Medically reviewed by Do-Eun Lee, MD Thyroid blood tests are an important part of diagnosing and treating thyroid disease.

A T4 blood test measures your thyroxine hormone levels, which can show how well your thyroid is working. Low T4 levels are called hypothyroidism, and high T4 levels are called hyperthyroidism.

Numerous blood panels test specific aspects of your health, ... The thyroid function panel measures the levels of these hormones to assess thyroid-related health.

These tests help your doctor know if you have a thyroid issue: Blood tests. O ne of the surest ways to diagnose a thyroid problem, these tests measure the amount of thyroid hormones in your blood.

Medicare typically covers thyroid function blood tests, including a TSH blood test. Learn more about thyroid testing, parts of Medicare that may pay for it, and what you can expect.

What to know about 6 important blood tests for your health. Who should take the tests, ... A TSH (thyroid-stimulating hormone) test can flag dysfunction of the thyroid gland, ...

4. Surveillance Over Known Thyroid Conditions. If you've previously been diagnosed with hypothyroidism or hyperthyroidism, your regular TSH tests are key to measuring the success of your treatment ...

Medicare offers coverage for thyroid diagnosis and treatment. Part B covers outpatient blood tests, and tests as an inpatient are covered by Part A.