Lab test
Thyroid Test Panel with TSH
This thyroid panel measures TSH together with T3 uptake, T4, and the T7 index to assess how the thyroid is functioning.
- Typical price
- From $118
- Results
- 1-3 business days
- Preparation
- See preparation notes below
- Sample
- Blood draw or sample collection at a local center
About this test
This thyroid panel measures TSH together with T3 uptake, T4, and the T7 index to assess how the thyroid is functioning. TSH is the pituitary signal that tells the thyroid how much hormone to make; T4 is the main hormone the thyroid produces; T3 uptake reflects binding capacity; and the T7 index combines T4 and T3 uptake into a corrected estimate of free thyroxine. Used together, these measures help determine whether the thyroid is underactive or overactive and whether the pituitary is responding appropriately. Results are interpreted as a pattern and alongside symptoms.
What this test measures
- TSH (Thyroid-Stimulating Hormone) The pituitary hormone that regulates thyroid hormone production.
- T3 Uptake An indirect measure of thyroid hormone binding capacity.
- T4 (Thyroxine) The main hormone produced by the thyroid gland.
- T7 (Free Thyroxine Index) A calculated index correcting T4 for binding capacity.
Who this test may be right for
- Adults with fatigue, weight change, or temperature intolerance
- People with palpitations, tremor, or unexplained anxiety
- Individuals being screened for thyroid dysfunction
- Those being monitored for a known thyroid condition
Before your visit
- Report thyroid medications and biotin-containing supplements to the laboratory
- Follow any timing instructions provided with your order
- Tell your provider if you are pregnant, as interpretation differs
Understanding your results
The four measures are compared against reference ranges and read together. A high TSH with a low T7 index is consistent with an underactive thyroid, while a low TSH with a high index suggests an overactive thyroid. Binding proteins and medications can affect T3 uptake and T4, which is why the combined pattern matters. A healthcare provider should interpret the panel with your symptoms and any additional testing.
Order this test online
- Buy online in a few minutes - no doctor's visit needed for most tests.
- Sample collection at a patient service center near you.
- Results are typically ready within 1-3 business days.
- Secure, lab-reviewed results delivered to your account.
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Questions people ask
What does TSH tell you that T4 does not?
TSH reflects the pituitary's instruction to the thyroid, so it can reveal thyroid dysfunction even when T4 is still within range.
What is the T7 index in this panel?
The T7 index is computed from T4 and T3 uptake to estimate free thyroxine, correcting for differences in binding proteins.
Can this panel distinguish an overactive from an underactive thyroid?
It can show patterns consistent with either, but a healthcare provider confirms the interpretation with symptoms and follow-up testing.
Do thyroid medications affect this panel?
Yes, thyroid medications and biotin can influence the results, so report them to the laboratory and your provider.
What does the Thyroid Test Panel with TSH measure?
The best way to test thyroid function is to measure TSH, T3 uptake, T4 and T7.
Do I need to fast before this test?
Follow the lab's instructions.
How long do results take?
Most Thyroid Test Panel with TSH results are released in 1-3 business days. Specialty testing can take longer.
Is this test right for me?
This page is educational and not medical advice. Talk to a licensed healthcare provider about which tests fit your situation.
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