Thyroid Function Test (TSH)

This thyroid TSH test measures the level of thyroid-stimulating hormone (TSH) in your blood that can help determine if your thyroid is functioning properly and identify signs of hypothyroidism or hyperthyroidism. If results are abnormal, a reflex test for free T4 will be performed at no additional cost to help identify a possible thyroid disorder.

This test is commonly used as a starting point in evaluating thyroid function. Noticeable changes in your metabolism (eg, weight, temperature, and energy) may be an indication of abnormal levels of thyroid-stimulating hormone (TSH) in your blood.

This thyroid function test may be right for you if any of the following are true:

• You have a risk factor of thyroid disease:

  • Family history

  • Older age (over 50)

  • Female

  • Recent pregnancy

  • History of thyroid surgery

  • Radiation treatment for past thyroid

  • Taking medication high in iodine

  • Diagnosed with an autoimmune disease

• You are experiencing signs or symptoms of thyroid disease (see Signs & symptoms section below)

Please note: Pregnancy and medications like steroids will affect your results.