• Thyroid Stimulating Hormone (TSH)
  • Total T4
  • Free T4
  • Free T3
  • Thyroid Peroxidase Antibodies (TPO)
  • Reverse T3


  • Thyroid-Stimulating Hormone (TSH) – Evaluates overall thyroid function
  • Total Thyroxine (T4) – Measures the total amount of T4 produced by the thyroid gland
  • Free Thyroxine (T4) – Measures the amount of T4 available to the cells and tissues
  • Free Tri-iodothyronine (T3) – Measures the amount of T3 (the active form of the hormone) available to the cells and tissues
  • Reverse T3 – Measures the non-functioning form of the active hormone T3
  • Thyroid Peroxidase antibody (TPO) – Often measured along with ATA, these antibodies can attack proteins involved in the production of thyroid hormones rendering them dysfunctional

How It Works

  1. Find the closest LabCorp lab location near you. No need to make an appointment since walk-ins are welcomed. Once you have identified your closest location, go to step 2.

  2. Choose your test and and give use a call to place your order. 

  3. If you have a discount coupon code, let us know while placing your order.

  4. A $10 lab processing fee will be added to your total.

  5. Pay using a credit card or debit card.

  6. You will receive an order confirmation and instructions email on how to download your lab request.

  7. Print lab request form that you downloaded.

  8. Take that form to the closest LabCorp location with a picture ID. Get your blood drawn.

  9. You will receive an email when the results are ready for you to download.

    Note: You cannot place an order under someone else’s profile. The profile person’s name will appear on the lab order form.

    If you have questions, please review our FAQ page.