How long blood test results take on the NHS

The NHS says you may get your blood test results after a few days, and usually within a few weeks. If you do not hear anything after a few weeks, it advises contacting the GP surgery or specialist. It also says that the GP, nurse or specialist should talk to you about your results and explain what happens next, and that some GP surgeries do not contact you unless they need to discuss the results with you.

That range reflects a mixture of things: how quickly the sample reaches the laboratory, how long the test itself takes, whether the result needs checking by a specialist, and how the clinician who ordered it handles the result once it arrives. East Sussex Healthcare notes, for example, that blood for genetic testing is sent away to a specialist laboratory and not processed on site, which is one reason some results take longer.

Because the laboratory part and the communication part are different, you can find that the result is available in the system long before anyone has contacted you. Both parts matter when you are waiting.

University Hospitals Plymouth says samples from phlebotomy clinics are transported to the pathology laboratories the same day and that results are usually completed and attached to the medical record within a couple of hours, depending on the tests requested, although physical paper requests usually take longer. That is the fast end of the range and describes tests run on automated analysers.

Ashford and St Peter's Hospitals describes the more usual spread: depending on the test, some results will be ready the same day or a few days later, and some may not be available for a few weeks. Lab Tests Online UK gives examples for other types of sample. A stool culture is checked for at least 24 to 48 hours and usually gives final results in 2 to 5 working days, and it describes a wait of 24 to 48 hours for a urine culture result.

Some results are quick because they are done in the room. Lab Tests Online UK notes that urine dipstick testing is frequently carried out in clinic with results available immediately, while samples sent on for further analysis can take several days.

Results go to the clinician who requested the test. East Sussex Healthcare says that once results are authorised by the laboratories they are accessible by your doctor and that staff cannot give out results directly to patients, as it is usually necessary for your clinician or doctor to interpret their significance in relation to your specific condition. Plymouth and Ashford and St Peter's say the same: results are not available from phlebotomy.

In practice that means the person who took your blood cannot tell you the result, and that the route to your result is via the GP surgery, hospital specialist or NHS App. If the test was requested by a hospital consultant, the result goes to them rather than to your GP, which is a common source of confusion.

The NHS adds a sensible caution: blood test results can be complicated, so ask to talk to a healthcare professional if you have questions or do not understand them. A number outside a reference range is not necessarily a problem, and a normal result is not always the end of the matter.

The NHS says you may be able to see your test results using the NHS App or by logging into your account on the NHS website.

East Sussex Healthcare explains that some results are visible in the NHS App at the same time they are sent to your doctor, but a small category of tests is automatically withheld for a period. It stresses that being on the withhold list is not an indication that your results are bad, only that the type of test is on that list. If a result you expect is missing, that may be the explanation, and the surgery can tell you.

Seeing a number online before a clinician has explained it can be unsettling. If you choose to look, remember that reference ranges vary between laboratories and that a flagged value is only one part of the picture.

The NHS suggests a few weeks as the point at which to contact the surgery or specialist if you have not heard. For tests with a defined timescale, such as myeloma tests where the NHS says results should arrive in 1 to 2 weeks, or bladder cancer tests where it says results may come the same day or after a few days, it is reasonable to ask sooner. The NHS says you can call the hospital or your GP if you are worried and they may be able to update you if your results are ready.

When you ring, give the date and place of the test, say who requested it and ask whether the result is back and what the next step is. Ask when and how you will be told, and what you should do if symptoms change in the meantime. If you are told no news means normal, ask the surgery to confirm that explicitly, since the NHS notes that practices differ in how they communicate results.