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Geisinger Medical Laboratories/Geisinger Proven Diagnostics Test Catalog
T3, FREE, TRACER DIALYSIS |
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ORDERING INFORMATION: |
Geisinger Epic Procedure Code: LAB3124 Geisinger Epic ID: 31992 | |
SPECIMEN COLLECTION |
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Specimen type: |
Serum | |
Preferred collection container: |
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Alternate Collection Container: |
6 mL red-top (plain, non-serum separator) tube
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Specimen required: |
1 mL aliquot of serum; minimum 0.5 mL. | |
| SPECIMEN PROCESSING |
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Specimen processing instructions: |
Centrifuge and transfer serum specimens to clean, plastic, screw-capped vial(s). | |
Transport temperature: |
Room temperature. | |
Specimen stability: |
Room temperature: 4 days. Refrigerated: 7 days. Frozen: 28 days. | |
TEST DETAILS |
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CPT code(s): |
84481, 84480 | |
| Note: The billing party has sole responsibility for CPT coding. Any questions regarding coding should be directed to the payer being billed. The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only. | ||
Methodology: |
Equilibrium Dialysis by Radioimmunoassay (RIA) Immunochemiluminescence Assay |
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Synonyms: |
Triiodothyronine, Free T3, equilibrium Quest test code 36598 FT3DT
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Clinical significance: |
T3, Free, Tracer Dialysis - T3 measurements are used to diagnose hyperthyroidism. This test can also be used to clarify thyroid status in the presence of possible protein-binding abnormalities. | |