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

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

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 Oregon communities

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

Portland2,036,875Free T4 Levels Test – Thyroid Testing (FT4)Eugene273,904Free T4 Levels Test – Thyroid Testing (FT4)Salem268,634Free T4 Levels Test – Thyroid Testing (FT4)Medford178,457Free T4 Levels Test – Thyroid Testing (FT4)Gresham114,164Free T4 Levels Test – Thyroid Testing (FT4)Bend109,224Free T4 Levels Test – Thyroid Testing (FT4)Hillsboro105,909Free T4 Levels Test – Thyroid Testing (FT4)Beaverton97,466Free T4 Levels Test – Thyroid Testing (FT4)Albany66,405Free T4 Levels Test – Thyroid Testing (FT4)Corvallis66,090Free T4 Levels Test – Thyroid Testing (FT4)Springfield62,138Free T4 Levels Test – Thyroid Testing (FT4)Tigard54,750Free T4 Levels Test – Thyroid Testing (FT4)Aloha52,704Free T4 Levels Test – Thyroid Testing (FT4)Lake Oswego40,390Free T4 Levels Test – Thyroid Testing (FT4)Keizer39,119Free T4 Levels Test – Thyroid Testing (FT4)Grants Pass38,902Free T4 Levels Test – Thyroid Testing (FT4)Oregon City37,160Free T4 Levels Test – Thyroid Testing (FT4)McMinnville34,224Free T4 Levels Test – Thyroid Testing (FT4)Redmond33,160Free T4 Levels Test – Thyroid Testing (FT4)Bethany29,277Free T4 Levels Test – Thyroid Testing (FT4)Tualatin27,821Free T4 Levels Test – Thyroid Testing (FT4)West Linn27,173Free T4 Levels Test – Thyroid Testing (FT4)Wilsonville25,887Free T4 Levels Test – Thyroid Testing (FT4)Woodburn25,877Free T4 Levels Test – Thyroid Testing (FT4)Forest Grove25,767Free T4 Levels Test – Thyroid Testing (FT4)Newberg25,108Free T4 Levels Test – Thyroid Testing (FT4)Roseburg23,551Free T4 Levels Test – Thyroid Testing (FT4)Happy Valley23,442Free T4 Levels Test – Thyroid Testing (FT4)Hayesville21,887Free T4 Levels Test – Thyroid Testing (FT4)Klamath Falls21,710Free T4 Levels Test – Thyroid Testing (FT4)Ashland21,348Free T4 Levels Test – Thyroid Testing (FT4)Milwaukie21,108Free T4 Levels Test – Thyroid Testing (FT4)Sherwood20,281Free T4 Levels Test – Thyroid Testing (FT4)Altamont19,569Free T4 Levels Test – Thyroid Testing (FT4)Hermiston19,141Free T4 Levels Test – Thyroid Testing (FT4)Cedar Mill18,987Free T4 Levels Test – Thyroid Testing (FT4)Central Point18,948Free T4 Levels Test – Thyroid Testing (FT4)Lebanon18,150Free T4 Levels Test – Thyroid Testing (FT4)Canby18,078Free T4 Levels Test – Thyroid Testing (FT4)Oak Grove17,382Free T4 Levels Test – Thyroid Testing (FT4)Pendleton16,861Free T4 Levels Test – Thyroid Testing (FT4)Dallas16,663Free T4 Levels Test – Thyroid Testing (FT4)Four Corners16,608Free T4 Levels Test – Thyroid Testing (FT4)Troutdale16,353Free T4 Levels Test – Thyroid Testing (FT4)The Dalles15,942Free T4 Levels Test – Thyroid Testing (FT4)Coos Bay15,921Free T4 Levels Test – Thyroid Testing (FT4)St. Helens13,808Free T4 Levels Test – Thyroid Testing (FT4)La Grande13,212Free T4 Levels Test – Thyroid Testing (FT4)Oatfield12,993Free T4 Levels Test – Thyroid Testing (FT4)Cornelius12,893Free T4 Levels Test – Thyroid Testing (FT4)Sandy12,383Free T4 Levels Test – Thyroid Testing (FT4)Gladstone12,017Free T4 Levels Test – Thyroid Testing (FT4)Oak Hills11,715Free T4 Levels Test – Thyroid Testing (FT4)Santa Clara11,680Free T4 Levels Test – Thyroid Testing (FT4)Ontario11,465Free T4 Levels Test – Thyroid Testing (FT4)Damascus10,878Free T4 Levels Test – Thyroid Testing (FT4)Monmouth10,735Free T4 Levels Test – Thyroid Testing (FT4)Prineville10,611Free T4 Levels Test – Thyroid Testing (FT4)Cottage Grove10,569Free T4 Levels Test – Thyroid Testing (FT4)Fairview10,439Free T4 Levels Test – Thyroid Testing (FT4)