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TSH+FREE T4
Test Code224576
CPT Codes
84439; 84443
Includes
Thyroid-stimulating hormone (TSH); free thyroxine, direct
Preferred Specimen
serum
Minimum Volume
0.5
Transport Container
"Red-top tube or gel-barrier tube
"
"
Transport Temperature
refrigerate
Specimen Stability
14 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
"Plasma specimen
"
"
Methodology
"Electrochemiluminescence immunoassay (ECLIA) "
