Sample Requirements:
SST tube. No fasting required.
Purpose:
Assesses thyroid function; active form of triiodothyronine.
High Levels:
Hyperthyroidism.
Low Levels:
Hypothyroidism.
Reference Range:
2.3–4.2 pg/mL
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Test Code:
PDL0156
Division:
Chemistry
CPT Code:
84481
Sample Type:
Serum