ARUP Test Catalog
ARUP Consult Guide
Lab Tests Online
Thyroxine (T4), Total

Mnemonic:    [T4 Total]
Name:    Thyroxine (T4), Total
Specimen:    1 mL serum from a Red SST or Red top tube. Grossly hemolyzed samples are unacceptable
Minimum Spec:    0.5 mL
Transport Temp:    Refrigerated
Ref Lab/Code:    ARUP 0070140
  Method:    Chemiluminescent Immunoassay
Note:    If the provider's order did not specify the type of T4 testing, order a Free T4.
Processing Info:    This test is not a recommended screening assay. It is not orderable in Millenium (ERNE) or Centricity. Please phone the lab if indicated to order.