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Test Code T4TOT T4 (Thyroxine), Total, Serum

Performing Laboratory

NorDx

Specimen Requirements

Draw blood in a plain, red-top tube or serum gel tube. Spin down and send 1 mL (minimum volume: 0.5 mL) of serum refrigerated.

 

Note:  Label specimen with patient’s name (first and last), date of birth, date and time of draw, and phlebotomist’s initials.

Reference Values

Adult: 5.3-12.3 µg/dL

Pediatric:
Ages: 1-3 yrs: 6.8-13.5 µg/dL
Ages: 3-10 yrs: 5.5-12.8 µg/dL

Methodology

 Electrochemiluminescence Immunoassay (ECLIA) 

Day(s) Test Set Up

Monday through Sunday 

Test Classification and CPT Coding

 84436