A thyroid function blood test at LPHG measures the hormones that show how well your thyroid is working, including TSH, free T4 and free T3. It costs £150 and needs no GP referral. A nurse takes the sample and a clinician reviews the results, explaining what they mean and any next steps.
What this scan shows
- How well the thyroid is working (TSH, free T4 and free T3)
- Signs of an underactive thyroid (hypothyroidism)
- Signs of an overactive thyroid (hyperthyroidism)
- Whether thyroid medication needs adjusting
- A baseline for monitoring known thyroid conditions
What it cannot show
- The structure of the gland or any nodules, which need an ultrasound
- The underlying cause without further tests such as antibodies
- A guarantee that symptoms are caused by the thyroid
Our thyroid function blood test measures the key hormones that show how well your thyroid is working, helping to explain symptoms such as tiredness, weight change or feeling too hot or too cold.
A nurse takes the sample and a clinician reviews the results with you, explaining what they mean and arranging any further tests where needed.
Book your thyroid function blood test
Report within 24 hours. No GP referral needed.
Frequently asked questions
Do I need a GP referral for a thyroid blood test?
No. You can book a thyroid function blood test directly. A clinician reviews the results with you and advises on any next steps.
Do I need to fast before the test?
No fasting is needed. If you take thyroid medication, it is best to have the sample taken before your morning dose so the result is not affected.
What does the test measure?
It measures TSH along with free T4 and free T3, the hormones that show whether the thyroid is underactive, overactive or working normally.
How quickly will I get my results?
Results are usually available within a few days. A clinician explains what the numbers mean and whether any further tests are needed.
Should I also have a thyroid scan?
Not always. A blood test shows how the thyroid is working; a scan is added only if there is a lump or the gland feels enlarged.