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Free T4 Test - Cost, Preparation, Normal Range | aihealz | aihealz

Tests/Blood Tests/Thyroid Tests/FT4

Lab TestEndocrinehome collection

Free T4 Test.

aka FT4 · LOINC:3024-7

Free Thyroxine level

Sample typeblood

Report time1d

FastingNo

Starting at$4

§ 01

Preparation

No fasting required. Stop biotin supplements 2 days before test. More accurate than total T4 in pregnancy.

§ 02

Normal reference ranges

Free T40.8-1.8 ng/dL

Normal ranges may vary between labs. Always consult your doctor for interpretation.

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