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867: T4 (thyroxine), Total Print View
T4 (Thyroxine), 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
  Plasma Heparinized 1 (0.5) mL   Refrigerated - 7 Day(s)/Frozen - 28 Day(s)/Room Temperature - 7 Day(s)  
  Plasma Lithium Heparin 1 (0.5) mL   Refrigerated - 7 Day(s)/Room Temperature - 7 Day(s)/Frozen - 28 Day(s)  

For diagnosis of hypothyroidism and hyperthyroidism.

Note: Free T4 Index (T7) will only be calculated and reported if test
code 861 (T3 Uptake) is ordered well.
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 tempererature: Room temperature
Methodology: Immunoassay






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