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

Free T4 Levels Test – Thyroid Testing (FT4) in South Carolina

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 South Carolina communities

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

Charleston685,517Free T4 Levels Test – Thyroid Testing (FT4)Columbia640,502Free T4 Levels Test – Thyroid Testing (FT4)Greenville450,487Free T4 Levels Test – Thyroid Testing (FT4)Myrtle Beach281,180Free T4 Levels Test – Thyroid Testing (FT4)Spartanburg216,021Free T4 Levels Test – Thyroid Testing (FT4)Mauldin149,687Free T4 Levels Test – Thyroid Testing (FT4)Rock Hill115,292Free T4 Levels Test – Thyroid Testing (FT4)North Charleston114,542Free T4 Levels Test – Thyroid Testing (FT4)Mount Pleasant88,900Free T4 Levels Test – Thyroid Testing (FT4)Florence88,709Free T4 Levels Test – Thyroid Testing (FT4)Anderson80,657Free T4 Levels Test – Thyroid Testing (FT4)Sumter77,626Free T4 Levels Test – Thyroid Testing (FT4)Hilton Head Island74,248Free T4 Levels Test – Thyroid Testing (FT4)Summerville50,318Free T4 Levels Test – Thyroid Testing (FT4)Goose Creek44,502Free T4 Levels Test – Thyroid Testing (FT4)Greer35,151Free T4 Levels Test – Thyroid Testing (FT4)Aiken31,516Free T4 Levels Test – Thyroid Testing (FT4)Bluffton27,596Free T4 Levels Test – Thyroid Testing (FT4)Socastee24,657Free T4 Levels Test – Thyroid Testing (FT4)Carolina Forest24,642Free T4 Levels Test – Thyroid Testing (FT4)Fort Mill24,069Free T4 Levels Test – Thyroid Testing (FT4)North Augusta24,013Free T4 Levels Test – Thyroid Testing (FT4)Taylors23,348Free T4 Levels Test – Thyroid Testing (FT4)Simpsonville23,190Free T4 Levels Test – Thyroid Testing (FT4)Lexington23,068Free T4 Levels Test – Thyroid Testing (FT4)Easley22,643Free T4 Levels Test – Thyroid Testing (FT4)Greenwood22,363Free T4 Levels Test – Thyroid Testing (FT4)Conway22,001Free T4 Levels Test – Thyroid Testing (FT4)St. Andrews21,383Free T4 Levels Test – Thyroid Testing (FT4)Wade Hampton20,879Free T4 Levels Test – Thyroid Testing (FT4)Hanahan20,381Free T4 Levels Test – Thyroid Testing (FT4)Five Forks19,158Free T4 Levels Test – Thyroid Testing (FT4)North Myrtle Beach18,502Free T4 Levels Test – Thyroid Testing (FT4)West Columbia17,265Free T4 Levels Test – Thyroid Testing (FT4)Clemson17,238Free T4 Levels Test – Thyroid Testing (FT4)Red Hill16,060Free T4 Levels Test – Thyroid Testing (FT4)Berea15,892Free T4 Levels Test – Thyroid Testing (FT4)Seven Oaks15,561Free T4 Levels Test – Thyroid Testing (FT4)Dentsville15,245Free T4 Levels Test – Thyroid Testing (FT4)Gantt14,790Free T4 Levels Test – Thyroid Testing (FT4)Ladson14,711Free T4 Levels Test – Thyroid Testing (FT4)Cayce13,637Free T4 Levels Test – Thyroid Testing (FT4)Lake Wylie13,560Free T4 Levels Test – Thyroid Testing (FT4)Parker13,019Free T4 Levels Test – Thyroid Testing (FT4)Beaufort12,899Free T4 Levels Test – Thyroid Testing (FT4)Orangeburg12,779Free T4 Levels Test – Thyroid Testing (FT4)Port Royal12,734Free T4 Levels Test – Thyroid Testing (FT4)Moncks Corner12,685Free T4 Levels Test – Thyroid Testing (FT4)Gaffney12,560Free T4 Levels Test – Thyroid Testing (FT4)Tega Cay12,336Free T4 Levels Test – Thyroid Testing (FT4)Oak Grove11,803Free T4 Levels Test – Thyroid Testing (FT4)James Island11,618Free T4 Levels Test – Thyroid Testing (FT4)Irmo11,581Free T4 Levels Test – Thyroid Testing (FT4)Forest Acres10,621Free T4 Levels Test – Thyroid Testing (FT4)Garden City10,600Free T4 Levels Test – Thyroid Testing (FT4)Boiling Springs10,591Free T4 Levels Test – Thyroid Testing (FT4)Newberry10,496Free T4 Levels Test – Thyroid Testing (FT4)Fountain Inn10,237Free T4 Levels Test – Thyroid Testing (FT4)Red Bank10,070Free T4 Levels Test – Thyroid Testing (FT4)Little River9,929Free T4 Levels Test – Thyroid Testing (FT4)