WHAT IS A TOTAL T4 / TOTAL THYROXINE LAB TEST?
This test measures the total amount of circulating thyroxine in your blood. Thyroxine, a hormone produced by the thyroid, is also known as T4. A high value can indicate hyperthyroidism, a low value can indicate hypothyroidism. Total T4 levels can be elevated due to pregnancy, and other high estrogen states, including use of estrogen replacement or birth control pills.
AM I REQUIRED TO FAST FOR THIS LAB TEST?
WHAT IS THE PRICE OF A TOTAL T4 / TOTAL THYROXINE LAB TEST?
*Price may vary by location – contact your local ANY LAB TEST NOW
|1-8 Years||5.9-11.5 µg/dL|
|9-13 Years||4.7-10.4 µg/dL|
|14-17 Years||5.0-9.8 µg/dL|
|Conversion Factor: 1 µg/dL = 12.9 nmol/L|
|1st Trimester||6.4-15.2 µg/dL|
|2nd Trimester||7.4-15.2 µg/dL|
|3rd Trimester||7.7-13.8 µg/dL|
|All Trimesters Together||7.0-14.7 µg/dL|
WHAT TYPE OF PHYSICIAN SHOULD I SEE IF MY LAB TEST RESULTS ARE OUT-OF-RANGE?
You should see your primary care physician or OB/GYN.