TSH with Reflex to Free T4
A smart thyroid screen — TSH first, and it automatically adds Free T4 only if the TSH comes back abnormal. One draw, results usually in 1–2 business days.
This is an efficient, stepwise thyroid check. It starts with TSH — the most sensitive first-line marker — and automatically reflexes to a Free T4 only if your TSH is out of range. You get a simple screen when everything is normal, and an extra layer of detail exactly when it's needed.
Included Tests
What This Panel Measures
Who Should Get This Panel
- You want an efficient, first-line thyroid check
- You have possible thyroid symptoms and want detail only if needed
- You're doing a routine wellness screen
- You have a family history of thyroid disease
Conditions Screened
Related Symptoms
When to Get Tested
Any time; no fasting is required. If you take thyroid medication, test at a consistent time relative to your dose so results are comparable.
Understanding Your Results
Results post to your secure online account usually in 1–2 business days. If your TSH is normal, that's your result; if it's abnormal, a Free T4 is added automatically so you can see whether thyroid hormone output is affected. A high TSH with low Free T4 suggests an underactive thyroid, and the reverse suggests an overactive one.
Frequently Asked Questions
Do I need to fast?
What does 'reflex' mean?
Is this billed to insurance?
Pairs Well With — Same Blood Draw
Test centers don’t accept payment — you pay securely here; the lab just does the draw.
What happens after you order?
- 1Your lab order form & test code appear in your secure online account — with your test center’s address.
- 2We send your lab requisition to the test center electronically.
- 3Walk in & get tested — tests usually take 5 minutes or less.