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17733: T4, Total (Thyroxine) Print View
T4, Total IA  view ref range  mcg/dL 

PRIMARY
1 Serum 1 (0.5) mL   Room Temperature - 7 Day(s)/Refrigerated - 7 Day(s)/Frozen - 28 Day(s)  
ALTERNATE

Thyroxine (T4) is the major secretory hormone of the thyroid. Only 0.03% of T4 is unbound and free for exchange with tissues. Thyroid function may be assessed with thyroid stimulating hormone (TSH) and Free T4 measured.
Setup Schedule
Tuesday-Saturday

Reported (Analytical Time)
Same day

CPT Code
84436

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

Notes
Transport Temperature: Room temperature Reject Criteria: Gross hemolysis; grossly lipemic;icteric specimens; plasma






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