels Test – Thyroid Testing (FT4)Fridley29,422Free T4 Levels Test – Thyroid Testing (FT4)Oakdale28,019Free T4 Levels Test – Thyroid Testing (FT4)Chaska27,461Free T4 Levels Test – Thyroid Testing (FT4)Ramsey27,409Free T4 Levels Test – Thyroid Testing (FT4)Prior Lake27,242Free T4 Levels Test – Thyroid Testing (FT4)Shoreview26,871Free T4 Levels Test – Thyroid Testing (FT4)Owatonna26,366Free T4 Levels Test – Thyroid Testing (FT4)Winona26,199Free T4 Levels Test – Thyroid Testing (FT4)Austin26,030Free T4 Levels Test – Thyroid Testing (FT4)Chanhassen25,646Free T4 Levels Test – Thyroid Testing (FT4)Rosemount25,513Free T4 Levels Test – Thyroid Testing (FT4)Elk River25,467Free T4 Levels Test – Thyroid Testing (FT4)White Bear Lake24,520Free T4 Levels Test – Thyroid Testing (FT4)Faribault24,310Free T4 Levels Test – Thyroid Testing (FT4)Champlin23,877Free T4 Levels Test – Thyroid Testing (FT4)New Brighton23,293Free T4 Levels Test – Thyroid Testing (FT4)Farmington23,253Free T4 Levels Test – Thyroid Testing (FT4)Crystal23,143Free T4 Levels Test – Thyroid Testing (FT4)Golden Valley22,247Free T4 Levels Test – Thyroid Testing (FT4)Hastings22,063Free T4 Levels Test – Thyroid Testing (FT4)New Hope21,683Free T4 Levels Test – Thyroid Testing (FT4)Columbia Heights21,612Free T4 Levels Test – Thyroid Testing (FT4)Lino Lakes21,180Free T4 Levels Test – Thyroid Testing (FT4)Willmar20,823Free T4 Levels Test – Thyroid Testing (FT4)South St. Paul20,637Free T4 Levels Test – Thyroid Testing (FT4)West St. Paul20,476Free T4 Levels Test – Thyroid Testing (FT4)Northfield20,374Free T4 Levels Test – Thyroid Testing (FT4)Forest Lake20,366Free T4 Levels Test – Thyroid Testing (FT4)Otsego19,565Free T4 Levels Test – Thyroid Testing (FT4)