Blood tests

Blood Tests

We provide blood test services for adults and children in separate clinics in the hospital: 

Blood tests for people aged 16 and over
The GP blood tests unit is located in the outpatients' department, main building, level 0. 

Mondays and Fridays are the busiest days of the week for the blood test department. If you are able to be flexible, please attend on Tuesday, Wednesday or Thursday. 

A limited number of walk-in appointments are available each morning, but these will be closed as soon as the clinic reaches capacity. Wait times for walk-in patients can be more than two hours at our busiest times. 

You can pre-book a blood test appointment, which lets you choose an appointment time and reduces the chance of needing to wait. Click on the green button, create an account by answering a few short questions, and book an appointment at a time and date convenient for you.

Book online 

Alternatively, if you are unable to book online, please call:

  • 020 8887 2143 (Monday–Friday, 8am–5pm)
  • 020 8887 3663 (Monday–Friday, 8am–5pm)
  • 020 8887 3664 (Monday–Friday, 8am–5pm)

Blood tests unit opening times (for people aged 16 and over)

Monday - 7.30am to 5.45pm 
Tuesday - 7.30am to 6.45pm
Wednesday - 7.30am to 4.45pm
Thursday - 7.30am to 6.45pm
Friday - 7.30am to 4.45pm

Where else can I have a blood test? 

Due to Coronavirus COVID-19 outbreak only urgent bloods are being requested by GPs. If your GP requires you to have an urgent blood test, the GP will give you a blood test form indicating urgent and a number to ring for an appointment at North Middlesex Hospital or the Laurels on 020 8887 3662/3.

You may be able to have your urgent blood test taken at your doctor's surgery or at a clinic near your home. If this is possible your doctor will tell you. We also provide blood test clinics at the Laurels Healthy Living Centre, opposite St Ann’s Hospital main entrance. 

Blood tests at the Laurels Healthy Living Centre are located close to its reception area, opposite the centre's cafeteria. You need to take a ticket and wait to be called.

Current opening times for the Laurels Healthy Living Centre blood tests:   
Monday to Thursday, 8.30am–3.45pm,  Friday, 8.30am–2.45pm. 

Alternatively you could go to the Blood test centre run out of Lordship Lane Health Centre run out of:-

Lordship Lane health Centre, 239 Lordship lane Tottenham N17 6AA

  • Monday 9am–12.00pm
  • Tuesday 9am–12.00pm
  • Thursday 9am–12.00pm

This is a walk in service, no appointment required.

Children under the age of two 

If you have a child under the age of two, you will need to book an appointment for a blood test in our children's outpatients clinic. 

Please call 0208 887 3095/3863 between Monday-Friday, 9am-4pm to book your child under the age of two for an appointment.

Children aged between two and 16 

If your child is aged between two and 16, they are all seen in our children's outpatient clinic in the hospital's main building, level -1. 

As of Monday 20 July 2020, you will now be required to book an appointment.

You can pre-book a blood test appointment, which lets you choose an appointment time and reduces the chance of needing to wait. Click on the green button, create an account by answering a few short questions, and book an appointment at a time and date convenient for you.

Book online 

You can also phone the department on 0208 887 3663 / 3664.

The clinic is open Monday to Friday, 9am-5pm.  

Patients should arrive no later than 4.30pm. We treat children as a priority in the clinic and see them as soon as possible.

Please note that we no longer offer a service for fasting blood tests. Our paediatric consultants advise this is almost always unnecessary. GPs have been advised what to do if they believe a fasting blood test is needed. 

Children’s outpatient blood tests clinic opening times

Monday - 9am-12pm and 1-4.30pm 
Tuesday - 9am-12pm and 1-4.30pm 
Wednesday -  9am-12pm and 1-4.30pm 
Thursday - 9am-12pm and 1-4.30pm 
Friday - 9am-12pm and 1-4.30pm 

Children aged between two and 16 should attend the children’s outpatient clinic with a parent or carer. The clinic is in the hospital's main building, level -1. 

Frequently asked questions:

Why do I need a blood test?
Blood tests are often needed for your doctor to work out what is causing your symptoms. They may also be needed to check that treatment you are on is being effective. There are a very large number of things that can be tested from a blood sample and the ones your doctor is testing for will be written on the form you were given. If you want to know more about the tests, you can visit Lab Tests Online at where you will find a wide range of information.

Do I need an appointment for my blood test? 
At North Middlesex University Hospital we now have an appointment system for adult blood tests (people who are aged 16 or over) . Please see the details above. 

The Laurels Healthy Living Centre operates an open access (walk-in) policy. For adult patients who are not fasting, the afternoon or early evening is the best time to come as it is usually least busy then and you may be seen in as little as 10 minutes. Monday mornings are usually the busiest times, so please avoid these if possible. 

What happens during a blood test?
At the North Middlesex University Hospital and the Laurels Healthy Living Centre your blood will be taken by a group of skilled staff, called phlebotomists. It is normally a quick and almost painless procedure.

The phlebotomist will take the blood from the crease of the elbow of the arm you use least. This normally has a vein that can be accessed easily (you can normally see this vein as a blue line if you look at your arm). A strap is placed above the elbow and tightened slightly to increase the size of the vein. A needle is placed in the vein and blood is sucked into an attached tube. After taking the blood the phlebotomist will use a cotton wool pad and tape to cover the spot the needle entered to prevent any bleeding. In children, the phlebotomist may use an anaesthetic spray before taking their blood to make it even easier.  

Some people are more difficult to take blood from, and a small minority of people can bruise easily. This can often look alarming but will normally fade within a day or two.

When will the tests be ready? Who will give me my results?
We begin testing your blood on the day it is taken. Most results are ready on the same day but some can take several days to be completed. All the results are sent to the person who wrote your request form, usually your GP.

Glucose tolerance tests
If you are having a glucose tolerance test please, please book it online on the link above. 

Domiciliary service 
We provide a service for taking blood samples at home for housebound patients in Enfield. Appointments for this non-urgent service can only be made through the patient's GP. All referrals should be emailed to

See our patient information leaflet for further information. For domicilliary enquiries, please call 020 8887 2238.

Page last updated: July 2020