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Individual test · Labcorp 024026

Thyroxine (T4) and Thyroid-stimulating Hormone (TSH)

This test measures levels of Thyroxine (T4), a hormone made by your thyroid gland, and Thyroid-stimulating Hormone (TSH), which signals the thyroid to work. It helps show how well your body regulates energy and metabolism, often used to investigate symptoms like fatigue or unexplained weight changes. By comparing these two levels, doctors can see if your thyroid is overactive or underactive. However, this test does not determine the specific underlying cause of the thyroid issue without further evaluation.

How ordering works

  1. 1

    Review the order and pay on Picardo. Your account is set up as you check out.

  2. 2

    A licensed physician reviews the order and decides whether to authorize it.

  3. 3

    Give blood at a Labcorp location, or book an at-home draw for $75.00.

  4. 4

    Your results arrive in your Picardo account.

For adults 18+ in the US. Lab orders aren’t available in New York, New Jersey, Rhode Island, Pennsylvania, Maryland, Massachusetts, Hawaii or Maine.