Price: £79
Turnaround: 4 -12 hours
Appointment: 15 minutes
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July 7, 2026
You can choose between scheduling a 15-minute kidney function test with one of our stellar Walk-In Clinic nurses or scheduling a test and consultation with one of our incredible City Walk-In Clinic GPs in London to discuss your kidney health and concerns.
Either way, we want you to know that you and your kidneys are important, and our kidney function blood test assesses the optimal functioning of your kidneys by measuring levels of creatinine, urea, and potassium in your system to ensure they are supporting you in living your best life!
Most people have 2 kidneys, and they have several important functions. Your kidneys filter and clean your blood to remove waste products into urine. They are also responsible for removing acid that is produced by certain cells of your body and maintain a healthy balance of water, salts, and minerals (such as sodium, calcium, phosphorus, and potassium) in your blood. They help make vitamin D, and they help the hormones responsible for helping to control your blood pressure
Unlike your tonsils and your appendix, and you can still have a fairly normal life without one of your lungs, your spleen, your gall bladder, some of your lymph nodes, the fibula bones from each leg and six of your ribs, but without dialysis or a kidney transplant, kidney failure is fatal.
Your kidneys are important, and checking in if they are working the way they should is the best thing you can do for your health.
The most common things that can go wrong with your kidneys are disease and infection, kidney stones, and cancer. Illnesses that can affect your kidneys include nephritic syndromes, renal cysts, renal cancer, chronic kidney disease, urinary tract infections, nephritis, urinary tract obstruction and kidney stones. It is currently estimated that around 9 million people in the UK will develop kidney stones at some point, highlighting how common the condition is.
Therefore, having a kidney function test done matters. Remember, your kidneys act as a natural filter for your blood by removing waste from the body. They also reabsorb water, glucose and amino acids, and produce regulatory hormones which help control your blood pressure, stimulate the production of red blood cells, and keep your bones healthy.
Ensuring your kidneys are healthy matters!
Kidney function tests are also known as renal function tests and include urea and electrolytes tests. These are often shortened to U&E (Urea and Electrolytes), EUC (Electrolyte, Urea, and Creatinine) or UEC (Urea, Electrolytes, and Creatinine).
The tests measure levels of various substances in your blood, including your electrolytes, sodium, potassium, chloride, and bicarbonate levels.
Kidney problems can arise from various causes, most commonly including:
Use our online booking engine or book your test by giving us a call.
On the online booking engine select the “appointment type” you need.
You will be seen by one of our friendly phlebotomists or trained clinicians.
Your City Walk-In Clinic doctor will perfectly advise you on what to do before your procedure, but you can expect to be asked to fast, limit certain medications you may be taking, avoid alcohol and caffeine, and to hydrate.
A kidney function test is a simple blood test. It requires a doctor or nurse to insert a needle into a vein, usually on the inner arm near your elbow, and to draw a small amount of blood.
It is a super fast procedure and involves minimal discomfort.
If you had a consultation with one of our City Walk-In Clinic GPs, they will give you a call to explain your kidney function test results to you and suggest the next steps that need to be taken.
If you did not book a City Walk-In Clinic consultation, we will email you your kidney function test results as soon as they arrive from the laboratory.
No
Hidden Charges
Transparent fees. The price you see is the price you pay.
No GP consultation
needed
No GP appointment requirement for blood tests
Established
since 1998
Experienced doctors & a professional team.
Strictly
confidential
Your medical records are kept private at all times.
We offer a wide range of private blood tests in London. Same-day appointments are available 5 days a week.
We work with experienced consultants & healthcare professionals who have received positive feedback from our patients, and with whom we have established long-term relationships.
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Written by a medical professional: Alya Shakir. Medically reviewed by Dr Enam Abood. Many Londoners start the working week feeling
City Walk-in Clinic is pleased to announce an educational event that could be useful to the general public as well
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