FREE THYROXINE (FT4) METHODOLOGY Electrochemiluminescence Immunoassay PERFORMED Mon-Fri REPORTED Same day COLLECT One 7 mL SST TRANSPORT 1 mL refrigerated serum (Min: 0.5 mL) STABILITY Refrigerated - 48 hours Frozen - Stable UNACCEPTABLE CONDITIONS N/A REMARKS N/A REFERENCE RANGE 0.80 - 2.0 ng/dL INTERPRETIVE DATA N/A CPT CODE(S) 84439 BILLING INFORMATION ICD-9 (Dx) CODE INFORMATION DATE UPDATED
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