What TSH testing captures is the signal traveling from your pituitary gland down to your thyroid. Useful as a screening tool, certainly, though it never measures directly how much active thyroid hormone your body has available. Adding free T3 (the most active thyroid hormone), free T4 (the storage form that converts to T3), and thyroid antibodies turns that one signal into a full thyroid panel, and the gain in completeness shows up most for patients with autoimmune thyroid disease or conversion issues.

In Hashimoto’s thyroiditis the immune system turns on the thyroid gland itself, wearing down its function a little at a time. It stands as the most common cause of hypothyroidism. Diagnosing it takes thyroid antibody testing, specifically TPO (thyroid peroxidase) and thyroglobulin antibodies, neither of which appears on a standard TSH test. Because TSH levels can read normal for years in a patient with Hashimoto’s before full hypothyroidism develops, antibody testing belongs in any thorough thyroid evaluation.

Fasting is not typically part of it. Some providers do prefer that TSH testing be drawn in the morning, before any thyroid medication is taken (if applicable), because that gives the most accurate baseline reading. Whatever your situation calls for, and whichever thyroid labs end up on the order, your provider at Vancouver Direct Primary Care in Portland will give you specific instructions.

Yes. Consultations about your thyroid, the lab orders themselves (comprehensive panels included), the visits where results get reviewed, and every follow-up sit inside your membership. What the membership covers is the ordering. The tests themselves are billed separately, and that cost comes down through either your insurance or our steeply discounted cash rates, whichever leaves you paying less. Either route keeps regular monitoring with TSH testing, T3, T4, and antibody panels genuinely affordable.