Specimen:
Collect
- One SST
Also Acceptable:
- One Green Top (Li Heparin)
- One Green Top (Na Heparin)
- One Red Top
Submit
- 1 mL (Min:0.5 mL) Serum . Submit Refrigerated. Submit in a Standard Transport Tube.
Also Acceptable:
- 1 mL (Min:0.5 mL) Plasma . Submit Refrigerated. Submit in a Standard Transport Tube.
Special Handling
- Allow specimen to clot completely at room temperature
- Avoid Repeated Freeze/Thaw Cycles
- Separate from cells ASAP
- For patients receiving therapy with high biotin doses (>5 mg/day), no laboratory test specimen should be collected until at least 8 hours after the last biotin administration.
Stability
See Individual Components
Methodology
- See Individual Components
Performed
Mon-Fri
Reported
1-3 Day(s)
CPT Codes
- 84436
- 84479
Interpretive Data
Please see report for interpretive data.
Biotin in specimens taken from patients on high-dose biotin therapy or supplements may interfere with this test and cause inaccurate test results. It is recommended that for patients receiving therapy with high biotin doses (> 5 mg/day), no laboratory test specimen should be collected until at least 8 hours after the last biotin administration.
Biotin in specimens taken from patients on high-dose biotin therapy or supplements may interfere with this test and cause inaccurate test results. It is recommended that for patients receiving therapy with high biotin doses (> 5 mg/day), no laboratory test specimen should be collected until at least 8 hours after the last biotin administration.
Components
- 2003 - T4 TOTAL
- 2001 - T3 UPTAKE
- 2007 - FTI
Last Updated: March 15, 2025 @ 9:13 am
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