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Test Catalog

Test ID: FRT4    
T4 (Thyroxine), Free, Serum

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

Yes

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

Free thyroxine is measured together with thyroid-stimulating hormone when thyroid function disorders are suspected.

Testing Algorithm Delineates situation(s) when tests are added to the initial order. This includes reflex and additional tests.

See Thyroid Function Ordering Algorithm in Special Instructions.

Special Instructions and Forms Describes specimen collection and preparation information, test algorithms, and other information pertinent to test. Also includes pertinent information and consent forms to be used when requesting a particular test

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

Electrochemiluminescence Immunoassay

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

T4 (Thyroxine), Free, S

Aliases Lists additional common names for a test, as an aid in searching

Free T4 (Thyroxine)
Free Thyroxine
FT4, Serum
Non-Protein Bound Tetraiodothyronine
T4 Free, Serum
Thyroxine, Free
Thyroid Function Cascade ORDER 83633