T4FT4 - Overview: T4 (Thyroxine), Total and Free

Test Catalog

Test Name

Test ID: T4FT4    
T4 (Thyroxine), Total and Free

Useful For Suggests clinical disorders or settings where the test may be helpful

Thyroxine (T4) and free T4 are measured together with thyroid-stimulating hormone when thyroid function disorders are suspected.

Profile Information A profile is a group of laboratory tests that are ordered and performed together under a single Mayo Test ID. Profile information lists the test performed, inclusive of the test fee, when a profile is ordered and includes reporting names and individual availability.

Test IDReporting NameAvailable SeparatelyAlways Performed
T4FT4 (Thyroxine), Free, SNoYes
T4CCT4 (Thyroxine), Total Only, SNoYes

Method Name A short description of the method used to perform the test

Electrochemiluminescence Immunoassay

NY State Approved Indicates the status of NY State approval and if the test is orderable for NY State clients.


Reporting Name A shorter or abbreviated version of the Published Name for a test; an abbreviated test name

T4 (Thyroxine), Total and Free