T4

Synonyms: THYROXINE, TOTAL
Computer Code: T4
Specimen Collection: 3 mL blood (light green top (Li Heparin) preferred. Red/gold acceptable).
Minimum Volume: 1 mL
Handling Instructions for Offsite Areas: If red or gold top, allow to clot. All tube types should be centrifuged for 20 minutes and refrigerated. Serum must be removed from red top tube. Min 0.5 mL serum/plasma.
Reference Values: >18 yrs: 4.5-12.5 UG/DL
Lab Code: CC
Requisition: SPEC C
Test Frequency: Daily
Routine TAT: 4 hrs
Stat TAT: 60 min
CPT Code(s): 84436
LCD or NCD:
Methodology Used:
See Addendum XVII