Cost of Thyroid Blood Tests

I submitted a Freedom of Information Request to my health authority in London asking for the cost of TSH, fT3 and fT4 assays. This does not include the cost of taking the blood or for the doctor’s appointment. Just the cost of running the assay.

TSH cost     £0.90
fT3              £0.92
fT4               £0.92

These costs are set whether they are combined or ordered separately, just added together as per order.



Here is a copy of the actual response which you are welcome to quote.


Dear Mr Harwood

London North West Healthcare NHS Trust is responding to your Freedom of Information request received on 28/07/2017.

FOI Ref: 1003-17

You asked:

The cost of a TSH and fT4 assay.

The cost of a combined TSH, fT3, fT4 assay.

To clarify, I’d like the net fee paid to The Doctors Laboratory to carry out each of the two assays. 

In response:

TSH cost     £0.90
fT3              £0.92
fT4              £0.92

These costs are set whether they are combined or ordered separately, just added together as per order.

We trust this is now complete and thank you for your interest in London North West Healthcare NHS Trust