T4 Free (FT4)
Fasting Required: No

Specimen: Blood

Results: 2-3 business days

Description: Thyroxine T4 (Free) This test is used to evaluate thyroid function in individuals who may have protein abnormalities that could affect total T4 levels. It is used to evaluate thyroid function and monitor replacement and suppressive therapy.

Methodology: Immunoassay (IA)

Alternative Name(s): FT4, Thyroxine (T4) Free

Note: Result turnaround times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.