T4, Free, Blood Spot
The T4 Free Test measures the level of free thyroxine (T4) in the body. T4 is a hormone produced by the thyroid gland that helps regulate metabolism and body temperature. T4 can be bound to protein or circulate “freely” (unbound).
Please fill in all 5 circles on the blood spot card.
Results take 1 to 2 weeks upon receipt of the specimen by the laboratory.
Choose the test you want (be sure to pick the laboratory you want to use).
Pay by credit card or PayPal®.
You pay directly and we do not bill your insurance.
After purchasing your testing you will receive an email with your lab requisition. Bring this form to the laboratory.
If you have selected the option to have an At Home Test Kit delivered to you, you will receive your test kit in the mail within 5 to 7 business days. (Not all tests are available as At Home Test Kits.)
We’ll email you when your results are ready. Sign into your account to view and download your result reports.
Certain result values may prompt a phone call from our ordering provider to ensure the patient is aware of their result.