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?

No.

WHAT IS THE PRICE OF A TOTAL T4 / TOTAL THYROXINE LAB TEST? 

$49.00

 

TEST DETAILS:

Reference Range(s):

Pediatric

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

Adult4.8-10.4 µg/dL

Pregnancy

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.