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HelpTest Code FT4 T4, Free
Additional Codes
Epic EAP: LAB127
Epic Description: T4, FREE
Synonym
Free T4
Free Thyroxine
Specimen Type
Blood
Specimen Required
| Collection Container | Preferred Volume | Minimum Volume | |
|---|---|---|---|
| Preferred |
Green, Lithium Heparin with Inert Gel |
4.5 mL | 1.0 mL |
| Alternate | Gold, Clot Activator with Inert Gel OR Red, No Anticoagulant, No gel | 4.5 mL | 1.0 mL |
| Preferred Micropuncture | Green Micro, Lithium Heparin with Inert Gel | 3 X 0.6 mL | 2 X 0.6 mL |
| Alternate Micropuncture | Gold Micro, Clot Activator with Inert Gel | 3 X 0.6 mL | 2 X 0.6 mL |
OALH Lab:
| Collection Container | Preferred Volume | Minimum Volume | |
|---|---|---|---|
| Preferred |
Red SST with Inert Gel |
4.0 mL | 1.0 mL |
Instructions for Collection and Transport
Centrifuge specimen. Transport refrigerated on freeze packs. If holding overnight aliquot plasma or serum into plastic vial and refrigerate. Transport refrigerated on ice packs.
Home Health Agencies: Keep specimen cool. Deliver to testing lab within 4 hours.
Aliquot Requirements
Plasma or serum
Optimum 3.0 mL
Minimum 0.4 mL
Performing Lab
Chemistry Lab
Assay Frequency
24 hours
OALH: 240 min
Routine Turnaround Time
1 day
CSR Storage Requirements
Centrifuge specimen.Transport to laboratory. If testing will be delayed more than 24 hours, aliquot plasma or serum into a plastic vial and refrigerate.
CPT Code Information
84439