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T3 (Triiodothyronine), Total Only, Serum

Performing Laboratory

Charleston Area Medical Center, Inc.


Competitive Immunoassay using direct Chemiluminescent technology
T3 measurement is used to supplement evaluation of thyroid status.

Specimen Requirements

Draw blood in a Gold top SST vacutainer or microtainer. Spin down and send 0.5 mL of serum refrigerated.   Separate serum from clot within 2 hours.   If there is a delay in shipment of >48 hours, send specimen frozen in plastic vial. Avoid gross lipemia or hemolysis.

Reference Values

0-5 years: 100-260 ng/dL
>5-10 years: 90-240 ng/dL
>10-15 years: 80-210 ng/dL
>15 years: 60-181 ng/dL

Day(s) Test Set Up

Monday through Friday

Test Classification and CPT Coding