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Test ID: T4TF    
T4 (Thyroxine), Total and Free

Secondary ID A test code used for billing and in test definitions created prior to November 2011


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


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

See individual test descriptions for:

-T4 / T4 (Thyroxine), Total Only, Serum

-FRT4 / T4 (Thyroxine), Free, Serum

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
T4T4 (Thyroxine), Total Only, SYesYes
FRT4T4 (Thyroxine), Free, SYesYes

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

FRT4: Chemiluminometric Immunoassay

T4: Immunoenzymatic Assay

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

T4 (Thyroxine), Total and Free