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Thyroxine (T4) Free
336

Information

Free thyroxine (Free T4) is used to evaluate thyroid function independent of binding protein status.

Methodology
ICMA
Specimen Required

SST, Serum. Volume 1 (0.5) mL serum. Stability: Refrigerated – 4 Days, Frozen – 2 Months

CPT Code(s)
84439