endocrine

T4, total

Also known as thyroxine

Specification

Method: Automated immunoassay Antibody-based, chemiluminescent or equivalent
Validated matrices: Venous serum Standard draw
Tube: RED
CPT: 84436

Published reference ranges

Published values for T4, total vary along 2 axes:

age
pregnancy trimester

Because a single unstratified figure would misrepresent them, none is shown here.

Published values vary by sex, age, time of collection, menstrual cycle phase and analytical method. The interval applicable to a patient's result appears on that patient's report.