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Thyroxine

CPT Code(s): 84436
Specimen Required: Patient Preparation:
Collect:Serum separator tube or plasma separator tube. Also acceptable: Lavender (EDTA).
Specimen Preparation:Allow specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an RDL Standard Transport Tube. (Min: 0.5 mL)
Storage/Transport Temperature:Refrigerated.
Stability:After separation from cells: Ambient: 24 hours; Refrigerated: 1 week; Frozen: 1 month
New York DOH Approval Status: This test is New York DOH approved.
Aliases:
  • Syn-ThyroidT4T4 Total Only,  T4, SerumTetraiodothyronineThyroid HormoneThyroxine (T4)Total T4
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