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T3 (Triiodothyronine), Free, Serum

Performing Laboratory

Pathology Associates Medical Laboratories (PAML)


Immunochemiluminometric Assay (ICMA)

Specimen Requirements

Draw blood in a gold-top serum gel tube(s). Spin down, separate serum from cells, and send 1 mL (minimum volume:  0.5 mL) of serum refrigerated.  Room temp: 8 hours, refrig: 1 week, froz: 2 weeks.

Reference Values

2.3-4.2 pg/mL

Day(s) Test Set Up

Monday through Saturday

Test Classification and CPT Coding