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T4, Free

Centralized Core Laboratory : Special Chemistry

Test ID/Workstation :
T4FR SCRED
Specimen Type:
Blood
Tube Type:
Red top (no anticoagulant) tube
Collection Volume:
1.0 mL (minimum 0.7 mL)
Cause for Rejection:
Hemolysis
Storage:
Frozen
Availability:
Mon-Fri (0800-1600)
Methodology:
Chemiluminescent Assay
Special Instructions:
Do not use serum separator tube. Specimen must be in lab by 1300 for same day results.
Lab/Phone:
330-543-8484
TAT:
1 hour
Additional Info:
Ref. range is age dependent; avail on patient report
CPT Code:
84439
Synonyms:
Free Thyroxine; Unbound T4