Test directory: T4, Total

Ordering Code 5531
Test Name T4, Total
Alias Thyroxine
Preferred Specimen Serum
Preferred Container SST (Gold)
Other Specimen/Container Plasma in Lithium Heparin (Green), Plasma in Sodium Heparin (Green)
Optimum Volume 1 mL
Transport Requirements Oahu: Ambient
Airline: Ambient
Specimen Stability Ambient: 7 Days
Refrigerated: 7 Days
Frozen: 28 Days
Rejection Criteria Serum in plain Red (No Gel)
Avail. Stat NO
Analytic Time Up to 7 Days
Methodology Immunoassay
Reference Lab  Quest Diagnostic Lab-NI

Reference range(s)

The reference ranges listed below are valid on this date of June 1, 2025.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
T4, Total ALL See report.