STD Booking Find and request a lab test

Mountain West · Free T4 Levels Test – Thyroid Testing (FT4)

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

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 Colorado communities

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

Denver2,650,725Free T4 Levels Test – Thyroid Testing (FT4)Colorado Springs628,808Free T4 Levels Test – Thyroid Testing (FT4)Aurora383,496Free T4 Levels Test – Thyroid Testing (FT4)Fort Collins301,596Free T4 Levels Test – Thyroid Testing (FT4)Lakewood155,608Free T4 Levels Test – Thyroid Testing (FT4)Pueblo142,727Free T4 Levels Test – Thyroid Testing (FT4)Thornton140,538Free T4 Levels Test – Thyroid Testing (FT4)Greeley135,270Free T4 Levels Test – Thyroid Testing (FT4)Grand Junction134,074Free T4 Levels Test – Thyroid Testing (FT4)Arvada122,903Free T4 Levels Test – Thyroid Testing (FT4)Boulder120,818Free T4 Levels Test – Thyroid Testing (FT4)Westminster115,535Free T4 Levels Test – Thyroid Testing (FT4)Centennial107,972Free T4 Levels Test – Thyroid Testing (FT4)Longmont104,035Free T4 Levels Test – Thyroid Testing (FT4)Highlands Ranch103,238Free T4 Levels Test – Thyroid Testing (FT4)Lafayette99,475Free T4 Levels Test – Thyroid Testing (FT4)Loveland75,938Free T4 Levels Test – Thyroid Testing (FT4)Broomfield72,697Free T4 Levels Test – Thyroid Testing (FT4)Castle Rock71,037Free T4 Levels Test – Thyroid Testing (FT4)Commerce City61,516Free T4 Levels Test – Thyroid Testing (FT4)Parker57,311Free T4 Levels Test – Thyroid Testing (FT4)Littleton45,465Free T4 Levels Test – Thyroid Testing (FT4)Security-Widefield40,158Free T4 Levels Test – Thyroid Testing (FT4)Brighton39,895Free T4 Levels Test – Thyroid Testing (FT4)Northglenn37,899Free T4 Levels Test – Thyroid Testing (FT4)Dakota Ridge34,361Free T4 Levels Test – Thyroid Testing (FT4)Ken Caryl33,889Free T4 Levels Test – Thyroid Testing (FT4)Englewood33,500Free T4 Levels Test – Thyroid Testing (FT4)Pueblo West32,991Free T4 Levels Test – Thyroid Testing (FT4)Wheat Ridge32,340Free T4 Levels Test – Thyroid Testing (FT4)Windsor31,972Free T4 Levels Test – Thyroid Testing (FT4)Fountain29,495Free T4 Levels Test – Thyroid Testing (FT4)Erie29,367Free T4 Levels Test – Thyroid Testing (FT4)Columbine25,924Free T4 Levels Test – Thyroid Testing (FT4)Evans21,727Free T4 Levels Test – Thyroid Testing (FT4)Four Square Mile21,723Free T4 Levels Test – Thyroid Testing (FT4)Louisville21,091Free T4 Levels Test – Thyroid Testing (FT4)Clifton20,122Free T4 Levels Test – Thyroid Testing (FT4)Montrose20,098Free T4 Levels Test – Thyroid Testing (FT4)Sherrelwood20,069Free T4 Levels Test – Thyroid Testing (FT4)Golden20,041Free T4 Levels Test – Thyroid Testing (FT4)Durango18,953Free T4 Levels Test – Thyroid Testing (FT4)Cimarron Hills18,619Free T4 Levels Test – Thyroid Testing (FT4)Cañon City17,157Free T4 Levels Test – Thyroid Testing (FT4)Fort Carson16,743Free T4 Levels Test – Thyroid Testing (FT4)Johnstown16,596Free T4 Levels Test – Thyroid Testing (FT4)Welby16,260Free T4 Levels Test – Thyroid Testing (FT4)Firestone15,949Free T4 Levels Test – Thyroid Testing (FT4)Greenwood Village15,548Free T4 Levels Test – Thyroid Testing (FT4)Black Forest14,375Free T4 Levels Test – Thyroid Testing (FT4)Frederick14,127Free T4 Levels Test – Thyroid Testing (FT4)Federal Heights14,111Free T4 Levels Test – Thyroid Testing (FT4)Sterling13,976Free T4 Levels Test – Thyroid Testing (FT4)Lone Tree13,701Free T4 Levels Test – Thyroid Testing (FT4)Fruita13,296Free T4 Levels Test – Thyroid Testing (FT4)Superior13,283Free T4 Levels Test – Thyroid Testing (FT4)Steamboat Springs13,193Free T4 Levels Test – Thyroid Testing (FT4)Fort Morgan11,483Free T4 Levels Test – Thyroid Testing (FT4)Cherry Creek11,389Free T4 Levels Test – Thyroid Testing (FT4)Castle Pines11,296Free T4 Levels Test – Thyroid Testing (FT4)