Private thyroid blood test
Private thyroid testing as part of our health check packages, with two levels of detail: basic thyroid function (TSH and Free T4) in our Optimal Health Check, and a full thyroid panel including Free T3 and antibodies in our Cancer Marker checks.
No GP referral needed — book directly online
Two levels of thyroid testing
Basic thyroid function vs full thyroid panel
Not all thyroid tests are the same. We offer two levels of thyroid testing across our packages — basic thyroid function for general screening, and a full thyroid panel for more detailed investigation.
Optimal Health Check (£189)
Basic thyroid function
The two markers most commonly used by GPs to assess thyroid function. Suitable for general screening.
- Thyroid Stimulating Hormone (TSH)
- Free Thyroxine (Free T4)
Cancer Marker Checks (£249)
Full thyroid panel
Adds Free T3 (the more active hormone) and two thyroid antibodies that can flag autoimmune patterns.
- Thyroid Stimulating Hormone (TSH)
- Free Thyroxine (Free T4)
- Free Triiodothyronine (Free T3)
- Thyroglobulin Antibody
- Thyroid Peroxidase Antibody (TPO)
Thyroid testing is not currently included in our Essential or Advanced Health Checks.
Which packages include it
Thyroid testing in our packages
Three of our five packages include thyroid testing. The level of detail varies between basic and full panel.
Optimal
£189
Includes basic thyroid function (TSH and Free T4), alongside hs-CRP inflammation, uric acid and our most comprehensive standard health check.
Men’s Cancer Marker Check
£249
Includes the full 5-marker thyroid panel — TSH, Free T4, Free T3, Thyroglobulin Antibody and TPO Antibody — alongside PSA prostate testing and FIT bowel screening.
Women’s Cancer Marker Check
£249
Includes the full 5-marker thyroid panel — TSH, Free T4, Free T3, Thyroglobulin Antibody and TPO Antibody — alongside CA125 testing and FIT bowel screening.
Single blood tests start from £99, with some specialist tests priced higher. For better value, many patients choose a health check package instead, which includes a broader blood panel, on-the-day checks and a clearer picture of their results.
What results may indicate
Understanding thyroid results
Thyroid markers are most meaningful when read together. Here’s a plain-English guide to what each measures.
TSH (Thyroid Stimulating Hormone)
TSH is produced by the pituitary gland and signals your thyroid to make hormones. Raised TSH can flag patterns linked to an underactive thyroid (hypothyroidism); low TSH can flag patterns linked to an overactive thyroid (hyperthyroidism).
Free T4 (Thyroxine)
Free T4 is the main hormone produced by your thyroid. Together with TSH, it helps build a fuller picture of thyroid function than either marker alone.
Free T3 (Triiodothyronine)
Free T3 is the more active form of thyroid hormone. It can help identify patterns where T4 is normal but symptoms persist. Free T3 is included in our full thyroid panel (Cancer Marker checks), not the basic panel (Optimal).
Thyroid antibodies
Thyroglobulin Antibody and Thyroid Peroxidase (TPO) Antibody can flag patterns linked to autoimmune thyroid conditions such as Hashimoto’s or Graves’ disease. These are included in our full thyroid panel only.
Thyroid blood tests are for screening and risk awareness, not diagnosis. Thyroid conditions are usually managed by a GP, who can arrange repeat testing, imaging or treatment if appropriate. If you have current symptoms, please speak to your GP.
How it works
How private blood testing works
- 1
Choose your package
Pick the blood test panel and health check level that suits your needs.
- 2
Book Kingston or Crawley
Choose your clinic and appointment time online.
- 3
Attend your appointment
Your Health Adviser takes your blood sample and completes your on-the-day checks.
- 4
Receive your report
Blood results are usually ready within 2–5 working days, with clear explanations and next-step guidance.
Where we test
Kingston and Crawley clinics
Rated 5.0 on Google from 48 reviews
Patients regularly mention feeling relaxed, reassured and clearly guided throughout their health check.
“Really nice guy. I felt very at ease and it was a smooth process. Joe gave me insight into my diet that I hadn't considered before which I found very helpful. Definitely recommend!”
“I had an excellent experience for my first appointment. Joe was welcoming and took the time to explain each step clearly, which made the appointment feel relaxed and reassuring. The overall level of care was outstanding.”
“Super happy with the health screening experience. Joe was welcoming, friendly and gave lots of great tips about my health. Highly recommend, I will definitely be back!!”
“Highly recommended. The whole process is simple and smooth. Joe was professional and friendly, who also gave some general health advice. Definitely worth it.”
“My practitioner was very professional and friendly. The health screening was conducted in the way it was described beforehand, and all the tests were completed as expected. I would recommend the service.”
“I recently had a health screening and was thoroughly impressed from start to finish. Joe immediately made me feel at ease. The entire appointment was extremely well organised and professional, yet never felt rushed. I couldn't recommend Optimum Health Screening highly enough.”
FAQ
Thyroid blood test — frequently asked questions
Do I need a GP referral for a thyroid blood test?
Do I need to fast before a thyroid test?
What is the difference between a basic thyroid test and a full thyroid panel?
Which package should I choose for thyroid testing?
How quickly will I get my thyroid results?
What if my thyroid results are abnormal?
Can I just book a thyroid test on its own?
Related blood tests
Other health markers often checked alongside this test
Ready to book a thyroid blood test?
Choose a health check package at our Kingston or Crawley clinics, with no GP referral needed and results in 2–5 working days.
Or call 020 8058 7765