Test Details
Mnemonic
T4
Ordering Code
1000840
CPT-4 Code(s)
84436
Specimen Information
Collect
Serum separator tube (SST)
Specimen Preparation
Centrifuge, separate serum from cells and send 1.0 mL serum in a screw capped plastic vial.
Alternate Specimen
Serum: Red top
Minimum Volume
0.5 mL
Transport Temperature
Refrigerated
Rejection Criteria
Grossly hemolyzed or grossly lipemic specimens, plasma
Stability
Room temperature: 8 hours
Refrigerated: 72 hours
Frozen: Undetermined
Refrigerated: 72 hours
Frozen: Undetermined
Methodology
Chemiluminescence
Reference Range
Age Reference range
1 - 23 months 6.0 - 13.2 µg/dL
24 months (2 years) - 12 years 5.5 - 12.1 µg/dL
13 years - 20 years 5.5 - 11.1 µg/dL
21 years and above 4.5 - 10.9 µg/dL
1 - 23 months 6.0 - 13.2 µg/dL
24 months (2 years) - 12 years 5.5 - 12.1 µg/dL
13 years - 20 years 5.5 - 11.1 µg/dL
21 years and above 4.5 - 10.9 µg/dL
Performing Laboratory
Warde Medical Laboratory
New York DOH Approval Status
Yes