Laboratory Services

T4, Total

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Updated Test Information:

Test Description
T4, Total
Synonym(s)
T4, Total T4
Test ID
T4
Performing Lab
Incyte Diagnostics
Specimen Type
Serum
Specimen Requirements
SST
Alternate Specimen Type
Red, Li‑heparin, K2‑EDTA and K3‑EDTA plasma
Minimum Sample Volume
1 mL
Pediatric Min. Volume (if applicable)
500 uL
Stability
4 days at 20‑25 °C,
8 days at 2‑8 °C,
12 months at ‑20 °C (± 5 °C) Freeze only once
Methodology
electrochemiluminescence immunoassay “ECLIA”
Estimated TAT
0-2 days
Testing Schedule
Monday-Saturday
CPT Code(s)
84436
Reference Range
4.5-11.7 ug/dL
LOINC Code(s)
3026-2