TOTAL T4 / TOTAL THYROXINE
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?
1-8 Years5.9-11.5 µg/dL
9-13 Years4.7-10.4 µg/dL
14-17 Years5.0-9.8 µg/dL
Conversion Factor: 1 µg/dL = 12.9 nmol/L
1st Trimester6.4-15.2 µg/dL
2nd Trimester7.4-15.2 µg/dL
3rd Trimester7.7-13.8 µg/dL
All Trimesters Together7.0-14.7 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.