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Thyroxine (T4) Free, Direct (LABCORP)
Test Code99901000064
Alias/See Also
LAB127: Free T4
LAB3180: Thyroxine (T4) Free, Direct, S
LAB3203: Thyroxine (T4) Free, Direct, S | LABCORP EAP: 001974
LAB3180: Thyroxine (T4) Free, Direct, S
LAB3203: Thyroxine (T4) Free, Direct, S | LABCORP EAP: 001974
CPT Codes
84439x1
Preferred Specimen
LABCORP LAB: Serum Separator Tube (Refrigerated) Min Vol: .7
Other Acceptable Specimens
LABCORP LAB: YELLOW TOP: (Refrigerated) Min Vol: .7
LABCORP LAB: MICRO RED: (Refrigerated) Min Vol: .7
LABCORP LAB: MICRO YELLOW: (Refrigerated) Min Vol: .7
LABCORP LAB: RED TOP - PLAIN: (Refrigerated) Min Vol: .7
LABCORP LAB: MICRO RED: (Refrigerated) Min Vol: .7
LABCORP LAB: MICRO YELLOW: (Refrigerated) Min Vol: .7
LABCORP LAB: RED TOP - PLAIN: (Refrigerated) Min Vol: .7
Transport Temperature
Specimen Serum (preferred) or plasma Volume 1 mL Minimum Volume 0.3 mL (Note: This volume does not allow for repeat testing.) Container Red-top tube, gel-barrier tube, lavender-top (EDTA) tube, or green-top (heparin) tube Collection Separate serum or plasma from cells.
Report Available
LABCORP LAB
STAT: 5760 min
Routine: 5760 min
Extended TAT: No TAT min
Timed: 5760 min
Life or Death: 5760 min
STAT: 5760 min
Routine: 5760 min
Extended TAT: No TAT min
Timed: 5760 min
Life or Death: 5760 min
Last Updated: March 6, 2023
