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

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

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 Hawaii communities

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

Honolulu835,291Free T4 Levels Test – Thyroid Testing (FT4)Kailua106,260Free T4 Levels Test – Thyroid Testing (FT4)East Honolulu50,076Free T4 Levels Test – Thyroid Testing (FT4)Hilo46,559Free T4 Levels Test – Thyroid Testing (FT4)Pearl City45,941Free T4 Levels Test – Thyroid Testing (FT4)Waipahu39,927Free T4 Levels Test – Thyroid Testing (FT4)Kaneohe34,509Free T4 Levels Test – Thyroid Testing (FT4)Ewa Gentry28,125Free T4 Levels Test – Thyroid Testing (FT4)Mililani Town27,974Free T4 Levels Test – Thyroid Testing (FT4)Kahului27,938Free T4 Levels Test – Thyroid Testing (FT4)Kapolei23,248Free T4 Levels Test – Thyroid Testing (FT4)Kihei22,840Free T4 Levels Test – Thyroid Testing (FT4)Mililani Mauka21,657Free T4 Levels Test – Thyroid Testing (FT4)Makakilo20,862Free T4 Levels Test – Thyroid Testing (FT4)Schofield Barracks18,255Free T4 Levels Test – Thyroid Testing (FT4)Wahiawa17,357Free T4 Levels Test – Thyroid Testing (FT4)Ocean Pointe16,676Free T4 Levels Test – Thyroid Testing (FT4)Wailuku15,670Free T4 Levels Test – Thyroid Testing (FT4)Halawa14,990Free T4 Levels Test – Thyroid Testing (FT4)Ewa Beach14,614Free T4 Levels Test – Thyroid Testing (FT4)Royal Kunia14,390Free T4 Levels Test – Thyroid Testing (FT4)Waianae14,152Free T4 Levels Test – Thyroid Testing (FT4)Waimalu13,818Free T4 Levels Test – Thyroid Testing (FT4)Lahaina13,261Free T4 Levels Test – Thyroid Testing (FT4)Maili13,245Free T4 Levels Test – Thyroid Testing (FT4)Nanakuli12,587Free T4 Levels Test – Thyroid Testing (FT4)Hawaiian Paradise Park11,942Free T4 Levels Test – Thyroid Testing (FT4)Kapaa11,516Free T4 Levels Test – Thyroid Testing (FT4)Waihee-Waiehu11,059Free T4 Levels Test – Thyroid Testing (FT4)Waipio10,989Free T4 Levels Test – Thyroid Testing (FT4)Waimea10,422Free T4 Levels Test – Thyroid Testing (FT4)Hickam Housing10,022Free T4 Levels Test – Thyroid Testing (FT4)Makaha9,710Free T4 Levels Test – Thyroid Testing (FT4)Aiea9,527Free T4 Levels Test – Thyroid Testing (FT4)Haiku-Pauwela9,347Free T4 Levels Test – Thyroid Testing (FT4)Ahuimanu8,943Free T4 Levels Test – Thyroid Testing (FT4)Lihue8,371Free T4 Levels Test – Thyroid Testing (FT4)Makawao7,670Free T4 Levels Test – Thyroid Testing (FT4)Waikoloa Village7,519Free T4 Levels Test – Thyroid Testing (FT4)Kula7,495Free T4 Levels Test – Thyroid Testing (FT4)Waikele7,495Free T4 Levels Test – Thyroid Testing (FT4)Pukalani7,315Free T4 Levels Test – Thyroid Testing (FT4)Kahaluu-Keauhou7,236Free T4 Levels Test – Thyroid Testing (FT4)Napili-Honokowai6,762Free T4 Levels Test – Thyroid Testing (FT4)Ewa Villages6,657Free T4 Levels Test – Thyroid Testing (FT4)Wailua Homesteads6,634Free T4 Levels Test – Thyroid Testing (FT4)Wailea6,546Free T4 Levels Test – Thyroid Testing (FT4)Laie6,436Free T4 Levels Test – Thyroid Testing (FT4)West Loch Estate6,239Free T4 Levels Test – Thyroid Testing (FT4)Iroquois Point5,737Free T4 Levels Test – Thyroid Testing (FT4)Waipio Acres5,618Free T4 Levels Test – Thyroid Testing (FT4)Waimanalo5,371Free T4 Levels Test – Thyroid Testing (FT4)Kahaluu5,006Free T4 Levels Test – Thyroid Testing (FT4)Heeia4,777Free T4 Levels Test – Thyroid Testing (FT4)Kalaheo4,776Free T4 Levels Test – Thyroid Testing (FT4)Haleiwa4,651Free T4 Levels Test – Thyroid Testing (FT4)Hanamaulu4,435Free T4 Levels Test – Thyroid Testing (FT4)Pupukea4,416Free T4 Levels Test – Thyroid Testing (FT4)Waimanalo Beach4,389Free T4 Levels Test – Thyroid Testing (FT4)Hawaiian Beaches4,213Free T4 Levels Test – Thyroid Testing (FT4)